diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index 049b092..10e2220 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -25,7 +25,6 @@
 #include "Scheduler/EventThread.h"
 #include "Scheduler/RefreshRateSelector.h"
 #include "Scheduler/VSyncPredictor.h"
-#include "Scheduler/VSyncReactor.h"
 #include "TestableScheduler.h"
 #include "TestableSurfaceFlinger.h"
 #include "mock/DisplayHardware/MockDisplayMode.h"
@@ -564,8 +563,7 @@
                                  hal::VrrConfig{.minFrameIntervalNs = static_cast<int32_t>(
                                                         frameRate.getPeriodNsecs())}));
     std::shared_ptr<VSyncPredictor> vrrTracker =
-            std::make_shared<VSyncPredictor>(std::make_unique<SystemClock>(), kMode, kHistorySize,
-                                             kMinimumSamplesForPrediction,
+            std::make_shared<VSyncPredictor>(kMode, kHistorySize, kMinimumSamplesForPrediction,
                                              kOutlierTolerancePercent);
     std::shared_ptr<RefreshRateSelector> vrrSelectorPtr =
             std::make_shared<RefreshRateSelector>(makeModes(kMode), kMode->getId());
@@ -580,8 +578,6 @@
     vrrSelectorPtr->setActiveMode(kMode->getId(), frameRate);
     scheduler.setRenderRate(kMode->getPhysicalDisplayId(), frameRate);
     vrrTracker->addVsyncTimestamp(0);
-    // Set 1000 as vsync seq #0
-    vrrTracker->nextAnticipatedVSyncTimeFrom(700);
 
     EXPECT_EQ(Fps::fromPeriodNsecs(1000),
               scheduler.getNextFrameInterval(kMode->getPhysicalDisplayId(),
@@ -591,7 +587,7 @@
                                              TimePoint::fromNs(2000)));
 
     // Not crossing the min frame period
-    EXPECT_EQ(Fps::fromPeriodNsecs(1000),
+    EXPECT_EQ(Fps::fromPeriodNsecs(1500),
               scheduler.getNextFrameInterval(kMode->getPhysicalDisplayId(),
                                              TimePoint::fromNs(2500)));
     // Change render rate
@@ -599,9 +595,6 @@
     vrrSelectorPtr->setActiveMode(kMode->getId(), frameRate);
     scheduler.setRenderRate(kMode->getPhysicalDisplayId(), frameRate);
 
-    // Set 2000 as vsync seq #0
-    vrrTracker->nextAnticipatedVSyncTimeFrom(1700);
-
     EXPECT_EQ(Fps::fromPeriodNsecs(2000),
               scheduler.getNextFrameInterval(kMode->getPhysicalDisplayId(),
                                              TimePoint::fromNs(2000)));
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
index c22deab..d891008 100644
--- a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
@@ -48,7 +48,7 @@
     Period minFramePeriod() const final { return Period::fromNs(currentPeriod()); }
     void resetModel() final {}
     bool needsMoreSamples() const final { return false; }
-    bool isVSyncInPhase(nsecs_t, Fps) final { return false; }
+    bool isVSyncInPhase(nsecs_t, Fps) const final { return false; }
     void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) final {}
     void setRenderRate(Fps) final {}
     void onFrameBegin(TimePoint, TimePoint) final {}
@@ -64,7 +64,7 @@
 public:
     FixedRateIdealStubTracker() : StubTracker{toNs(3ms)} {}
 
-    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint, std::optional<nsecs_t>) final {
+    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint, std::optional<nsecs_t>) const final {
         auto const floor = timePoint % mPeriod;
         if (floor == 0) {
             return timePoint;
@@ -77,7 +77,7 @@
 public:
     VRRStubTracker(nsecs_t period) : StubTracker(period) {}
 
-    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t time_point, std::optional<nsecs_t>) final {
+    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t time_point, std::optional<nsecs_t>) const final {
         std::lock_guard lock(mMutex);
         auto const normalized_to_base = time_point - mBase;
         auto const floor = (normalized_to_base) % mPeriod;
diff --git a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
index 6b9ea56..b9f3d70 100644
--- a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
@@ -75,28 +75,6 @@
     return ftl::as_non_null(createDisplayMode(DisplayModeId(0), refreshRate, kGroup, kResolution,
                                               DEFAULT_DISPLAY_ID));
 }
-
-class TestClock : public Clock {
-public:
-    TestClock() = default;
-
-    nsecs_t now() const override { return mNow; }
-    void setNow(nsecs_t now) { mNow = now; }
-
-private:
-    nsecs_t mNow = 0;
-};
-
-class ClockWrapper : public Clock {
-public:
-    ClockWrapper(std::shared_ptr<Clock> const& clock) : mClock(clock) {}
-
-    nsecs_t now() const { return mClock->now(); }
-
-private:
-    std::shared_ptr<Clock> const mClock;
-};
-
 } // namespace
 
 struct VSyncPredictorTest : testing::Test {
@@ -108,10 +86,8 @@
     static constexpr size_t kOutlierTolerancePercent = 25;
     static constexpr nsecs_t mMaxRoundingError = 100;
 
-    std::shared_ptr<TestClock> mClock{std::make_shared<TestClock>()};
-
-    VSyncPredictor tracker{std::make_unique<ClockWrapper>(mClock), mMode, kHistorySize,
-                           kMinimumSamplesForPrediction, kOutlierTolerancePercent};
+    VSyncPredictor tracker{mMode, kHistorySize, kMinimumSamplesForPrediction,
+                           kOutlierTolerancePercent};
 };
 
