diff --git a/test/fixtures/cookbooks/wrapper/attributes/default.rb b/test/fixtures/cookbooks/wrapper/attributes/default.rb
index d9cc166..62a1367 100644
--- a/test/fixtures/cookbooks/wrapper/attributes/default.rb
+++ b/test/fixtures/cookbooks/wrapper/attributes/default.rb
@@ -2,3 +2,4 @@ default['postfix']['main']['smtp_sasl_auth_enable'] = 'yes'
 default['postfix']['main']['relayhost'] = 'please'
 default['postfix']['sasl']['smtp_sasl_user_name'] = 'keep'
 default['postfix']['sasl']['smtp_sasl_passwd'] = 'us'
+default['postfix']['sender_canonical_map_entries'] = {}