diff --git a/pkg/registry/core/service/storage/storage_test.go b/pkg/registry/core/service/storage/storage_test.go
index b1f63dd20f2..79dfeab5cfb 100644
--- a/pkg/registry/core/service/storage/storage_test.go
+++ b/pkg/registry/core/service/storage/storage_test.go
@@ -5826,8 +5826,13 @@ type svcTestCase struct {
 	expectHeadless            bool
 	expectNodePorts           bool
 	expectHealthCheckNodePort bool
+
+	// Additional proofs, provided by the tests which use this.
+	prove []svcTestProof
 }
 
+type svcTestProof func(t *testing.T, storage *GenericREST, before, after *api.Service)
+
 func callName(before, after *api.Service) string {
 	if before == nil && after != nil {
 		return "create"
@@ -6287,6 +6292,10 @@ func verifyExpectations(t *testing.T, storage *GenericREST, tc svcTestCase, befo
 	} else {
 		proveHealthCheckNodePortDeallocated(t, storage, before, after)
 	}
+
+	for _, p := range tc.prove {
+		p(t, storage, before, after)
+	}
 }
 
 func TestFeatureExternalName(t *testing.T) {