diff --git a/tests/spec/setup_association_spec.rb b/tests/spec/setup_association_spec.rb
index 93870da..644ddc3 100644
--- a/tests/spec/setup_association_spec.rb
+++ b/tests/spec/setup_association_spec.rb
@@ -11,7 +11,7 @@ module Impressionist
       # expects attr_accessible to return true
       # and pass 12 arguments
       mock.
-        expect(:attr_accessible, true) do |*args|
+        expect(:attr_accessible, true) do |args|
           args.size == 12
         end
 
diff --git a/tests/test_app/config/environments/development.rb b/tests/test_app/config/environments/development.rb
index c69665e..b5306b3 100644
--- a/tests/test_app/config/environments/development.rb
+++ b/tests/test_app/config/environments/development.rb
@@ -23,7 +23,7 @@ TestApp::Application.configure do
   config.action_dispatch.best_standards_support = :builtin
 
   # Raise exception on mass assignment protection for Active Record models
-  # config.active_record.mass_assignment_sanitizer = :strict
+  config.active_record.mass_assignment_sanitizer = :strict
 
   # Log the query plan for queries taking more than this (works
   # with SQLite, MySQL, and PostgreSQL)
diff --git a/tests/test_app/config/environments/test.rb b/tests/test_app/config/environments/test.rb
index 6eb922c..21ec8e4 100644
--- a/tests/test_app/config/environments/test.rb
+++ b/tests/test_app/config/environments/test.rb
@@ -30,7 +30,7 @@ TestApp::Application.configure do
   config.action_mailer.delivery_method = :test
 
   # Raise exception on mass assignment protection for Active Record models
-  # config.active_record.mass_assignment_sanitizer = :strict
+  config.active_record.mass_assignment_sanitizer = :strict
 
   # Print deprecation notices to the stderr
   config.active_support.deprecation = :stderr