diff --git a/services/surfaceflinger/tests/unittests/LayerLifecycleManagerTest.cpp b/services/surfaceflinger/tests/unittests/LayerLifecycleManagerTest.cpp
index e3c7837..d65277a 100644
--- a/services/surfaceflinger/tests/unittests/LayerLifecycleManagerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerLifecycleManagerTest.cpp
@@ -389,4 +389,52 @@
     listener->expectLayersDestroyed({1, bgLayerId});
 }
 
+TEST_F(LayerLifecycleManagerTest, blurSetsVisibilityChangeFlag) {
+    // clear default color on layer so we start with a layer that does not draw anything.
+    setColor(1, {-1.f, -1.f, -1.f});
+    mLifecycleManager.commitChanges();
+
+    // layer has something to draw
+    setBackgroundBlurRadius(1, 2);
+    EXPECT_TRUE(
+            mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Visibility));
+    mLifecycleManager.commitChanges();
+
+    // layer still has something to draw, so visibility shouldn't change
+    setBackgroundBlurRadius(1, 3);
+    EXPECT_FALSE(
+            mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Visibility));
+    mLifecycleManager.commitChanges();
+
+    // layer has nothing to draw
+    setBackgroundBlurRadius(1, 0);
+    EXPECT_TRUE(
+            mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Visibility));
+    mLifecycleManager.commitChanges();
+}
+
+TEST_F(LayerLifecycleManagerTest, colorSetsVisibilityChangeFlag) {
+    // clear default color on layer so we start with a layer that does not draw anything.
+    setColor(1, {-1.f, -1.f, -1.f});
+    mLifecycleManager.commitChanges();
+
+    // layer has something to draw
+    setColor(1, {2.f, 3.f, 4.f});
+    EXPECT_TRUE(
+            mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Visibility));
+    mLifecycleManager.commitChanges();
+
+    // layer still has something to draw, so visibility shouldn't change
+    setColor(1, {0.f, 0.f, 0.f});
+    EXPECT_FALSE(
+            mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Visibility));
+    mLifecycleManager.commitChanges();
+
+    // layer has nothing to draw
+    setColor(1, {-1.f, -1.f, -1.f});
+    EXPECT_TRUE(
+            mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Visibility));
+    mLifecycleManager.commitChanges();
+}
+
 } // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/tests/unittests/LayerSnapshotTest.cpp b/services/surfaceflinger/tests/unittests/LayerSnapshotTest.cpp
index 84c3775..c8eda12 100644
--- a/services/surfaceflinger/tests/unittests/LayerSnapshotTest.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerSnapshotTest.cpp
@@ -349,16 +349,22 @@
 }
 
 TEST_F(LayerSnapshotTest, blurUpdatesWhenAlphaChanges) {
-    static constexpr int blurRadius = 42;
-    setBackgroundBlurRadius(1221, blurRadius);
+    int blurRadius = 42;
+    setBackgroundBlurRadius(1221, static_cast<uint32_t>(blurRadius));
 
     UPDATE_AND_VERIFY(mSnapshotBuilder, STARTING_ZORDER);
     EXPECT_EQ(getSnapshot({.id = 1221})->backgroundBlurRadius, blurRadius);
 
+    blurRadius = 21;
+    setBackgroundBlurRadius(1221, static_cast<uint32_t>(blurRadius));
+    UPDATE_AND_VERIFY(mSnapshotBuilder, STARTING_ZORDER);
+    EXPECT_EQ(getSnapshot({.id = 1221})->backgroundBlurRadius, blurRadius);
+
     static constexpr float alpha = 0.5;
     setAlpha(12, alpha);
     UPDATE_AND_VERIFY(mSnapshotBuilder, STARTING_ZORDER);
-    EXPECT_EQ(getSnapshot({.id = 1221})->backgroundBlurRadius, blurRadius * alpha);
+    EXPECT_EQ(getSnapshot({.id = 1221})->backgroundBlurRadius,
+              static_cast<int>(static_cast<float>(blurRadius) * alpha));
 }
 
 // Display Mirroring Tests