Fix Factories

spec/factories/user_exercise_feedback.rb

@@ -2,6 +2,7 @@ FactoryBot.define do
   factory :user_exercise_feedback, class: UserExerciseFeedback do
     created_by_external_user
     feedback_text 'Most suitable exercise ever'
+    association :exercise, factory: :math
   end
 
 end

test/factories/error_template_attributes.rb

@@ -1,6 +1,5 @@
 FactoryBot.define do
   factory :error_template_attribute do
-    error_template nil
     key "MyString"
     regex "MyString"
   end