diff --git a/.eslintrc.js b/.eslintrc.js
index 4fcc035..b977257 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -28,5 +28,6 @@ module.exports = {
       named: 'always',
       asyncArrow: 'always',
     }],
+    'indent': ['error', 2]
   }
 }
diff --git a/.travis.yml b/.travis.yml
index 3e9f562..b745388 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,13 +6,25 @@ node_js:
 sudo: false
 dist: xenial
 
+cache:
+  directories:
+    - node_modules
+    - apps/contribution/node_modules
+    - apps/contributor/node_modules
+    - apps/proposal/node_modules
+    - apps/token/node_modules
+    - apps/vault/node_modules
+
 install:
   - npm install
 
+before_script:
+  - npm run devchain &
+
 script:
   - npm run lint:wrapper
   - npm run lint:contract-tests
-  # - yarn lint:contracts
+  - npm run test
 
 branches:
   only:
diff --git a/apps/contribution/package-lock.json b/apps/contribution/package-lock.json
index b4da1da..539e222 100644
--- a/apps/contribution/package-lock.json
+++ b/apps/contribution/package-lock.json
@@ -7751,6 +7751,7 @@
             "minipass": {
               "version": "2.3.5",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "safe-buffer": "^5.1.2",
                 "yallist": "^3.0.0"
@@ -7767,6 +7768,7 @@
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -7850,6 +7852,7 @@
             "once": {
               "version": "1.4.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -7925,7 +7928,8 @@
             },
             "safe-buffer": {
               "version": "5.1.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -8017,7 +8021,8 @@
             },
             "yallist": {
               "version": "3.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             }
           }
         },
@@ -8099,7 +8104,6 @@
               "version": "1.3.5",
               "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
               "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
-              "optional": true,
               "requires": {
                 "mime-types": "~2.1.18",
                 "negotiator": "0.6.1"
@@ -8135,14 +8139,12 @@
             "any-promise": {
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8=",
-              "optional": true
+              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
             },
             "array-flatten": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-              "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
-              "optional": true
+              "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
             },
             "asn1": {
               "version": "0.2.4",
@@ -8156,7 +8158,6 @@
               "version": "4.10.1",
               "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
               "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.0.0",
                 "inherits": "^2.0.1",
@@ -8850,8 +8851,7 @@
             "base64-js": {
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
-              "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
-              "optional": true
+              "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
             },
             "bcrypt-pbkdf": {
               "version": "1.0.2",
@@ -8893,7 +8893,6 @@
               "version": "1.2.2",
               "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
               "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
-              "optional": true,
               "requires": {
                 "readable-stream": "^2.3.5",
                 "safe-buffer": "^5.1.1"
@@ -8923,7 +8922,6 @@
               "version": "1.18.3",
               "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
               "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
-              "optional": true,
               "requires": {
                 "bytes": "3.0.0",
                 "content-type": "~1.0.4",
@@ -8941,7 +8939,6 @@
                   "version": "2.6.9",
                   "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
                   "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-                  "optional": true,
                   "requires": {
                     "ms": "2.0.0"
                   }
@@ -9002,7 +8999,6 @@
               "version": "4.0.1",
               "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
               "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.1.0",
                 "randombytes": "^2.0.1"
@@ -9065,7 +9061,6 @@
               "version": "5.2.1",
               "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
               "integrity": "sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==",
-              "optional": true,
               "requires": {
                 "base64-js": "^1.0.2",
                 "ieee754": "^1.1.4"
@@ -9075,7 +9070,6 @@
               "version": "1.2.0",
               "resolved": "https://registry.npmjs.org/buffer-alloc/-/buffer-alloc-1.2.0.tgz",
               "integrity": "sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==",
-              "optional": true,
               "requires": {
                 "buffer-alloc-unsafe": "^1.1.0",
                 "buffer-fill": "^1.0.0"
@@ -9084,8 +9078,7 @@
             "buffer-alloc-unsafe": {
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
-              "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg==",
-              "optional": true
+              "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg=="
             },
             "buffer-crc32": {
               "version": "0.2.13",
@@ -9096,8 +9089,7 @@
             "buffer-fill": {
               "version": "1.0.0",
               "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
-              "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw=",
-              "optional": true
+              "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw="
             },
             "buffer-from": {
               "version": "1.1.1",
@@ -9107,8 +9099,7 @@
             "buffer-to-arraybuffer": {
               "version": "0.0.5",
               "resolved": "https://registry.npmjs.org/buffer-to-arraybuffer/-/buffer-to-arraybuffer-0.0.5.tgz",
-              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo=",
-              "optional": true
+              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo="
             },
             "buffer-xor": {
               "version": "1.0.3",
@@ -9118,8 +9109,7 @@
             "bytes": {
               "version": "3.0.0",
               "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
-              "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
-              "optional": true
+              "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
             },
             "bytewise": {
               "version": "1.1.0",
@@ -9251,7 +9241,6 @@
               "version": "2.8.1",
               "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
               "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
-              "optional": true,
               "requires": {
                 "graceful-readlink": ">= 1.0.0"
               }
@@ -9275,14 +9264,12 @@
             "content-disposition": {
               "version": "0.5.2",
               "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
-              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
-              "optional": true
+              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
             },
             "content-type": {
               "version": "1.0.4",
               "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
-              "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
-              "optional": true
+              "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
             },
             "convert-source-map": {
               "version": "1.6.0",
@@ -9295,20 +9282,17 @@
             "cookie": {
               "version": "0.3.1",
               "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
-              "optional": true
+              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
             },
             "cookie-signature": {
               "version": "1.0.6",
               "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
-              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
-              "optional": true
+              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
             },
             "cookiejar": {
               "version": "2.1.2",
               "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
-              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==",
-              "optional": true
+              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA=="
             },
             "core-js": {
               "version": "2.6.5",
@@ -9324,7 +9308,6 @@
               "version": "2.8.5",
               "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
               "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
-              "optional": true,
               "requires": {
                 "object-assign": "^4",
                 "vary": "^1"
@@ -9417,8 +9400,7 @@
             "decode-uri-component": {
               "version": "0.2.0",
               "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-              "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
-              "optional": true
+              "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
             },
             "decompress": {
               "version": "4.2.0",
@@ -9448,7 +9430,6 @@
               "version": "3.3.0",
               "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
               "integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
-              "optional": true,
