--- a/dom/animation/test/css-animations/test_pseudoElement-get-animations.html
+++ b/dom/animation/test/css-animations/test_pseudoElement-get-animations.html
@@ -63,13 +63,13 @@ test(t => {
   assert_equals(anims[1].transitionProperty, 'width',
                 '2nd animation is the 2nd transition sorted by name ');
   assert_equals(anims[2].animationName, 'anim1',
                 '3rd animation is the 1st animation in animation-name list');
   assert_equals(anims[3].animationName, 'anim2',
                 '4rd animation is the 2nd animation in animation-name list');
   assert_equals(anims[4].id, 'scripted-anim',
                 'Animation added by script appears last');
-}, 'getAnimations returns css transitions/animations, and script-generated ' +
+}, 'getAnimations returns CSS transitions/animations, and script-generated ' +
    'animations in the expected order');
 
 </script>
 </body>