diff --git a/graphics/composer/2.1/utils/vts/TestCommandReader.cpp b/graphics/composer/2.1/utils/vts/TestCommandReader.cpp
index 454a89c..0506f3a 100644
--- a/graphics/composer/2.1/utils/vts/TestCommandReader.cpp
+++ b/graphics/composer/2.1/utils/vts/TestCommandReader.cpp
@@ -29,63 +29,68 @@
     mErrors.clear();
     mCompositionChanges.clear();
     while (!isEmpty()) {
-        IComposerClient::Command command;
+        int32_t command;
         uint16_t length;
         ASSERT_TRUE(beginCommand(&command, &length));
 
-        switch (command) {
-            case IComposerClient::Command::SELECT_DISPLAY:
-                ASSERT_EQ(2, length);
-                read64();  // display
-                break;
-            case IComposerClient::Command::SET_ERROR: {
-                ASSERT_EQ(2, length);
-                auto loc = read();
-                auto err = readSigned();
-                std::pair<uint32_t, uint32_t> error(loc, err);
-                mErrors.push_back(error);
-            } break;
-            case IComposerClient::Command::SET_CHANGED_COMPOSITION_TYPES:
-                ASSERT_EQ(0, length % 3);
-                for (uint16_t count = 0; count < length / 3; ++count) {
-                    uint64_t layerId = read64();
-                    uint32_t composition = read();
-
-                    std::pair<uint64_t, uint32_t> compositionChange(layerId, composition);
-                    mCompositionChanges.push_back(compositionChange);
-                }
-                break;
-            case IComposerClient::Command::SET_DISPLAY_REQUESTS:
-                ASSERT_EQ(1, length % 3);
-                read();  // displayRequests, ignored for now
-                for (uint16_t count = 0; count < (length - 1) / 3; ++count) {
-                    read64();  // layer
-                    // silently eat requests to clear the client target, since we won't be testing
-                    // client composition anyway
-                    ASSERT_EQ(1u, read());
-                }
-                break;
-            case IComposerClient::Command::SET_PRESENT_FENCE:
-                ASSERT_EQ(1, length);
-                close(readFence());
-                break;
-            case IComposerClient::Command::SET_RELEASE_FENCES:
-                ASSERT_EQ(0, length % 3);
-                for (uint16_t count = 0; count < length / 3; ++count) {
-                    read64();
-                    close(readFence());
-                }
-                break;
-            default:
-                GTEST_FAIL() << "unexpected return command " << std::hex
-                             << static_cast<int>(command);
-                break;
-        }
+        parseSingleCommand(command, length);
 
