diff --git a/test/unit/legacy-noattributes.html b/test/unit/legacy-noattributes.html
index 92ed94d828..20c7d65627 100644
--- a/test/unit/legacy-noattributes.html
+++ b/test/unit/legacy-noattributes.html
@@ -113,8 +113,8 @@
       });
 
       test('telemetry collected as expected', () => {
-        const def = registrations.find((def) => def.is === el.localName);
-        assert.ok(def);
+        const defs = registrations.filter((def) => def.is === el.localName);
+        assert.ok(defs[0]);
       });
 
       test('native properties observeable when `_legacyForceObservedAttributes` set', function() {