1 files changed, 8 insertions, 0 deletions
diff --git a/spec/lib/gitlab/diff/file_collection/commit_spec.rb b/spec/lib/gitlab/diff/file_collection/commit_spec.rb
index 3d995b36b6f..cfb5f50edbe 100644
--- a/spec/lib/gitlab/diff/file_collection/commit_spec.rb
+++ b/spec/lib/gitlab/diff/file_collection/commit_spec.rb
@@ -75,4 +75,12 @@ RSpec.describe Gitlab::Diff::FileCollection::Commit do
       ]
     end
   end
+
+  describe '#cache_key' do
+    subject(:cache_key) { described_class.new(diffable, diff_options: nil).cache_key }
+
+    it 'returns with the commit id' do
+      expect(cache_key).to eq ['commit', diffable.id]
+    end
+  end
 end