               "requires": {
                 "mimic-response": "^1.0.0"
               }
@@ -9457,7 +9438,6 @@
               "version": "4.1.1",
               "resolved": "https://registry.npmjs.org/decompress-tar/-/decompress-tar-4.1.1.tgz",
               "integrity": "sha512-JdJMaCrGpB5fESVyxwpCx4Jdj2AagLmv3y58Qy4GE6HMVjWz1FeVQk1Ct4Kye7PftcdOo/7U7UKzYBJgqnGeUQ==",
-              "optional": true,
               "requires": {
                 "file-type": "^5.2.0",
                 "is-stream": "^1.1.0",
@@ -9583,8 +9563,7 @@
             "depd": {
               "version": "1.1.2",
               "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
-              "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=",
-              "optional": true
+              "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
             },
             "des.js": {
               "version": "1.0.0",
@@ -9599,8 +9578,7 @@
             "destroy": {
               "version": "1.0.4",
               "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
-              "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=",
-              "optional": true
+              "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
             },
             "detect-indent": {
               "version": "4.0.0",
@@ -9639,8 +9617,7 @@
             "duplexer3": {
               "version": "0.1.4",
               "resolved": "https://registry.npmjs.org/duplexer3/-/duplexer3-0.1.4.tgz",
-              "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI=",
-              "optional": true
+              "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI="
             },
             "ecc-jsbn": {
               "version": "0.1.2",
@@ -9654,8 +9631,7 @@
             "ee-first": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
-              "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=",
-              "optional": true
+              "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
             },
             "electron-to-chromium": {
               "version": "1.3.113",
@@ -9679,8 +9655,7 @@
             "encodeurl": {
               "version": "1.0.2",
               "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
-              "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=",
-              "optional": true
+              "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
             },
             "encoding": {
               "version": "0.1.12",
@@ -9769,8 +9744,7 @@
             "escape-html": {
               "version": "1.0.3",
               "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
-              "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=",
-              "optional": true
+              "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
             },
             "escape-string-regexp": {
               "version": "1.0.5",
@@ -9785,8 +9759,7 @@
             "etag": {
               "version": "1.8.1",
               "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
-              "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=",
-              "optional": true
+              "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
             },
             "eth-block-tracker": {
               "version": "3.0.1",
@@ -9864,7 +9837,6 @@
               "version": "0.1.27",
               "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
               "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.11.6",
                 "elliptic": "^6.4.0",
@@ -10279,7 +10251,6 @@
               "version": "0.1.6",
               "resolved": "https://registry.npmjs.org/ethjs-unit/-/ethjs-unit-0.1.6.tgz",
               "integrity": "sha1-xmWSHkduh7ziqdWIpv4EBbLEFpk=",
-              "optional": true,
               "requires": {
                 "bn.js": "4.11.6",
                 "number-to-bn": "1.7.0"
@@ -10288,8 +10259,7 @@
                 "bn.js": {
                   "version": "4.11.6",
                   "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
                 }
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@@ -10305,8 +10275,7 @@
             "eventemitter3": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-1.1.1.tgz",
-              "integrity": "sha1-R3hr2qCHyvext15zq8XH1UAVjNA=",
-              "optional": true
+              "integrity": "sha1-R3hr2qCHyvext15zq8XH1UAVjNA="
             },
             "events": {
               "version": "3.0.0",
@@ -10326,7 +10295,6 @@
               "version": "4.16.4",
               "resolved": "https://registry.npmjs.org/express/-/express-4.16.4.tgz",
               "integrity": "sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==",
-              "optional": true,
               "requires": {
                 "accepts": "~1.3.5",
                 "array-flatten": "1.1.1",
@@ -10364,7 +10332,6 @@
                   "version": "2.6.9",
                   "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
                   "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-                  "optional": true,
                   "requires": {
                     "ms": "2.0.0"
                   }
@@ -10372,8 +10339,7 @@
                 "statuses": {
                   "version": "1.4.0",
                   "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
-                  "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew==",
-                  "optional": true
+                  "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
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@@ -10436,8 +10402,7 @@
             "file-type": {
               "version": "5.2.0",
               "resolved": "https://registry.npmjs.org/file-type/-/file-type-5.2.0.tgz",
-              "integrity": "sha1-LdvqfHP/42No365J3DOMBYwritY=",
-              "optional": true
+              "integrity": "sha1-LdvqfHP/42No365J3DOMBYwritY="
             },
             "file-uri-to-path": {
               "version": "1.0.0",
@@ -10448,7 +10413,6 @@
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.1.tgz",
               "integrity": "sha512-Y1GUDo39ez4aHAw7MysnUD5JzYX+WaIj8I57kO3aEPT1fFRL4sr7mjei97FgnwhAyyzRYmQZaTHb2+9uZ1dPtg==",
-              "optional": true,
               "requires": {
                 "debug": "2.6.9",
                 "encodeurl": "~1.0.2",
@@ -10463,7 +10427,6 @@
                   "version": "2.6.9",
                   "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
                   "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-                  "optional": true,
                   "requires": {
                     "ms": "2.0.0"
                   }
@@ -10471,8 +10434,7 @@
                 "statuses": {
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-      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-1.2.2.tgz",
-      "integrity": "sha512-NJcK2dg8v8rLIMiIYslDsYVoskjDA5V4Z0C+bo+WoMvjzwVjlELGHdLpEbxLVvd6V7zb0pWH/qtQP5dCsgoETw==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-2.0.0.tgz",
+      "integrity": "sha512-z7e5vF0cjXqI+NPtC5lPFhHp5fVJxRoJmO6nJi18/Lolt1duXxUM30/ckqJfq+eDamBzhPfYRs5/0aaDovXzfg==",
       "dev": true
     },
     "@resolver-engine/core": {
diff --git a/apps/contribution/package.json b/apps/contribution/package.json
index ca4dd0f..ba7d0d8 100644
--- a/apps/contribution/package.json
+++ b/apps/contribution/package.json
@@ -7,7 +7,7 @@
     "@aragon/cli": "^5.9.6"
   },
   "devDependencies": {
-    "@aragon/test-helpers": "^1.1.0",
+    "@aragon/test-helpers": "^2.0.0",
     "eth-gas-reporter": "^0.2.0",
     "ganache-cli": "^6.4.3",
     "solidity-coverage": "^0.5.11"
@@ -26,10 +26,7 @@
     "publish:minor": "aragon apm publish minor",
     "publish:major": "aragon apm publish major",
     "versions": "aragon apm versions",
-    "test": "TRUFFLE_TEST=true PORT=7545 npm run ganache-cli:test",
-    "test:gas": "GAS_REPORTER=true npm test",
-    "coverage": "SOLIDITY_COVERAGE=true npm run ganache-cli:test",
-    "ganache-cli:test": "./node_modules/@aragon/test-helpers/ganache-cli.sh"
+    "test": "aragon contracts test"
   },
   "keywords": []
 }
diff --git a/apps/contributor/contracts/Contributor.sol b/apps/contributor/contracts/Contributor.sol
index d4844bf..e64d116 100644
--- a/apps/contributor/contracts/Contributor.sol
+++ b/apps/contributor/contracts/Contributor.sol
@@ -57,10 +57,13 @@ contract Contributor is AragonApp {
   }
 
   function updateContributorAccount(uint32 id, address oldAccount, address newAccount) public auth(MANAGE_CONTRIBUTORS_ROLE) {
+    require(newAccount != address(0), "invalid new account address");
+    require(getContributorAddressById(id) == oldAccount, "contributor does not exist");
+
     contributorIds[oldAccount] = 0;
     contributorIds[newAccount] = id;
     contributors[id].account = newAccount;
-    ContributorAccountUpdated(id, oldAccount, newAccount);
+    emit ContributorAccountUpdated(id, oldAccount, newAccount);
   }
 
   function updateContributorProfileHash(uint32 id, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize) public isInitialized auth(MANAGE_CONTRIBUTORS_ROLE) {
diff --git a/apps/contributor/contracts/test/Spoof.sol b/apps/contributor/contracts/test/Spoof.sol
new file mode 100644
index 0000000..34fb889
--- /dev/null
+++ b/apps/contributor/contracts/test/Spoof.sol
@@ -0,0 +1,16 @@
+pragma solidity ^0.4.24;
+
+import "@aragon/os/contracts/acl/ACL.sol";
+import "@aragon/os/contracts/kernel/Kernel.sol";
+import "@aragon/os/contracts/factory/DAOFactory.sol";
+
+// You might think this file is a bit odd, but let me explain.
+// We only use for now those imported contracts in our tests, which
+// means Truffle will not compile them for us, because they are from
+// an external dependency.
+
+
+// solium-disable-next-line no-empty-blocks
+contract Spoof {
+  // ...
