--- a/dom/animation/test/testcommon.js
+++ b/dom/animation/test/testcommon.js
@@ -207,16 +207,34 @@ function propertyToIDL(property) {
  */
 function waitForFrame() {
   return new Promise(function(resolve, reject) {
     window.requestAnimationFrame(resolve);
   });
 }
 
 /**
+ * Waits for a requestAnimationFrame callback in the next refresh driver tick.
+ * Note that 'dom.animations-api.core.enabled' pref should be true to use this
+ * function.
+ */
+function waitForNextFrame() {
+  const timeAtStart = document.timeline.currentTime;
+  return new Promise(resolve => {
+    window.requestAnimationFrame(() => {
+      if (timeAtStart === document.timeline.currentTime) {
+        window.requestAnimationFrame(resolve);
+      } else {
+        resolve();
+      }
+    });
+  });
+}
+
+/**
  * Returns a Promise that is resolved after the given number of consecutive
  * animation frames have occured (using requestAnimationFrame callbacks).
  *
  * @param frameCount  The number of animation frames.
  * @param onFrame  An optional function to be processed in each animation frame.
  */
 function waitForAnimationFrames(frameCount, onFrame) {
   return new Promise(function(resolve, reject) {