diff --git a/graphics/composer/2.1/vts/functional/VtsHalGraphicsComposerV2_1TargetTest.cpp b/graphics/composer/2.1/vts/functional/VtsHalGraphicsComposerV2_1TargetTest.cpp
index 4822678..9444d89 100644
--- a/graphics/composer/2.1/vts/functional/VtsHalGraphicsComposerV2_1TargetTest.cpp
+++ b/graphics/composer/2.1/vts/functional/VtsHalGraphicsComposerV2_1TargetTest.cpp
@@ -666,11 +666,13 @@
         ASSERT_NO_FATAL_FAILURE(GraphicsComposerHidlTest::TearDown());
     }
 
-    NativeHandleWrapper allocate() {
+    NativeHandleWrapper allocate() { return allocate(mDisplayWidth, mDisplayHeight); }
+
+    NativeHandleWrapper allocate(uint32_t width, uint32_t height) {
         uint64_t usage =
                 static_cast<uint64_t>(BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN |
                                       BufferUsage::COMPOSER_OVERLAY);
-        return mGralloc->allocate(mDisplayWidth, mDisplayHeight, 1, PixelFormat::RGBA_8888, usage);
+        return mGralloc->allocate(width, height, 1, PixelFormat::RGBA_8888, usage);
     }
 
     void execute() { mComposerClient->execute(mReader.get(), mWriter.get()); }
@@ -884,6 +886,106 @@
 }
 
 /**
+ * Test IComposerClient::Command::SET_LAYER_BUFFER with the behavior used for clearing buffer slots.
+ */
+TEST_P(GraphicsComposerHidlCommandTest, SET_LAYER_BUFFER_multipleTimes) {
+    // A placeholder buffer used to clear buffer slots
+    auto clearSlotBuffer = allocate(1u, 1u);
+
+    //
+    // Set the layer buffer to the first buffer
+    //
+    auto handle1 = allocate();
+    ASSERT_NE(nullptr, handle1.get());
+    IComposerClient::Rect displayFrame{0, 0, mDisplayWidth, mDisplayHeight};
+    Layer layer;
+    ASSERT_NO_FATAL_FAILURE(
+            layer = mComposerClient->createLayer(mPrimaryDisplay, kBufferSlotCount));
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->selectLayer(layer);
+    mWriter->setLayerCompositionType(IComposerClient::Composition::DEVICE);
+    mWriter->setLayerDisplayFrame(displayFrame);
+    mWriter->setLayerBuffer(0, handle1.get(), -1);
+    mWriter->setLayerDataspace(Dataspace::UNKNOWN);
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        GTEST_SUCCEED() << "Composition change requested, skipping test";
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    //
+    // Set the layer buffer to the second buffer
+    //
+    auto handle2 = allocate();
+    ASSERT_NE(nullptr, handle2.get());
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->selectLayer(layer);
+    mWriter->setLayerCompositionType(IComposerClient::Composition::DEVICE);
+    mWriter->setLayerDisplayFrame(displayFrame);
+    mWriter->setLayerBuffer(1, handle2.get(), -1);
+    mWriter->setLayerDataspace(Dataspace::UNKNOWN);
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        GTEST_SUCCEED() << "Composition change requested, skipping test";
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    //
+    // Set the layer buffer to the third buffer
+    //
+    auto handle3 = allocate();
+    ASSERT_NE(nullptr, handle3.get());
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->selectLayer(layer);
+    mWriter->setLayerCompositionType(IComposerClient::Composition::DEVICE);
+    mWriter->setLayerDisplayFrame(displayFrame);
+    mWriter->setLayerBuffer(2, handle3.get(), -1);
+    mWriter->setLayerDataspace(Dataspace::UNKNOWN);
+    mWriter->validateDisplay();
+    execute();
+    if (mReader->mCompositionChanges.size() != 0) {
+        GTEST_SUCCEED() << "Composition change requested, skipping test";
+        return;
+    }
+    ASSERT_EQ(0, mReader->mErrors.size());
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    // Ensure we can clear multiple buffer slots and then restore the active buffer at the end
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->selectLayer(layer);
+    mWriter->setLayerBuffer(0, clearSlotBuffer.get(), -1);
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->selectLayer(layer);
+    mWriter->setLayerBuffer(1, clearSlotBuffer.get(), -1);
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->selectLayer(layer);
+    mWriter->setLayerBuffer(2, nullptr, -1);
+    mWriter->validateDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+
+    mWriter->selectDisplay(mPrimaryDisplay);
+    mWriter->presentDisplay();
+    execute();
+    ASSERT_EQ(0, mReader->mErrors.size());
+}
+
+/**
  * Test IComposerClient::Command::SET_LAYER_SURFACE_DAMAGE.
  */
 TEST_P(GraphicsComposerHidlCommandTest, SET_LAYER_SURFACE_DAMAGE) {
diff --git a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
index 746330b..2b1b753 100644
--- a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
+++ b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
@@ -1225,17 +1225,21 @@
         });
     }
 