+}
diff --git a/apps/contributor/package-lock.json b/apps/contributor/package-lock.json
index efd8ceb..6fc5785 100644
--- a/apps/contributor/package-lock.json
+++ b/apps/contributor/package-lock.json
@@ -7751,6 +7751,7 @@
             "minipass": {
               "version": "2.3.5",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "safe-buffer": "^5.1.2",
                 "yallist": "^3.0.0"
@@ -7767,6 +7768,7 @@
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -7850,6 +7852,7 @@
             "once": {
               "version": "1.4.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -7925,7 +7928,8 @@
             },
             "safe-buffer": {
               "version": "5.1.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -8017,7 +8021,8 @@
             },
             "yallist": {
               "version": "3.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             }
           }
         },
@@ -8099,7 +8104,6 @@
               "version": "1.3.5",
               "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
               "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
-              "optional": true,
               "requires": {
                 "mime-types": "~2.1.18",
                 "negotiator": "0.6.1"
@@ -8135,14 +8139,12 @@
             "any-promise": {
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8=",
-              "optional": true
+              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
             },
             "array-flatten": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-              "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
-              "optional": true
+              "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
             },
             "asn1": {
               "version": "0.2.4",
@@ -8156,7 +8158,6 @@
               "version": "4.10.1",
               "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
               "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.0.0",
                 "inherits": "^2.0.1",
@@ -8850,8 +8851,7 @@
             "base64-js": {
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
-              "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
-              "optional": true
+              "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
             },
             "bcrypt-pbkdf": {
               "version": "1.0.2",
@@ -8893,7 +8893,6 @@
               "version": "1.2.2",
               "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
               "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
-              "optional": true,
               "requires": {
                 "readable-stream": "^2.3.5",
                 "safe-buffer": "^5.1.1"
@@ -8923,7 +8922,6 @@
               "version": "1.18.3",
               "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
               "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
-              "optional": true,
               "requires": {
                 "bytes": "3.0.0",
                 "content-type": "~1.0.4",
@@ -8941,7 +8939,6 @@
                   "version": "2.6.9",
                   "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
                   "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-                  "optional": true,
                   "requires": {
                     "ms": "2.0.0"
                   }
@@ -9002,7 +8999,6 @@
               "version": "4.0.1",
               "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
               "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.1.0",
                 "randombytes": "^2.0.1"
@@ -9065,7 +9061,6 @@
               "version": "5.2.1",
               "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
               "integrity": "sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==",
-              "optional": true,
               "requires": {
                 "base64-js": "^1.0.2",
                 "ieee754": "^1.1.4"
@@ -9075,7 +9070,6 @@
               "version": "1.2.0",
               "resolved": "https://registry.npmjs.org/buffer-alloc/-/buffer-alloc-1.2.0.tgz",
               "integrity": "sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==",
-              "optional": true,
               "requires": {
                 "buffer-alloc-unsafe": "^1.1.0",
                 "buffer-fill": "^1.0.0"
@@ -9084,8 +9078,7 @@
             "buffer-alloc-unsafe": {
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
-              "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg==",
-              "optional": true
+              "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg=="
             },
             "buffer-crc32": {
               "version": "0.2.13",
@@ -9096,8 +9089,7 @@
             "buffer-fill": {
               "version": "1.0.0",
               "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
-              "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw=",
-              "optional": true
+              "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw="
             },
             "buffer-from": {
               "version": "1.1.1",
@@ -9107,8 +9099,7 @@
             "buffer-to-arraybuffer": {
               "version": "0.0.5",
               "resolved": "https://registry.npmjs.org/buffer-to-arraybuffer/-/buffer-to-arraybuffer-0.0.5.tgz",
-              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo=",
-              "optional": true
+              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo="
             },
             "buffer-xor": {
               "version": "1.0.3",
@@ -9118,8 +9109,7 @@
             "bytes": {
               "version": "3.0.0",
               "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
-              "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
-              "optional": true
+              "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
             },
             "bytewise": {
               "version": "1.1.0",
@@ -9251,7 +9241,6 @@
               "version": "2.8.1",
               "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
               "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
-              "optional": true,
               "requires": {
                 "graceful-readlink": ">= 1.0.0"
               }
@@ -9275,14 +9264,12 @@
             "content-disposition": {
               "version": "0.5.2",
               "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
-              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
-              "optional": true
+              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
             },
             "content-type": {
               "version": "1.0.4",
               "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
-              "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
-              "optional": true
+              "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
             },
             "convert-source-map": {
               "version": "1.6.0",
@@ -9295,20 +9282,17 @@
             "cookie": {
               "version": "0.3.1",
               "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
-              "optional": true
+              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
             },
             "cookie-signature": {
               "version": "1.0.6",
               "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
-              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
-              "optional": true
+              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
             },
             "cookiejar": {
               "version": "2.1.2",
               "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
-              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==",
-              "optional": true
+              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA=="
             },
             "core-js": {
               "version": "2.6.5",
@@ -9324,7 +9308,6 @@
               "version": "2.8.5",
               "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
               "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
-              "optional": true,
               "requires": {
                 "object-assign": "^4",
                 "vary": "^1"
@@ -9417,8 +9400,7 @@
             "decode-uri-component": {
               "version": "0.2.0",
               "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-              "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
-              "optional": true
+              "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
             },
             "decompress": {
               "version": "4.2.0",
@@ -9448,7 +9430,6 @@
               "version": "3.3.0",
               "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
               "integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
-              "optional": true,
               "requires": {
                 "mimic-response": "^1.0.0"
               }
@@ -9457,7 +9438,6 @@
               "version": "4.1.1",
               "resolved": "https://registry.npmjs.org/decompress-tar/-/decompress-tar-4.1.1.tgz",
               "integrity": "sha512-JdJMaCrGpB5fESVyxwpCx4Jdj2AagLmv3y58Qy4GE6HMVjWz1FeVQk1Ct4Kye7PftcdOo/7U7UKzYBJgqnGeUQ==",
-              "optional": true,
               "requires": {
                 "file-type": "^5.2.0",
                 "is-stream": "^1.1.0",
@@ -9583,8 +9563,7 @@
             "depd": {
               "version": "1.1.2",
               "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
-              "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=",
-              "optional": true
+              "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
             },
             "des.js": {
               "version": "1.0.0",
@@ -9599,8 +9578,7 @@
             "destroy": {
               "version": "1.0.4",
               "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
-              "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=",
-              "optional": true
+              "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
             },
             "detect-indent": {
               "version": "4.0.0",
@@ -9639,8 +9617,7 @@
             "duplexer3": {
               "version": "0.1.4",
               "resolved": "https://registry.npmjs.org/duplexer3/-/duplexer3-0.1.4.tgz",
-              "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI=",
