diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.cpp b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
index 892ae62..2f1faac 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
@@ -221,14 +221,13 @@
     }
 }
 
-nsecs_t VSyncReactor::computeNextRefresh(int periodOffset) const {
-    auto const now = mClock->now();
+nsecs_t VSyncReactor::computeNextRefresh(int periodOffset, nsecs_t now) const {
     auto const currentPeriod = periodOffset ? mTracker->currentPeriod() : 0;
     return mTracker->nextAnticipatedVSyncTimeFrom(now + periodOffset * currentPeriod);
 }
 
-nsecs_t VSyncReactor::expectedPresentTime() {
-    return mTracker->nextAnticipatedVSyncTimeFrom(mClock->now());
+nsecs_t VSyncReactor::expectedPresentTime(nsecs_t now) {
+    return mTracker->nextAnticipatedVSyncTimeFrom(now);
 }
 
 void VSyncReactor::startPeriodTransition(nsecs_t newPeriod) {