diff --git a/test/unit/annotation_spec.js b/test/unit/annotation_spec.js
index 49c9b7c3aaf65..7c83ce53a921e 100644
--- a/test/unit/annotation_spec.js
+++ b/test/unit/annotation_spec.js
@@ -975,7 +975,7 @@ describe('annotation', function() {
 
             // Remove the last invalid flag for the next iteration.
             if (!valid) {
-              flags -= invalidFieldFlags.splice(-1, 1);
+              flags -= invalidFieldFlags.pop();
             }
           });
         });