--- a/dom/animation/AnimationPlayer.cpp
+++ b/dom/animation/AnimationPlayer.cpp
@@ -118,17 +118,22 @@ AnimationPlayer::SilentlySetCurrentTime(
 }
 
 // Implements http://w3c.github.io/web-animations/#set-the-current-time
 void
 AnimationPlayer::SetCurrentTime(const TimeDuration& aSeekTime)
 {
   SilentlySetCurrentTime(aSeekTime);
 
-  // Once pending pause tasks are supported, cancel that here.
+  if (mPendingState == PendingState::PausePending) {
+    CancelPendingTasks();
+    if (mReady) {
+      mReady->MaybeResolve(this);
+    }
+  }
 
   UpdateSourceContent();
   PostUpdate();
 
   // FIXME: Once bug 1074630 is fixed, run the procedure to update a player's
   // finished state for player:
   // http://w3c.github.io/web-animations/#update-a-players-finished-state
 }