1 files changed, 6 insertions, 0 deletions
diff --git a/spec/rubocop/cop/background_migration/feature_category_spec.rb b/spec/rubocop/cop/background_migration/feature_category_spec.rb
index 1d1b6cfad5a..12794de4f38 100644
--- a/spec/rubocop/cop/background_migration/feature_category_spec.rb
+++ b/spec/rubocop/cop/background_migration/feature_category_spec.rb
@@ -66,4 +66,10 @@ RSpec.describe RuboCop::Cop::BackgroundMigration::FeatureCategory, feature_categ
       RUBY
     end
   end
+
+  describe '#external_dependency_checksum' do
+    it 'returns a SHA256 digest used by RuboCop to invalid cache' do
+      expect(cop.external_dependency_checksum).to match(/^\h{64}$/)
+    end
+  end
 end