-    sp<GraphicBuffer> allocate(::android::PixelFormat pixelFormat) {
+    sp<GraphicBuffer> allocate(uint32_t width, uint32_t height,
+                               ::android::PixelFormat pixelFormat) {
         return sp<GraphicBuffer>::make(
-                static_cast<uint32_t>(getPrimaryDisplay().getDisplayWidth()),
-                static_cast<uint32_t>(getPrimaryDisplay().getDisplayHeight()), pixelFormat,
-                /*layerCount*/ 1U,
-                (static_cast<uint64_t>(common::BufferUsage::CPU_WRITE_OFTEN) |
-                 static_cast<uint64_t>(common::BufferUsage::CPU_READ_OFTEN) |
-                 static_cast<uint64_t>(common::BufferUsage::COMPOSER_OVERLAY)),
+                width, height, pixelFormat, /*layerCount*/ 1U,
+                static_cast<uint64_t>(common::BufferUsage::CPU_WRITE_OFTEN) |
+                        static_cast<uint64_t>(common::BufferUsage::CPU_READ_OFTEN) |
+                        static_cast<uint64_t>(common::BufferUsage::COMPOSER_OVERLAY),
                 "VtsHalGraphicsComposer3_TargetTest");
     }
 
+    sp<GraphicBuffer> allocate(::android::PixelFormat pixelFormat) {
+        return allocate(static_cast<uint32_t>(getPrimaryDisplay().getDisplayWidth()),
+                        static_cast<uint32_t>(getPrimaryDisplay().getDisplayHeight()), pixelFormat);
+    }
+
     void sendRefreshFrame(const VtsDisplay& display, const VsyncPeriodChangeTimeline* timeline) {
         if (timeline != nullptr) {
             // Refresh time should be before newVsyncAppliedTimeNanos
@@ -1749,6 +1753,104 @@
     execute();
 }
 
