diff --git a/app/models/answer.rb b/app/models/answer.rb
index 76aeffb0..587db426 100644
--- a/app/models/answer.rb
+++ b/app/models/answer.rb
@@ -8,7 +8,11 @@ class Answer < ApplicationRecord
   has_many :subscriptions, dependent: :destroy
   has_many :comment_smiles, through: :comments, source: :smiles
 
+  # rubocop:disable Rails/UniqueValidationWithoutIndex
+  # This cop is disabled here because there already are questions with
+  # multiple answers. Adding an index would break things database-side
   validates :question_id, uniqueness: { scope: :user_id }
+  # rubocop:enable Rails/UniqueValidationWithoutIndex
 
   # rubocop:disable Rails/SkipsModelValidations
   after_create do
diff --git a/spec/integration/answer_uniqueness_spec.rb b/spec/integration/answer_uniqueness_spec.rb
index c305e361..c1f42500 100644
--- a/spec/integration/answer_uniqueness_spec.rb
+++ b/spec/integration/answer_uniqueness_spec.rb
@@ -9,6 +9,6 @@ describe "Answer uniqueness" do
   subject { 2.times { user.answer(question, "random") } }
 
   it "does not allow answering the same question twice" do
-    expect{ subject }.to raise_error(ActiveRecord::RecordInvalid)
+    expect { subject }.to raise_error(ActiveRecord::RecordInvalid)
   end
 end