-              "optional": true
+              "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI="
             },
             "ecc-jsbn": {
               "version": "0.1.2",
@@ -9654,8 +9631,7 @@
             "ee-first": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
-              "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=",
-              "optional": true
+              "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
             },
             "electron-to-chromium": {
               "version": "1.3.113",
@@ -9679,8 +9655,7 @@
             "encodeurl": {
               "version": "1.0.2",
               "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
-              "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=",
-              "optional": true
+              "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
             },
             "encoding": {
               "version": "0.1.12",
@@ -9769,8 +9744,7 @@
             "escape-html": {
               "version": "1.0.3",
               "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
-              "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=",
-              "optional": true
+              "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
             },
             "escape-string-regexp": {
               "version": "1.0.5",
@@ -9785,8 +9759,7 @@
             "etag": {
               "version": "1.8.1",
               "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
-              "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=",
-              "optional": true
+              "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
             },
             "eth-block-tracker": {
               "version": "3.0.1",
@@ -9864,7 +9837,6 @@
               "version": "0.1.27",
               "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
               "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.11.6",
                 "elliptic": "^6.4.0",
@@ -10279,7 +10251,6 @@
               "version": "0.1.6",
               "resolved": "https://registry.npmjs.org/ethjs-unit/-/ethjs-unit-0.1.6.tgz",
               "integrity": "sha1-xmWSHkduh7ziqdWIpv4EBbLEFpk=",
-              "optional": true,
               "requires": {
                 "bn.js": "4.11.6",
                 "number-to-bn": "1.7.0"
@@ -10288,8 +10259,7 @@
                 "bn.js": {
                   "version": "4.11.6",
                   "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
                 }
               }
             },
@@ -10305,8 +10275,7 @@
             "eventemitter3": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-1.1.1.tgz",
-              "integrity": "sha1-R3hr2qCHyvext15zq8XH1UAVjNA=",
-              "optional": true
+              "integrity": "sha1-R3hr2qCHyvext15zq8XH1UAVjNA="
             },
             "events": {
               "version": "3.0.0",
@@ -10326,7 +10295,6 @@
               "version": "4.16.4",
               "resolved": "https://registry.npmjs.org/express/-/express-4.16.4.tgz",
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-              "optional": true,
               "requires": {
                 "accepts": "~1.3.5",
                 "array-flatten": "1.1.1",
@@ -10364,7 +10332,6 @@
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                   "resolved": "https://registry.npmjs.org/utf8/-/utf8-2.1.1.tgz",
-                  "integrity": "sha1-LgHbAvfY0JRPdxBPFgnrDDBM92g=",
-                  "optional": true
+                  "integrity": "sha1-LgHbAvfY0JRPdxBPFgnrDDBM92g="
                 }
               }
             },
@@ -13817,7 +13693,6 @@
               "version": "3.3.3",
               "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
               "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
-              "optional": true,
               "requires": {
                 "async-limiter": "~1.0.0",
                 "safe-buffer": "~5.1.0",
@@ -13839,7 +13714,6 @@
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.1.0.tgz",
               "integrity": "sha512-Y7qzEaR3FDtL3fP30k9wO/e+FBnBByZeybKOhASsGP30NIkRAAkKD/sCnLvgEfAIEC1rcmK7YG8f4oEnIrrWzA==",
-              "optional": true,
               "requires": {
                 "buffer-to-arraybuffer": "^0.0.5",
                 "object-assign": "^4.1.1",
@@ -13854,7 +13728,6 @@
               "version": "0.1.2",
               "resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.2.tgz",
               "integrity": "sha1-NDxE0e53JrhkgGloLQ+EDIO0Jh0=",
-              "optional": true,
               "requires": {
                 "xhr-request": "^1.0.1"
               }
@@ -13863,7 +13736,6 @@
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/xhr2-cookies/-/xhr2-cookies-1.1.0.tgz",
               "integrity": "sha1-fXdEnQmZGX8VXLc7I99yUF7YnUg=",
-              "optional": true,
               "requires": {
                 "cookiejar": "^2.1.1"
               }
@@ -23902,9 +23774,9 @@
       }
     },
     "@aragon/test-helpers": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-1.2.2.tgz",
-      "integrity": "sha512-NJcK2dg8v8rLIMiIYslDsYVoskjDA5V4Z0C+bo+WoMvjzwVjlELGHdLpEbxLVvd6V7zb0pWH/qtQP5dCsgoETw==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-2.0.0.tgz",
+      "integrity": "sha512-z7e5vF0cjXqI+NPtC5lPFhHp5fVJxRoJmO6nJi18/Lolt1duXxUM30/ckqJfq+eDamBzhPfYRs5/0aaDovXzfg==",
       "dev": true
     },
     "@resolver-engine/core": {
diff --git a/apps/contributor/package.json b/apps/contributor/package.json
index 5d5bdd3..46b6bbd 100644
--- a/apps/contributor/package.json
+++ b/apps/contributor/package.json
@@ -7,10 +7,10 @@
     "@aragon/cli": "^5.9.6"
   },
   "devDependencies": {
-    "@aragon/test-helpers": "^1.1.0",
     "eth-gas-reporter": "^0.2.0",
     "ganache-cli": "^6.4.3",
-    "solidity-coverage": "^0.5.11"
+    "solidity-coverage": "^0.5.11",
+    "@aragon/test-helpers": "^2.0.0"
   },
   "scripts": {
     "start": "npm run start:aragon:ipfs",
@@ -26,10 +26,7 @@
     "publish:minor": "aragon apm publish minor",
     "publish:major": "aragon apm publish major",
     "versions": "aragon apm versions",
-    "test": "TRUFFLE_TEST=true PORT=7545 npm run ganache-cli:test",
-    "test:gas": "GAS_REPORTER=true npm test",
-    "coverage": "SOLIDITY_COVERAGE=true npm run ganache-cli:test",
-    "ganache-cli:test": "./node_modules/@aragon/test-helpers/ganache-cli.sh"
+    "test": "aragon contracts test"
   },
   "keywords": []
 }
diff --git a/apps/contributor/test/app.js b/apps/contributor/test/app.js
deleted file mode 100644
index 9985ba6..0000000
--- a/apps/contributor/test/app.js
+++ /dev/null
@@ -1,5 +0,0 @@
-// const Contributor = artifacts.require('Contributor.sol');
-
-contract('Contributor', (_accounts) => {
-  it('should be tested');
-});
diff --git a/apps/contributor/test/contributor.js b/apps/contributor/test/contributor.js
new file mode 100644
index 0000000..f223d04
--- /dev/null
+++ b/apps/contributor/test/contributor.js
@@ -0,0 +1,170 @@
+const namehash = require('ethers').utils.namehash;
+
+// eslint-disable-next-line no-undef
+const Contributor = artifacts.require("Contributor.sol");
+
+// eslint-disable-next-line no-undef
+const getContract = name => artifacts.require(name);
+const { assertRevert } = require('@aragon/test-helpers/assertThrow');
+
+const ZERO_ADDR = '0x0000000000000000000000000000000000000000';
+
+contract('Contributor app', (accounts) => {
+  let kernelBase, aclBase, daoFactory, r, dao, acl, contributor;
+
+  const root = accounts[0];
+  const member1 = accounts[1];
+
+  // eslint-disable-next-line no-undef
+  before(async () => {
+    kernelBase = await getContract('Kernel').new(true); // petrify immediately
+    aclBase = await getContract('ACL').new();
+    daoFactory = await getContract('DAOFactory').new(kernelBase.address, aclBase.address, ZERO_ADDR);
+    r = await daoFactory.newDAO(root);
+    dao = getContract('Kernel').at(r.logs.filter(l => l.event == 'DeployDAO')[0].args.dao);
+    acl = getContract('ACL').at(await dao.acl());
+
+    //create dao mamnager permission for coin owner
+    await acl.createPermission(
+      root,
+      dao.address,
+      await dao.APP_MANAGER_ROLE(),
+      root,
+      { from: root }
+    );
+
+    //get new app instance from DAO
+    const receipt = await dao.newAppInstance(
+      '0x1234',
+      (await Contributor.new()).address,
+      0x0,
+      false,
+      { from: root }
+    );
+    contributor = Contributor.at(
+      receipt.logs.filter(l => l.event == 'NewAppProxy')[0].args.proxy
+    );
+
+    //apps id
+    let appsId = [];
+    appsId[0] = namehash("kredits-contribution");
+    appsId[1] = namehash("kredits-contributor");
+    appsId[2] = namehash("kredits-proposal");
+    appsId[3] = namehash("kredits-token");
+
+    //init contributor (app)
+    await contributor.initialize(root, appsId);
+
+    //create manage contributors role
+    await acl.createPermission(
+      root,
+      contributor.address,
+      await contributor.MANAGE_CONTRIBUTORS_ROLE(),
+      root,
+      { from: root }
+    );
+  
+  });
+
+  describe("Owner default permissions", async () => {
+    it('check owner is contributors manager', async () => {
+      let manageContributorPermission = await acl.hasPermission(root, contributor.address, await contributor.MANAGE_CONTRIBUTORS_ROLE());
+      // eslint-disable-next-line no-undef
+      assert.equal(manageContributorPermission, true);
+    });  
+  });
+
+  describe("Add contributor", async () => {
+    let account = root;
+    let hashDigest = '0x0';
+    let hashFunction = 0;
+    let hashSize = 0;
+
+    it("should revert when add contributor from an address that does not have permission", async () => {
+      return assertRevert(async () => {
+        await contributor.addContributor(account, hashDigest, hashFunction, hashSize, { from: member1});
+        'sender does not have permission';
+      });
+    });
+
+    it('add contributor', async () => {
+      let contributorCount = await contributor.coreContributorsCount();
+      await contributor.addContributor(account, hashDigest, hashFunction, hashSize);
+      // eslint-disable-next-line no-undef
+      assert.equal(await contributor.addressExists(account), true);
+      let contributorCountAfter = await contributor.coreContributorsCount();
+      // eslint-disable-next-line no-undef
+      assert.equal(await contributorCountAfter.toNumber(), parseInt(contributorCount)+1);
+    });
+
+    it("should revert when add contributor with an address that already exist", async () => {
+      return assertRevert(async () => {
