diff --git a/internal/certmanager/test_files/reactors.go b/internal/certmanager/test_files/reactors.go
index 8dcdcfb81e..63aad0a006 100644
--- a/internal/certmanager/test_files/reactors.go
+++ b/internal/certmanager/test_files/reactors.go
@@ -46,11 +46,7 @@ func ObjectCreatedReactor(t *testing.T, b *Builder, expectedObj runtime.Object)
 		if !ok {
 			return
 		}
-		obj, ok := createAction.GetObject().(runtime.Object)
-		if !ok {
-			t.Errorf("object passed to Create does not implement runtime.Object")
-		}
-
+		obj := createAction.GetObject()
 		if !reflect.DeepEqual(obj, expectedObj) {
 			t.Errorf("expected %+v to equal %+v", obj, expectedObj)
 		}