--- a/devtools/client/animationinspector/test/browser_animation_animated_properties_displayed.js
+++ b/devtools/client/animationinspector/test/browser_animation_animated_properties_displayed.js
@@ -4,17 +4,18 @@
 
 "use strict";
 
 // Test that when an animation is selected, its list of animated properties is
 // displayed below it.
 
 const EXPECTED_PROPERTIES = [
   "background-color",
-  "background-position",
+  "background-position-x",
+  "background-position-y",
   "background-size",
   "border-bottom-left-radius",
   "border-bottom-right-radius",
   "border-top-left-radius",
   "border-top-right-radius",
   "filter",
   "height",
   "transform",