+        await contributor.addContributor(account, hashDigest, hashFunction, hashSize, { from: member1});
+        'address already exist';
+      });
+    });
+  });
+
+  describe("Update contributor", async () => {
+    let id;
+    let oldAccount;
+    let newAccount;
+    let hashDigest;
+    let hashFunction;
+    let hashSize;
+
+    // eslint-disable-next-line no-undef
+    before(async () =>  {
+      id = await contributor.coreContributorsCount();
+      oldAccount = root;
+      newAccount = member1;
+      hashDigest = '0x1000000000000000000000000000000000000000000000000000000000000000';
+      hashFunction = 1;
+      hashSize = 1;
+    });
+
+    it('update contributor account', async () => {
+      await contributor.updateContributorAccount(id.toNumber(), oldAccount, newAccount);
+      let contributorId = await contributor.getContributorIdByAddress(oldAccount);
+      // eslint-disable-next-line no-undef
+      assert.equal(contributorId.toNumber(), 0);
+    });
+
+    it("should revert when update contributor account from address that does not have permission", async () => {
+      return assertRevert(async () => {
+        await contributor.updateContributorAccount(id.toNumber(), oldAccount, newAccount, {from: member1});
+        'sender does not have permission';
+      });
+    });
+
+    it("should revert when update contributor account that does not exist", async () => {
+      return assertRevert(async () => {
+        await contributor.updateContributorAccount(id.toNumber(), accounts[3], newAccount);
+        'contributor does not exist';
+      });
+    });
+
+    it("should revert when update contributor account with address(0)", async () => {
+      return assertRevert(async () => {
+        await contributor.updateContributorAccount(id.toNumber(), oldAccount, ZERO_ADDR);
+        'contributor does not exist';
+      });
+    });
+
+    it('update contributor profile hash', async () => {
+      await contributor.updateContributorProfileHash(id.toNumber(), hashDigest, hashFunction, hashSize);
+      let contributorProfile = await contributor.contributors(id.toNumber());
+      assert.equal(hashDigest, contributorProfile[1]);    // eslint-disable-line no-undef
+      assert.equal(hashFunction, contributorProfile[2].toNumber());   // eslint-disable-line no-undef
+      assert.equal(hashSize, contributorProfile[3].toNumber());   // eslint-disable-line no-undef
+    });
+
+    it("should revert when update contributor profile hash from address that does not have permission", async () => {
+      return assertRevert(async () => {
+        await contributor.updateContributorProfileHash(id.toNumber(), hashDigest, hashFunction, hashSize, {from: member1});
+        'sender does not have permission';
+      });
+    });
+
+  });
+});
diff --git a/apps/proposal/package-lock.json b/apps/proposal/package-lock.json
index 3b0a5de..40752ca 100644
--- a/apps/proposal/package-lock.json
+++ b/apps/proposal/package-lock.json
@@ -7751,6 +7751,7 @@
             "minipass": {
               "version": "2.3.5",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "safe-buffer": "^5.1.2",
                 "yallist": "^3.0.0"
@@ -7767,6 +7768,7 @@
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -7850,6 +7852,7 @@
             "once": {
               "version": "1.4.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -7925,7 +7928,8 @@
             },
             "safe-buffer": {
               "version": "5.1.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -8017,7 +8021,8 @@
             },
             "yallist": {
               "version": "3.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             }
           }
         },
@@ -8099,7 +8104,6 @@
               "version": "1.3.5",
               "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
               "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
-              "optional": true,
               "requires": {
                 "mime-types": "~2.1.18",
                 "negotiator": "0.6.1"
@@ -8135,14 +8139,12 @@
             "any-promise": {
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8=",
-              "optional": true
+              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
             },
             "array-flatten": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-              "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
-              "optional": true
+              "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
             },
             "asn1": {
               "version": "0.2.4",
@@ -8156,7 +8158,6 @@
               "version": "4.10.1",
               "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
               "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.0.0",
                 "inherits": "^2.0.1",
@@ -8850,8 +8851,7 @@
             "base64-js": {
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
-              "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
-              "optional": true
+              "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
             },
             "bcrypt-pbkdf": {
               "version": "1.0.2",
@@ -8893,7 +8893,6 @@
               "version": "1.2.2",
               "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
               "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
-              "optional": true,
               "requires": {
                 "readable-stream": "^2.3.5",
                 "safe-buffer": "^5.1.1"
@@ -8923,7 +8922,6 @@
               "version": "1.18.3",
               "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
               "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
-              "optional": true,
               "requires": {
                 "bytes": "3.0.0",
                 "content-type": "~1.0.4",
@@ -8941,7 +8939,6 @@
                   "version": "2.6.9",
                   "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
                   "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-                  "optional": true,
                   "requires": {
                     "ms": "2.0.0"
                   }
@@ -9002,7 +8999,6 @@
               "version": "4.0.1",
               "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
               "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
-              "optional": true,
               "requires": {
                 "bn.js": "^4.1.0",
                 "randombytes": "^2.0.1"
@@ -9065,7 +9061,6 @@
               "version": "5.2.1",
               "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
               "integrity": "sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==",
-              "optional": true,
               "requires": {
                 "base64-js": "^1.0.2",
                 "ieee754": "^1.1.4"
@@ -9075,7 +9070,6 @@
               "version": "1.2.0",
               "resolved": "https://registry.npmjs.org/buffer-alloc/-/buffer-alloc-1.2.0.tgz",
               "integrity": "sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==",
-              "optional": true,
               "requires": {
                 "buffer-alloc-unsafe": "^1.1.0",
                 "buffer-fill": "^1.0.0"
@@ -9084,8 +9078,7 @@
             "buffer-alloc-unsafe": {
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
-              "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg==",
-              "optional": true
+              "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg=="
             },
             "buffer-crc32": {
               "version": "0.2.13",
@@ -9096,8 +9089,7 @@
             "buffer-fill": {
               "version": "1.0.0",
               "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
-              "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw=",
-              "optional": true
+              "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw="
             },
             "buffer-from": {
               "version": "1.1.1",
@@ -9107,8 +9099,7 @@
             "buffer-to-arraybuffer": {
               "version": "0.0.5",
               "resolved": "https://registry.npmjs.org/buffer-to-arraybuffer/-/buffer-to-arraybuffer-0.0.5.tgz",
-              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo=",
-              "optional": true
+              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo="
             },
             "buffer-xor": {
               "version": "1.0.3",
@@ -9118,8 +9109,7 @@
             "bytes": {
               "version": "3.0.0",
               "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
-              "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
-              "optional": true
+              "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
             },
             "bytewise": {
               "version": "1.1.0",
@@ -9251,7 +9241,6 @@
               "version": "2.8.1",
               "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
               "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
-              "optional": true,
               "requires": {
                 "graceful-readlink": ">= 1.0.0"
               }
@@ -9275,14 +9264,12 @@
             "content-disposition": {
               "version": "0.5.2",
               "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
-              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
-              "optional": true
+              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
             },
             "content-type": {
               "version": "1.0.4",
               "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
-              "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
-              "optional": true
+              "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
             },
             "convert-source-map": {
               "version": "1.6.0",
@@ -9295,20 +9282,17 @@
             "cookie": {
               "version": "0.3.1",
               "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
-              "optional": true
+              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
             },
             "cookie-signature": {
               "version": "1.0.6",
               "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
-              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
-              "optional": true
+              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
             },
             "cookiejar": {