 TEST_F(VSyncPredictorTest, reportsAnticipatedPeriod) {
@@ -432,8 +408,7 @@
 // See b/151146131
 TEST_F(VSyncPredictorTest, hasEnoughPrecision) {
     const auto mode = displayMode(mPeriod);
-    VSyncPredictor tracker{std::make_unique<ClockWrapper>(mClock), mode, 20,
-                           kMinimumSamplesForPrediction, kOutlierTolerancePercent};
+    VSyncPredictor tracker{mode, 20, kMinimumSamplesForPrediction, kOutlierTolerancePercent};
     std::vector<nsecs_t> const simulatedVsyncs{840873348817, 840890049444, 840906762675,
                                                840923581635, 840940161584, 840956868096,
                                                840973702473, 840990256277, 841007116851,
@@ -631,6 +606,35 @@
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 5100), Eq(mNow + 7 * mPeriod));
 }
 
+TEST_F(VSyncPredictorTest, setRenderRateOfDivisorIsInPhase) {
+    auto last = mNow;
+    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
+        EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(last + mPeriod));
+        mNow += mPeriod;
+        last = mNow;
+        tracker.addVsyncTimestamp(mNow);
+    }
+
+    const auto refreshRate = Fps::fromPeriodNsecs(mPeriod);
+
+    tracker.setRenderRate(refreshRate / 4);
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 3 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 3 * mPeriod), Eq(mNow + 7 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 7 * mPeriod), Eq(mNow + 11 * mPeriod));
+
+    tracker.setRenderRate(refreshRate / 2);
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 1 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1 * mPeriod), Eq(mNow + 3 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 3 * mPeriod), Eq(mNow + 5 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 5 * mPeriod), Eq(mNow + 7 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 7 * mPeriod), Eq(mNow + 9 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 9 * mPeriod), Eq(mNow + 11 * mPeriod));
+
+    tracker.setRenderRate(refreshRate / 6);
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 1 * mPeriod));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1 * mPeriod), Eq(mNow + 7 * mPeriod));
+}
+
 TEST_F(VSyncPredictorTest, setRenderRateIsIgnoredIfNotDivisor) {
     auto last = mNow;
     for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
@@ -666,8 +670,8 @@
                                      .setVrrConfig(std::move(vrrConfig))
                                      .build());
 
-    VSyncPredictor vrrTracker{std::make_unique<ClockWrapper>(mClock), kMode, kHistorySize,
-                              kMinimumSamplesForPrediction, kOutlierTolerancePercent};
+    VSyncPredictor vrrTracker{kMode, kHistorySize, kMinimumSamplesForPrediction,
+                              kOutlierTolerancePercent};
 
     vrrTracker.setRenderRate(minFrameRate);
     vrrTracker.addVsyncTimestamp(0);
@@ -683,44 +687,7 @@
     vrrTracker.onFrameMissed(TimePoint::fromNs(4500));
     EXPECT_EQ(5000, vrrTracker.nextAnticipatedVSyncTimeFrom(4500, 4500));
     EXPECT_EQ(6000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
-
-    vrrTracker.onFrameBegin(TimePoint::fromNs(7000), TimePoint::fromNs(6500));
-    EXPECT_EQ(10500, vrrTracker.nextAnticipatedVSyncTimeFrom(9000, 7000));
 }
-
-TEST_F(VSyncPredictorTest, renderRateIsPreservedForCommittedVsyncs) {
-    tracker.addVsyncTimestamp(1000);
-
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(1), Eq(1000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(5001), Eq(6000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(6001), Eq(7000));
-
-    tracker.setRenderRate(Fps::fromPeriodNsecs(2000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(1), Eq(1000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(5001), Eq(6000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(6001), Eq(7000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(7001), Eq(8000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(8001), Eq(10000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(9001), Eq(10000));
-
-    tracker.setRenderRate(Fps::fromPeriodNsecs(3000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(1), Eq(1000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(5001), Eq(6000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(6001), Eq(7000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(7001), Eq(8000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(8001), Eq(10000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(9001), Eq(10000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(10001), Eq(11000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(11001), Eq(14000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(12001), Eq(14000));
-
-    // Check the purge logic works
-    mClock->setNow(20000);
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(1), Eq(2000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(5001), Eq(8000));
-    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(6001), Eq(8000));
-}
-
 } // namespace android::scheduler
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
diff --git a/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h b/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h
index 6d10a5c..3870983 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h
@@ -29,12 +29,12 @@
 
     MOCK_METHOD(bool, addVsyncTimestamp, (nsecs_t), (override));
     MOCK_METHOD(nsecs_t, nextAnticipatedVSyncTimeFrom, (nsecs_t, std::optional<nsecs_t>),
-                (override));
+                (const, override));
     MOCK_METHOD(nsecs_t, currentPeriod, (), (const, override));
     MOCK_METHOD(Period, minFramePeriod, (), (const, override));
     MOCK_METHOD(void, resetModel, (), (override));
     MOCK_METHOD(bool, needsMoreSamples, (), (const, override));
-    MOCK_METHOD(bool, isVSyncInPhase, (nsecs_t, Fps), (override));
+    MOCK_METHOD(bool, isVSyncInPhase, (nsecs_t, Fps), (const, override));
     MOCK_METHOD(void, setDisplayModePtr, (ftl::NonNull<DisplayModePtr>), (override));
     MOCK_METHOD(void, setRenderRate, (Fps), (override));
     MOCK_METHOD(void, onFrameBegin, (TimePoint, TimePoint), (override));