+TEST_P(GraphicsComposerAidlCommandTest, SetLayerBufferSlotsToClear) {
+    // Older HAL versions use a backwards compatible way of clearing buffer slots
+    const auto& [versionStatus, version] = mComposerClient->getInterfaceVersion();
+    ASSERT_TRUE(versionStatus.isOk());
+    if (version <= 1) {
+        GTEST_SUCCEED() << "HAL at version 1 or lower does not have "
+                           "LayerCommand::bufferSlotsToClear.";
+        return;
+    }
+
+    const auto& [layerStatus, layer] =
+            mComposerClient->createLayer(getPrimaryDisplayId(), kBufferSlotCount);
+    EXPECT_TRUE(layerStatus.isOk());
+    auto& writer = getWriter(getPrimaryDisplayId());
+
+    // setup 3 buffers in the buffer cache, with the last buffer being active
+    // then emulate the Android platform code that clears all 3 buffer slots
+
+    const auto buffer1 = allocate(::android::PIXEL_FORMAT_RGBA_8888);
+    ASSERT_NE(nullptr, buffer1);
+    const auto handle1 = buffer1->handle;
+    writer.setLayerBuffer(getPrimaryDisplayId(), layer, /*slot*/ 0, handle1, /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+
+    const auto buffer2 = allocate(::android::PIXEL_FORMAT_RGBA_8888);
+    ASSERT_NE(nullptr, buffer2);
+    const auto handle2 = buffer2->handle;
+    writer.setLayerBuffer(getPrimaryDisplayId(), layer, /*slot*/ 1, handle2, /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+
+    const auto buffer3 = allocate(::android::PIXEL_FORMAT_RGBA_8888);
+    ASSERT_NE(nullptr, buffer3);
+    const auto handle3 = buffer3->handle;
+    writer.setLayerBuffer(getPrimaryDisplayId(), layer, /*slot*/ 2, handle3, /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+
+    // Ensure we can clear all 3 buffer slots, even the active buffer - it is assumed the
+    // current active buffer's slot will be cleared, but still remain the active buffer and no
+    // errors will occur.
+    writer.setLayerBufferSlotsToClear(getPrimaryDisplayId(), layer, {0, 1, 2});
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+}
+
+TEST_P(GraphicsComposerAidlCommandTest, SetLayerBufferMultipleTimes) {
+    const auto& [layerStatus, layer] =
+            mComposerClient->createLayer(getPrimaryDisplayId(), kBufferSlotCount);
+    EXPECT_TRUE(layerStatus.isOk());
+    auto& writer = getWriter(getPrimaryDisplayId());
+
+    // Setup 3 buffers in the buffer cache, with the last buffer being active. Then, emulate the
+    // Android platform code that clears all 3 buffer slots by setting all but the active buffer
+    // slot to a placeholder buffer, and then restoring the active buffer.
+
+    // This is used on HALs that don't support setLayerBufferSlotsToClear (version <= 3.1).
+
+    const auto buffer1 = allocate(::android::PIXEL_FORMAT_RGBA_8888);
+    ASSERT_NE(nullptr, buffer1);
+    const auto handle1 = buffer1->handle;
+    writer.setLayerBuffer(getPrimaryDisplayId(), layer, /*slot*/ 0, handle1, /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+
+    const auto buffer2 = allocate(::android::PIXEL_FORMAT_RGBA_8888);
+    ASSERT_NE(nullptr, buffer2);
+    const auto handle2 = buffer2->handle;
+    writer.setLayerBuffer(getPrimaryDisplayId(), layer, /*slot*/ 1, handle2, /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+
+    const auto buffer3 = allocate(::android::PIXEL_FORMAT_RGBA_8888);
+    ASSERT_NE(nullptr, buffer3);
+    const auto handle3 = buffer3->handle;
+    writer.setLayerBuffer(getPrimaryDisplayId(), layer, /*slot*/ 2, handle3, /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+
+    // Older versions of the HAL clear all but the active buffer slot with a placeholder buffer,
+    // and then restoring the current active buffer at the end
+    auto clearSlotBuffer = allocate(1u, 1u, ::android::PIXEL_FORMAT_RGB_888);
+    ASSERT_NE(nullptr, clearSlotBuffer);
+    auto clearSlotBufferHandle = clearSlotBuffer->handle;
+
+    // clear buffer slots 0 and 1 with new layer commands... and then...
+    writer.setLayerBufferWithNewCommand(getPrimaryDisplayId(), layer, /* slot */ 0,
+                                        clearSlotBufferHandle, /*acquireFence*/ -1);
+    writer.setLayerBufferWithNewCommand(getPrimaryDisplayId(), layer, /* slot */ 1,
+                                        clearSlotBufferHandle, /*acquireFence*/ -1);
+    // ...reset the layer buffer to the current active buffer slot with a final new command
+    writer.setLayerBufferWithNewCommand(getPrimaryDisplayId(), layer, /*slot*/ 2, nullptr,
+                                        /*acquireFence*/ -1);
+    execute();
+    ASSERT_TRUE(mReader.takeErrors().empty());
+}
+
 TEST_P(GraphicsComposerAidlCommandTest, SetLayerSurfaceDamage) {
     const auto& [layerStatus, layer] =
             mComposerClient->createLayer(getPrimaryDisplayId(), kBufferSlotCount);
@@ -2583,4 +2685,4 @@
     }
 
     return RUN_ALL_TESTS();
-}
\ No newline at end of file
+}