               "version": "2.1.2",
               "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
-              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==",
-              "optional": true
+              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA=="
             },
             "core-js": {
               "version": "2.6.5",
@@ -9324,7 +9308,6 @@
               "version": "2.8.5",
               "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
               "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
-              "optional": true,
               "requires": {
                 "object-assign": "^4",
                 "vary": "^1"
@@ -9417,8 +9400,7 @@
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@@ -13476,7 +13366,6 @@
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-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
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@@ -13559,7 +13447,6 @@
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@@ -13568,8 +13455,7 @@
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-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
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@@ -13577,7 +13463,6 @@
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@@ -13590,7 +13475,6 @@
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@@ -13672,7 +13556,6 @@
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@@ -13682,7 +13565,6 @@
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@@ -13693,7 +13575,6 @@
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@@ -13704,7 +13585,6 @@
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@@ -13712,7 +13592,6 @@
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                   "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
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@@ -13738,7 +13617,6 @@
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-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
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+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
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@@ -13817,7 +13693,6 @@
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@@ -13839,7 +13714,6 @@
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@@ -13854,7 +13728,6 @@
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@@ -23902,9 +23774,9 @@
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-      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-1.2.2.tgz",
-      "integrity": "sha512-NJcK2dg8v8rLIMiIYslDsYVoskjDA5V4Z0C+bo+WoMvjzwVjlELGHdLpEbxLVvd6V7zb0pWH/qtQP5dCsgoETw==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-2.0.0.tgz",
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diff --git a/apps/proposal/package.json b/apps/proposal/package.json
index eabedc4..19a863d 100644
--- a/apps/proposal/package.json
+++ b/apps/proposal/package.json
@@ -7,7 +7,7 @@
     "@aragon/cli": "^5.9.6"
   },
   "devDependencies": {
-    "@aragon/test-helpers": "^1.1.0",
+    "@aragon/test-helpers": "^2.0.0",
     "eth-gas-reporter": "^0.2.0",
     "ganache-cli": "^6.4.3",
     "solidity-coverage": "^0.5.11"
@@ -26,10 +26,7 @@
     "publish:minor": "aragon apm publish minor",
     "publish:major": "aragon apm publish major",
     "versions": "aragon apm versions",
-    "test": "TRUFFLE_TEST=true PORT=7545 npm run ganache-cli:test",
-    "test:gas": "GAS_REPORTER=true npm test",
-    "coverage": "SOLIDITY_COVERAGE=true npm run ganache-cli:test",
-    "ganache-cli:test": "./node_modules/@aragon/test-helpers/ganache-cli.sh"
+    "test": "aragon contracts test"
   },
   "keywords": []
 }
diff --git a/apps/token/package-lock.json b/apps/token/package-lock.json
index 9bc5dfa..99067d2 100644
--- a/apps/token/package-lock.json
+++ b/apps/token/package-lock.json
@@ -7751,6 +7751,7 @@
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@@ -7767,6 +7768,7 @@
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+              "optional": true,
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@@ -7850,6 +7852,7 @@
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+              "optional": true,
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@@ -7925,7 +7928,8 @@
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@@ -8017,7 +8021,8 @@
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+              "bundled": true,
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@@ -8135,14 +8139,12 @@
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-              "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8=",
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@@ -9107,8 +9099,7 @@
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-              "optional": true
+              "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo="
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@@ -9118,8 +9109,7 @@
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@@ -9275,14 +9264,12 @@
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-              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
-              "optional": true
+              "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
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@@ -9295,20 +9282,17 @@
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-              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
-              "optional": true
+              "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
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-              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
-              "optional": true
+              "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
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+              "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA=="
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               "resolved": "https://registry.npmjs.org/web3-core-requestmanager/-/web3-core-requestmanager-1.0.0-beta.35.tgz",
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-              "optional": true,
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                 "web3-core-helpers": "1.0.0-beta.35",
@@ -13445,7 +13336,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-core-subscriptions/-/web3-core-subscriptions-1.0.0-beta.35.tgz",
               "integrity": "sha512-gXzLrWvcGkGiWq1y33Z4Y80XI8XMrwowiQJkrPSjQ81K5PBKquOGwcMffLaKcwdmEy/NpsOXDeFo3eLE1Ghvvw==",
-              "optional": true,
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                 "underscore": "1.8.3",
@@ -13476,7 +13366,6 @@
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               "resolved": "https://registry.npmjs.org/web3-eth-abi/-/web3-eth-abi-1.0.0-beta.35.tgz",
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-              "optional": true,
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                 "underscore": "1.8.3",
@@ -13487,8 +13376,7 @@
                 "bn.js": {
                   "version": "4.11.6",
                   "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
                 }
               }
             },
@@ -13559,7 +13447,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-eth-iban/-/web3-eth-iban-1.0.0-beta.35.tgz",
               "integrity": "sha512-H5wkcNcAIc+h/WoDIKv7ZYmrM2Xqu3O7jBQl1IWo73EDVQji+AoB2i3J8tuwI1yZRInRwrfpI3Zuwuf54hXHmQ==",
-              "optional": true,
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                 "web3-utils": "1.0.0-beta.35"
@@ -13568,8 +13455,7 @@
                 "bn.js": {
                   "version": "4.11.6",
                   "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
                 }
               }
             },
@@ -13577,7 +13463,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-eth-personal/-/web3-eth-personal-1.0.0-beta.35.tgz",
               "integrity": "sha512-AcM9nnlxu7ZRRxPvkrFB9eLxMM4A2cPfj2aCg21Wb2EpMnhR+b/O1cT33k7ApRowoMpM+T9M8vx2oPNwXfaCOQ==",
-              "optional": true,
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                 "web3-core-helpers": "1.0.0-beta.35",
@@ -13590,7 +13475,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-net/-/web3-net-1.0.0-beta.35.tgz",
               "integrity": "sha512-bbwaQ/KohGjIJ6HAKbZ6KrklCAaG6/B7hIbAbVLSFLxF+Yz9lmAgQYaDInpidpC/NLb3WOmcbRF+P77J4qMVIA==",
-              "optional": true,
               "requires": {
                 "web3-core": "1.0.0-beta.35",
                 "web3-core-method": "1.0.0-beta.35",
@@ -13672,7 +13556,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-providers-http/-/web3-providers-http-1.0.0-beta.35.tgz",
               "integrity": "sha512-DcIMFq52Fb08UpWyZ3ZlES6NsNqJnco4hBS/Ej6eOcASfuUayPI+GLkYVZsnF3cBYqlH+DOKuArcKSuIxK7jIA==",
-              "optional": true,
               "requires": {
                 "web3-core-helpers": "1.0.0-beta.35",
                 "xhr2-cookies": "1.1.0"
@@ -13682,7 +13565,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-providers-ipc/-/web3-providers-ipc-1.0.0-beta.35.tgz",
               "integrity": "sha512-iB0FG0HcpUnayfa8pn4guqEQ4Y1nrroi/jffdtQgFkrNt0sD3fMSwwC0AbmECqj3tDLl0e1slBR0RENll+ZF0g==",
-              "optional": true,
               "requires": {
                 "oboe": "2.1.3",
                 "underscore": "1.8.3",
@@ -13693,7 +13575,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-providers-ws/-/web3-providers-ws-1.0.0-beta.35.tgz",
               "integrity": "sha512-Cx64NgDStynKaUGDIIOfaCd0fZusL8h5avKTkdTjUu2aHhFJhZoVBGVLhoDtUaqZGWIZGcBJOoVf2JkGUOjDRQ==",
-              "optional": true,
               "requires": {
                 "underscore": "1.8.3",
                 "web3-core-helpers": "1.0.0-beta.35",
@@ -13704,7 +13585,6 @@
                   "version": "2.6.9",
                   "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
                   "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-                  "optional": true,
                   "requires": {
                     "ms": "2.0.0"
                   }
@@ -13712,7 +13592,6 @@
                 "websocket": {
                   "version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
                   "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
-                  "optional": true,
                   "requires": {
                     "debug": "^2.2.0",
                     "nan": "^2.3.3",
@@ -13738,7 +13617,6 @@
               "version": "1.0.0-beta.35",
               "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.0.0-beta.35.tgz",
