diff --git a/spec/serializers/merge_request_diff_entity_spec.rb b/spec/serializers/merge_request_diff_entity_spec.rb
index 59cdcb4ec4ae67b8d144b29f3645a8aff7cc22e6..20d11f684337a698fa6e476f00aff4650fcd305f 100644
--- a/spec/serializers/merge_request_diff_entity_spec.rb
+++ b/spec/serializers/merge_request_diff_entity_spec.rb
@@ -76,7 +76,8 @@ def initialize_entity(merge_request, merge_request_diff)
     context 'when @merge_request_diffs.size > 1' do
       let(:merge_request) { create(:merge_request_with_multiple_diffs) }
 
-      it 'returns difference between size and diff index' do
+      it 'returns difference between size and diff index',
+        quarantine: 'https://gitlab.com/gitlab-org/gitlab/-/issues/445703' do
         expect(merge_request_diffs.size).to eq(2)
 
         # diff index: 0