         endCommand();
     }
 }
 
+void TestCommandReader::parseSingleCommand(int32_t commandRaw, uint16_t length) {
+    IComposerClient::Command command = static_cast<IComposerClient::Command>(commandRaw);
+
+    switch (command) {
+        case IComposerClient::Command::SELECT_DISPLAY:
+            ASSERT_EQ(2, length);
+            read64();  // display
+            break;
+        case IComposerClient::Command::SET_ERROR: {
+            ASSERT_EQ(2, length);
+            auto loc = read();
+            auto err = readSigned();
+            std::pair<uint32_t, uint32_t> error(loc, err);
+            mErrors.push_back(error);
+        } break;
+        case IComposerClient::Command::SET_CHANGED_COMPOSITION_TYPES:
+            ASSERT_EQ(0, length % 3);
+            for (uint16_t count = 0; count < length / 3; ++count) {
+                uint64_t layerId = read64();
+                uint32_t composition = read();
+
+                std::pair<uint64_t, uint32_t> compositionChange(layerId, composition);
+                mCompositionChanges.push_back(compositionChange);
+            }
+            break;
+        case IComposerClient::Command::SET_DISPLAY_REQUESTS:
+            ASSERT_EQ(1, length % 3);
+            read();  // displayRequests, ignored for now
+            for (uint16_t count = 0; count < (length - 1) / 3; ++count) {
+                read64();  // layer
+                // silently eat requests to clear the client target, since we won't be testing
+                // client composition anyway
+                ASSERT_EQ(1u, read());
+            }
+            break;
+        case IComposerClient::Command::SET_PRESENT_FENCE:
+            ASSERT_EQ(1, length);
+            close(readFence());
+            break;
+        case IComposerClient::Command::SET_RELEASE_FENCES:
+            ASSERT_EQ(0, length % 3);
+            for (uint16_t count = 0; count < length / 3; ++count) {
+                read64();
+                close(readFence());
+            }
+            break;
+        default:
+            GTEST_FAIL() << "unexpected return command " << std::hex << static_cast<int>(command);
+            break;
+    }
+}
+
 }  // namespace vts
 }  // namespace V2_1
 }  // namespace composer
diff --git a/graphics/composer/2.1/utils/vts/include/composer-vts/2.1/TestCommandReader.h b/graphics/composer/2.1/utils/vts/include/composer-vts/2.1/TestCommandReader.h
index c12debe..40d347a 100644
--- a/graphics/composer/2.1/utils/vts/include/composer-vts/2.1/TestCommandReader.h
+++ b/graphics/composer/2.1/utils/vts/include/composer-vts/2.1/TestCommandReader.h
@@ -29,12 +29,16 @@
 // returned.
 class TestCommandReader : public CommandReaderBase {
    public:
-    // Parse all commands in the return command queue.  Call GTEST_FAIL() for
-    // unexpected errors or commands.
-    void parse();
+     virtual ~TestCommandReader() = default;
+     // Parse all commands in the return command queue.  Call GTEST_FAIL() for
+     // unexpected errors or commands.
+     void parse();
 
-    std::vector<std::pair<uint32_t, uint32_t>> mErrors;
-    std::vector<std::pair<uint64_t, uint32_t>> mCompositionChanges;
+     std::vector<std::pair<uint32_t, uint32_t>> mErrors;
+     std::vector<std::pair<uint64_t, uint32_t>> mCompositionChanges;
+
+   protected:
+     virtual void parseSingleCommand(int32_t commandRaw, uint16_t length);
 };
 
 }  // namespace vts
diff --git a/graphics/composer/2.4/utils/vts/Android.bp b/graphics/composer/2.4/utils/vts/Android.bp
index e42223d..fc13c2a 100644
--- a/graphics/composer/2.4/utils/vts/Android.bp
+++ b/graphics/composer/2.4/utils/vts/Android.bp
@@ -20,6 +20,7 @@
     srcs: [
         "ComposerVts.cpp",
         "GraphicsComposerCallback.cpp",
+        "TestCommandReader.cpp",
     ],
     static_libs: [
         "android.hardware.graphics.composer@2.1",
@@ -33,6 +34,7 @@
         "android.hardware.graphics.composer@2.1-command-buffer",
         "android.hardware.graphics.composer@2.2-command-buffer",
         "android.hardware.graphics.composer@2.3-command-buffer",
+        "android.hardware.graphics.composer@2.4-command-buffer",
     ],
     cflags: [
         "-O0",
diff --git a/graphics/composer/2.4/utils/vts/ComposerVts.cpp b/graphics/composer/2.4/utils/vts/ComposerVts.cpp
index c5f3b5e..b3f3374 100644
--- a/graphics/composer/2.4/utils/vts/ComposerVts.cpp
+++ b/graphics/composer/2.4/utils/vts/ComposerVts.cpp
@@ -132,6 +132,38 @@
     return error;
 }
 
