config/environments/test.rb

@@ -43,4 +43,10 @@ Rails.application.configure do
 
   # Raises error for missing translations.
   # config.action_view.raise_on_missing_translations = true
+
+  config.action_mailer.default_url_options = {
+    host: "accounts.kosmos.org",
+    protocol: "https",
+    from: "accounts@kosmos.org"
+  }
 end