               "integrity": "sha512-Dq6f0SOKj3BDFRgOPnE6ALbzBDCKVIW8mKWVf7tGVhTDHf+wQaWwQSC3aArFSqdExB75BPBPyDpuMTNszhljpA==",
-              "optional": true,
               "requires": {
                 "bn.js": "4.11.6",
                 "eth-lib": "0.1.27",
@@ -13752,14 +13630,12 @@
                 "bn.js": {
                   "version": "4.11.6",
                   "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
-                  "optional": true
+                  "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
                 },
                 "utf8": {
                   "version": "2.1.1",
                   "resolved": "https://registry.npmjs.org/utf8/-/utf8-2.1.1.tgz",
-                  "integrity": "sha1-LgHbAvfY0JRPdxBPFgnrDDBM92g=",
-                  "optional": true
+                  "integrity": "sha1-LgHbAvfY0JRPdxBPFgnrDDBM92g="
                 }
               }
             },
@@ -13817,7 +13693,6 @@
               "version": "3.3.3",
               "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
               "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
-              "optional": true,
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                 "async-limiter": "~1.0.0",
                 "safe-buffer": "~5.1.0",
@@ -13839,7 +13714,6 @@
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.1.0.tgz",
               "integrity": "sha512-Y7qzEaR3FDtL3fP30k9wO/e+FBnBByZeybKOhASsGP30NIkRAAkKD/sCnLvgEfAIEC1rcmK7YG8f4oEnIrrWzA==",
-              "optional": true,
               "requires": {
                 "buffer-to-arraybuffer": "^0.0.5",
                 "object-assign": "^4.1.1",
@@ -13854,7 +13728,6 @@
               "version": "0.1.2",
               "resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.2.tgz",
               "integrity": "sha1-NDxE0e53JrhkgGloLQ+EDIO0Jh0=",
-              "optional": true,
               "requires": {
                 "xhr-request": "^1.0.1"
               }
@@ -13863,7 +13736,6 @@
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/xhr2-cookies/-/xhr2-cookies-1.1.0.tgz",
               "integrity": "sha1-fXdEnQmZGX8VXLc7I99yUF7YnUg=",
-              "optional": true,
               "requires": {
                 "cookiejar": "^2.1.1"
               }
@@ -23902,9 +23774,9 @@
       }
     },
     "@aragon/test-helpers": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-1.2.2.tgz",
-      "integrity": "sha512-NJcK2dg8v8rLIMiIYslDsYVoskjDA5V4Z0C+bo+WoMvjzwVjlELGHdLpEbxLVvd6V7zb0pWH/qtQP5dCsgoETw==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@aragon/test-helpers/-/test-helpers-2.0.0.tgz",
+      "integrity": "sha512-z7e5vF0cjXqI+NPtC5lPFhHp5fVJxRoJmO6nJi18/Lolt1duXxUM30/ckqJfq+eDamBzhPfYRs5/0aaDovXzfg==",
       "dev": true
     },
     "@resolver-engine/core": {
diff --git a/apps/token/package.json b/apps/token/package.json
index a59a720..b697413 100644
--- a/apps/token/package.json
+++ b/apps/token/package.json
@@ -7,7 +7,7 @@
     "@aragon/cli": "^5.9.6"
   },
   "devDependencies": {
-    "@aragon/test-helpers": "^1.1.0",
+    "@aragon/test-helpers": "^2.0.0",
     "eth-gas-reporter": "^0.2.0",
     "ganache-cli": "^6.4.3",
     "solidity-coverage": "^0.5.11"
@@ -26,10 +26,7 @@
     "publish:minor": "aragon apm publish minor",
     "publish:major": "aragon apm publish major",
     "versions": "aragon apm versions",
-    "test": "TRUFFLE_TEST=true PORT=7545 npm run ganache-cli:test",
-    "test:gas": "GAS_REPORTER=true npm test",
-    "coverage": "SOLIDITY_COVERAGE=true npm run ganache-cli:test",
-    "ganache-cli:test": "./node_modules/@aragon/test-helpers/ganache-cli.sh"
+    "test": "aragon contracts test"
   },
   "keywords": []
 }
diff --git a/lib/serializers/contributor.js b/lib/serializers/contributor.js
index 71afa31..dc9c708 100644
--- a/lib/serializers/contributor.js
+++ b/lib/serializers/contributor.js
@@ -13,7 +13,7 @@ class Contributor {
     Object.keys(attrs).forEach(a => this[a] = attrs[a]);
   }
 
- /**
+  /**
   * Serialize object to JSON
   *
   * @method
diff --git a/package-lock.json b/package-lock.json
index 98fc83b..86a98fa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -668,7 +668,7 @@
               "requires": {
                 "underscore": "1.8.3",
                 "web3-core-helpers": "1.0.0-beta.33",
-                "websocket": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible"
+                "websocket": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2"
               }
             },
             "web3-shh": {
@@ -6567,7 +6567,7 @@
           "resolved": "https://registry.npmjs.org/eth-sig-util/-/eth-sig-util-1.4.2.tgz",
           "integrity": "sha1-jZWCAsftuq6Dlwf7pvCf8ydgYhA=",
           "requires": {
-            "ethereumjs-abi": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
+            "ethereumjs-abi": "git+https://github.com/ethereumjs/ethereumjs-abi.git#8431eab7b3384e65e8126a4602520b78031666fb",
             "ethereumjs-util": "^5.1.1"
           },
           "dependencies": {
@@ -8300,7 +8300,6 @@
               "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
               "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "mime-types": "~2.1.18",
                 "negotiator": "0.6.1"
@@ -8341,15 +8340,13 @@
               "version": "1.3.0",
               "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
               "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "array-flatten": {
               "version": "1.1.1",
               "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
               "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "asn1": {
               "version": "0.2.4",
@@ -8365,7 +8362,6 @@
               "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
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               "dev": true,
-              "optional": true,
               "requires": {
                 "bn.js": "^4.0.0",
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@@ -9131,8 +9127,7 @@
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               "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
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-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "bcrypt-pbkdf": {
               "version": "1.0.2",
@@ -9179,7 +9174,6 @@
               "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
               "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
               "dev": true,
-              "optional": true,
               "requires": {
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                 "safe-buffer": "^5.1.1"
@@ -9213,7 +9207,6 @@
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               "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
               "dev": true,
-              "optional": true,
               "requires": {
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@@ -9232,7 +9225,6 @@
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                   "dev": true,
-                  "optional": true,
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                   }
@@ -9299,7 +9291,6 @@
               "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
               "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
               "dev": true,
-              "optional": true,
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                 "randombytes": "^2.0.1"
@@ -9368,7 +9359,6 @@
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               "dev": true,
-              "optional": true,
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@@ -9379,7 +9369,6 @@
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               "integrity": "sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==",
               "dev": true,
-              "optional": true,
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                 "buffer-alloc-unsafe": "^1.1.0",
                 "buffer-fill": "^1.0.0"
@@ -9389,8 +9378,7 @@
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               "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
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-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "buffer-crc32": {
               "version": "0.2.13",
@@ -9403,8 +9391,7 @@
               "version": "1.0.0",
               "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
               "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "buffer-from": {
               "version": "1.1.1",
@@ -9416,8 +9403,7 @@
               "version": "0.0.5",
               "resolved": "https://registry.npmjs.org/buffer-to-arraybuffer/-/buffer-to-arraybuffer-0.0.5.tgz",
               "integrity": "sha1-YGSkD6dutDxyOrqe+PbhIW0QURo=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "buffer-xor": {
               "version": "1.0.3",
@@ -9429,8 +9415,7 @@
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               "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "bytewise": {
               "version": "1.1.0",
@@ -9579,7 +9564,6 @@
               "resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
               "integrity": "sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "graceful-readlink": ">= 1.0.0"
               }
@@ -9606,15 +9590,13 @@
               "version": "0.5.2",
               "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
               "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "content-type": {
               "version": "1.0.4",
               "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
               "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "convert-source-map": {
               "version": "1.6.0",
@@ -9629,22 +9611,19 @@
               "version": "0.3.1",
               "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
               "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "cookie-signature": {
               "version": "1.0.6",
               "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
               "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "cookiejar": {
               "version": "2.1.2",
               "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
               "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "core-js": {
               "version": "2.6.5",
@@ -9663,7 +9642,6 @@
               "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
               "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
               "dev": true,
-              "optional": true,
