1 files changed, 3 insertions, 1 deletions
diff --git a/tests/wpt/web-platform-tests/web-animations/resources/easing-tests.js b/tests/wpt/web-platform-tests/web-animations/resources/easing-tests.js
index f2d7a3ee5d5..fc433853882 100644
--- a/tests/wpt/web-platform-tests/web-animations/resources/easing-tests.js
+++ b/tests/wpt/web-platform-tests/web-animations/resources/easing-tests.js
@@ -1,4 +1,6 @@
-var gEasingTests = [
+'use strict';
+
+const gEasingTests = [
   {
     desc: 'step-start function',
     easing: 'step-start',