diff --git a/tests/cases/user/chrome-devtools-frontend/definitions.js b/tests/cases/user/chrome-devtools-frontend/definitions.js
index c8bc93d47f159..8e1cf84ec3ade 100644
--- a/tests/cases/user/chrome-devtools-frontend/definitions.js
+++ b/tests/cases/user/chrome-devtools-frontend/definitions.js
@@ -1,6 +1,5 @@
 var Accessibility = {};
 var AccessibilityTestRunner = {};
-var Animation = {};
 var ApplicationTestRunner = {};
 var Audits = {};
 var Audits2 = {};