--- a/layout/generic/nsGfxScrollFrame.cpp
+++ b/layout/generic/nsGfxScrollFrame.cpp
@@ -2277,17 +2277,19 @@ ScrollFrameHelper::ScrollToWithOrigin(ns
   if (aMode == nsIScrollableFrame::INSTANT) {
     // Asynchronous scrolling is not allowed, so we'll kill any existing
     // async-scrolling process and do an instant scroll.
     CompleteAsyncScroll(range, aOrigin);
     return;
   }
 
   nsPresContext* presContext = mOuter->PresContext();
-  TimeStamp now = presContext->RefreshDriver()->MostRecentRefresh();
+  TimeStamp now = presContext->RefreshDriver()->IsTestControllingRefreshesEnabled()
+                ? presContext->RefreshDriver()->MostRecentRefresh()
+                : TimeStamp::Now();
   bool isSmoothScroll = (aMode == nsIScrollableFrame::SMOOTH) &&
                           IsSmoothScrollingEnabled();
 
   nsSize currentVelocity(0, 0);
 
   if (gfxPrefs::ScrollBehaviorEnabled()) {
     if (aMode == nsIScrollableFrame::SMOOTH_MSD) {
       mIgnoreMomentumScroll = true;