               "requires": {
                 "object-assign": "^4",
                 "vary": "^1"
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+        "async": "^2.6.1",
+        "bs58": "^4.0.1",
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-        "multihashing-async": "~0.7.0",
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+        "multihashing-async": "~0.5.1",
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+        "pull-traverse": "^1.0.3",
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@@ -28301,11 +28162,6 @@
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@@ -28329,11 +28185,6 @@
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@@ -28388,6 +28239,19 @@
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+      },
+      "dependencies": {
+        "cids": {
+          "version": "0.7.1",
+          "resolved": "https://registry.npmjs.org/cids/-/cids-0.7.1.tgz",
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+          "requires": {
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+            "multibase": "~0.6.0",
+            "multicodec": "~0.5.1",
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+          }
+        }
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@@ -28410,9 +28274,9 @@
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+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
+      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ="
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@@ -28474,6 +28338,18 @@
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         "whatwg-fetch": ">=0.10.0"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.3.tgz",
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+          "dev": true,
+          "requires": {
+            "encoding": "^0.1.11",
+            "is-stream": "^1.0.1"
+          }
+        }
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@@ -28647,11 +28523,6 @@
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@@ -28822,38 +28693,19 @@
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-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/libp2p-crypto-secp256k1/-/libp2p-crypto-secp256k1-0.3.0.tgz",
-      "integrity": "sha512-+rF3S5p2pzS4JLDwVE6gLWZeaKkpl4NkYwG+0knV6ot29UcRSb73OyCWl07r1h5+g9E3KZC3wpsu+RIK5w8zQA==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/libp2p-crypto-secp256k1/-/libp2p-crypto-secp256k1-0.3.1.tgz",
+      "integrity": "sha512-evrfK/CeUSd/lcELUdDruyPBvxDmLairth75S32OLl3H+++2m2fV24JEtxzdFS9JH3xEFw0h6JFO8DBa1bP9dA==",
       "requires": {
-        "async": "^2.6.1",
+        "async": "^2.6.2",
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-        "multihashing-async": "~0.5.1",
+        "multihashing-async": "~0.6.0",
         "nodeify": "^1.0.1",
         "safe-buffer": "^5.1.2",
-        "secp256k1": "^3.6.1"
+        "secp256k1": "^3.6.2"
       },
       "dependencies": {
         "js-sha3": {
@@ -28862,9 +28714,9 @@
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+          "version": "0.6.0",
+          "resolved": "https://registry.npmjs.org/multihashing-async/-/multihashing-async-0.6.0.tgz",
+          "integrity": "sha512-Qv8pgg99Lewc191A5nlXy0bSd2amfqlafNJZmarU6Sj7MZVjpR94SCxQjf4DwPtgWZkiLqsjUQBXA2RSq+hYyA==",
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             "js-sha3": "~0.8.0",
@@ -29181,33 +29033,32 @@
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-      "version": "0.5.3",
-      "resolved": "https://registry.npmjs.org/multicodec/-/multicodec-0.5.3.tgz",
-      "integrity": "sha512-TUId9mavSh7q4ui5nUYiC0U10XVrMhsoMLPoG6nAAaFt2GKqZKK3aB2AeFk58aqEnLhmTSdRkmNrlty4jjOxzg==",
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/multicodec/-/multicodec-0.5.4.tgz",
+      "integrity": "sha512-0lPLiZ58b2jyXylx2qgda9/6N0YCNIpBxRsZ8sxYayVjEKh58XyNN74VTTQOR/ZCQFgbj0CsqfyRpEDPPlOMkw==",
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     "multihashes": {
-      "version": "0.4.14",
-      "resolved": "https://registry.npmjs.org/multihashes/-/multihashes-0.4.14.tgz",
-      "integrity": "sha512-V/g/EIN6nALXfS/xHUAgtfPP3mn3sPIF/i9beuGKf25QXS2QZYCpeVJbDPEannkz32B2fihzCe2D/KMrbcmefg==",
+      "version": "0.4.15",
+      "resolved": "https://registry.npmjs.org/multihashes/-/multihashes-0.4.15.tgz",
+      "integrity": "sha512-G/Smj1GWqw1RQP3dRuRRPe3oyLqvPqUaEDIaoi7JF7Loxl4WAWvhJNk84oyDEodSucv0MmSW/ZT0RKUrsIFD3g==",
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         "bs58": "^4.0.1",
         "varint": "^5.0.0"
       }
     },
     "multihashing-async": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/multihashing-async/-/multihashing-async-0.7.0.tgz",
-      "integrity": "sha512-SCbfl3f+DzJh+/5piukga9ofIOxwfT05t8R4jfzZIJ88YE9zU9+l3K2X+XB19MYyxqvyK9UJRNWbmQpZqQlbRA==",
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/multihashing-async/-/multihashing-async-0.5.2.tgz",
+      "integrity": "sha512-mmyG6M/FKxrpBh9xQDUvuJ7BbqT93ZeEeH5X6LeMYKoYshYLr9BDdCsvDtZvn+Egf+/Xi+aOznrWL4vp3s+p0Q==",
       "requires": {
         "blakejs": "^1.1.0",
-        "buffer": "^5.2.1",
-        "err-code": "^1.1.2",
         "js-sha3": "~0.8.0",
         "multihashes": "~0.4.13",
-        "murmurhash3js-revisited": "^3.0.0"
+        "murmurhash3js": "^3.0.1",
+        "nodeify": "^1.0.1"
       },
       "dependencies": {
         "js-sha3": {
@@ -29222,11 +29073,6 @@
       "resolved": "https://registry.npmjs.org/murmurhash3js/-/murmurhash3js-3.0.1.tgz",
       "integrity": "sha1-Ppg+W0fCoG9DpxMXTn5DXKBEuZg="
     },
-    "murmurhash3js-revisited": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/murmurhash3js-revisited/-/murmurhash3js-revisited-3.0.0.tgz",
-      "integrity": "sha512-/sF3ee6zvScXMb1XFJ8gDsSnY+X8PbOyjIuBhtgis10W2Jx4ZjIhikUCIF9c4gpJxVnQIsPAFrSwTCuAjicP6g=="
-    },
     "mute-stream": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz",
@@ -29261,22 +29107,9 @@
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     },
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-      "version": "1.7.3",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.3.tgz",
-      "integrity": "sha512-NhZ4CsKx7cYm2vSrBAr2PvFOe6sWDf0UYLRqA6svUYg7+/TSfVAu49jYC4BvQ4Sms9SZgdqGBgroqfDhJdTyKQ==",
-      "dev": true,
-      "requires": {
-        "encoding": "^0.1.11",
-        "is-stream": "^1.0.1"
-      },
-      "dependencies": {
-        "is-stream": {
-          "version": "1.1.0",
-          "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
-          "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
-          "dev": true
-        }
-      }
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
+      "integrity": "sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA=="
     },
     "node-forge": {
       "version": "0.7.6",
@@ -29540,14 +29373,21 @@
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     },
     "peer-id": {
-      "version": "0.12.2",
-      "resolved": "https://registry.npmjs.org/peer-id/-/peer-id-0.12.2.tgz",
-      "integrity": "sha512-pked3yPLcOcprH21OnYbJAzk9OgI/TDEqjJ0IfRJSVB/61ZyqU5VKO7cw7hul+YD8nTD79wM79xFRWN3f6otNg==",
+      "version": "0.12.3",
+      "resolved": "https://registry.npmjs.org/peer-id/-/peer-id-0.12.3.tgz",
+      "integrity": "sha512-rSpKw1lL0jL2hu0FO1IywmMTHLchiUO8/jkxe14d/TWSKLjlqhymzl9W6oMfmTZT5cLy99Tq3dRIBjdSaR4Flg==",
       "requires": {
-        "async": "^2.6.1",
+        "async": "^3.0.1",
         "class-is": "^1.1.0",
-        "libp2p-crypto": "~0.16.0",
-        "multihashes": "~0.4.13"
+        "libp2p-crypto": "~0.16.1",
+        "multihashes": "~0.4.15"
+      },
+      "dependencies": {
+        "async": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/async/-/async-3.1.0.tgz",
+          "integrity": "sha512-4vx/aaY6j/j3Lw3fbCHNWP0pPaTCew3F6F3hYyl/tHs/ndmV1q7NW9T5yuJ2XAGwdQrP+6Wu20x06U4APo/iQQ=="
+        }
       }
     },
     "peer-info": {
@@ -29715,9 +29555,9 @@
       "integrity": "sha512-/An3KE7mVjZCqNhZsr22k1Tx8MACnUnHZZNPSJ0S62td8JtYr/AiRG42Vz7Syu31SoTLUzVIe61jtT/pNdjVYA=="
     },
     "pull-stream": {
-      "version": "3.6.12",
-      "resolved": "https://registry.npmjs.org/pull-stream/-/pull-stream-3.6.12.tgz",
-      "integrity": "sha512-+LO1XIVyTMmeoH26UHznpgrgX2npTVYccTkMpgk/EyiQjFt1FmoNm+w+/zMLuz9U3bpvT5sSUicMKEe/2JjgEA=="
+      "version": "3.6.13",
+      "resolved": "https://registry.npmjs.org/pull-stream/-/pull-stream-3.6.13.tgz",
+      "integrity": "sha512-enbnbnO+czsPuCq9s9HTTzDzzVQD5TSe60aO3nBioeJ9mevh8RzE4Hxbujo9TReg1fJlmNEL8uyQTUgn8+rSHg=="
     },
     "pull-to-stream": {
       "version": "0.1.1",
@@ -29727,6 +29567,11 @@
         "readable-stream": "^3.1.1"
       }
     },
+    "pull-traverse": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/pull-traverse/-/pull-traverse-1.0.3.tgz",
+      "integrity": "sha1-dPtde+f6a9enjpeTPhmbeUWGaTg="
+    },
     "pump": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
@@ -30641,6 +30486,11 @@
         }
       }
     },
+    "traverse": {
+      "version": "0.6.6",
+      "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.6.6.tgz",
+      "integrity": "sha1-y99WD9e5r2MlAv7UD5GMFX6pcTc="
+    },
     "trim-right": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
@@ -30739,7 +30589,7 @@
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           "dev": true,
           "requires": {
-            "bignumber.js": "git+https://github.com/frozeman/bignumber.js-nolookahead.git",
+            "bignumber.js": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934",
             "crypto-js": "^3.1.4",
             "utf8": "^2.1.1",
             "xhr2-cookies": "^1.1.0",
@@ -30966,7 +30816,7 @@
           "integrity": "sha1-pFVBdc1GKUMDWx8dOUMvdBxrYBk=",
           "dev": true,
           "requires": {
-            "bignumber.js": "git+https://github.com/debris/bignumber.js.git#master",
+            "bignumber.js": "git+https://github.com/debris/bignumber.js.git#c7a38de919ed75e6fb6ba38051986e294b328df9",
             "crypto-js": "^3.1.4",
             "utf8": "^2.1.1",
             "xmlhttprequest": "*"
@@ -31253,4 +31103,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 2132965..dea245f 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "lint:contracts": "solhint \"contracts/**/*.sol\" \"apps/*/contracts/**/*.sol\"",
     "lint:contract-tests": "eslint apps/*/test",
     "lint:wrapper": "eslint lib/",
+    "test": "npm run test:token && npm run test:contributor && npm run test:contribution && npm run test:proposal",
     "test:token": "cd apps/token && npm run test",
     "test:contributor": "cd apps/contributor && npm run test",
     "test:contribution": "cd apps/contribution && npm run test",