+void ComposerClient::execute(TestCommandReader* reader, CommandWriterBase* writer) {
+    bool queueChanged = false;
+    uint32_t commandLength = 0;
+    hidl_vec<hidl_handle> commandHandles;
+    ASSERT_TRUE(writer->writeQueue(&queueChanged, &commandLength, &commandHandles));
+
+    if (queueChanged) {
+        auto ret = mClient->setInputCommandQueue(*writer->getMQDescriptor());
+        ASSERT_EQ(V2_1::Error::NONE, ret);
+    }
+
+    mClient->executeCommands_2_3(
+            commandLength, commandHandles,
+            [&](const auto& tmpError, const auto& tmpOutQueueChanged, const auto& tmpOutLength,
+                const auto& tmpOutHandles) {
+                ASSERT_EQ(V2_1::Error::NONE, tmpError);
+
+                if (tmpOutQueueChanged) {
+                    mClient->getOutputCommandQueue(
+                            [&](const auto& tmpError, const auto& tmpDescriptor) {
+                                ASSERT_EQ(V2_3::Error::NONE, tmpError);
+                                reader->setMQDescriptor(tmpDescriptor);
+                            });
+                }
+
+                ASSERT_TRUE(reader->readQueue(tmpOutLength, tmpOutHandles));
+                reader->parse();
+            });
+    reader->reset();
+    writer->reset();
+}
+
 }  // namespace vts
 }  // namespace V2_4
 }  // namespace composer
diff --git a/graphics/composer/2.4/utils/vts/TestCommandReader.cpp b/graphics/composer/2.4/utils/vts/TestCommandReader.cpp
new file mode 100644
index 0000000..a1ca628
--- /dev/null
+++ b/graphics/composer/2.4/utils/vts/TestCommandReader.cpp
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <composer-vts/2.4/TestCommandReader.h>
+
+#include <gtest/gtest.h>
+
+namespace android::hardware::graphics::composer::V2_4::vts {
+
+void TestCommandReader::parseSingleCommand(int32_t commandRaw, uint16_t length) {
+    IComposerClient::Command command = static_cast<IComposerClient::Command>(commandRaw);
+
+    switch (command) {
+        case IComposerClient::Command::SET_CLIENT_TARGET_PROPERTY:
+            ASSERT_EQ(2, length);
+            read();
+            close(readFence());
+            break;
+        default:
+            return android::hardware::graphics::composer::V2_1::vts::TestCommandReader::
+                    parseSingleCommand(commandRaw, length);
+    }
+}
+
+}  // namespace android::hardware::graphics::composer::V2_4::vts
diff --git a/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h b/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h
index fd59eb9..28e17b4 100644
--- a/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h
+++ b/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/ComposerVts.h
@@ -22,6 +22,7 @@
 #include <android/hardware/graphics/composer/2.4/IComposer.h>
 #include <android/hardware/graphics/composer/2.4/IComposerClient.h>
 #include <composer-vts/2.3/ComposerVts.h>
+#include <composer-vts/2.4/TestCommandReader.h>
 #include <utils/StrongPointer.h>
 
 namespace android {
@@ -92,6 +93,8 @@
 
     Error setContentType(Display display, IComposerClient::ContentType contentType);
 
+    void execute(TestCommandReader* reader, CommandWriterBase* writer);
+
     Error getLayerGenericMetadataKeys(
             std::vector<IComposerClient::LayerGenericMetadataKey>* outKeys);
 
diff --git a/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/TestCommandReader.h b/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/TestCommandReader.h
new file mode 100644
index 0000000..5736fa6
--- /dev/null
+++ b/graphics/composer/2.4/utils/vts/include/composer-vts/2.4/TestCommandReader.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <composer-command-buffer/2.4/ComposerCommandBuffer.h>
+#include <composer-vts/2.1/TestCommandReader.h>
+
+namespace android::hardware::graphics::composer::V2_4::vts {
+
+// A command parser that checks that no error nor unexpected commands are
+// returned.
+class TestCommandReader
+    : public android::hardware::graphics::composer::V2_1::vts::TestCommandReader {
+  protected:
+    void parseSingleCommand(int32_t commandRaw, uint16_t length) override;
+};
+
+}  // namespace android::hardware::graphics::composer::V2_4::vts
diff --git a/graphics/composer/2.4/vts/functional/VtsHalGraphicsComposerV2_4TargetTest.cpp b/graphics/composer/2.4/vts/functional/VtsHalGraphicsComposerV2_4TargetTest.cpp
index a7c3fd7..b6343d3 100644
--- a/graphics/composer/2.4/vts/functional/VtsHalGraphicsComposerV2_4TargetTest.cpp
+++ b/graphics/composer/2.4/vts/functional/VtsHalGraphicsComposerV2_4TargetTest.cpp
@@ -23,9 +23,9 @@
 #include <android-base/logging.h>
 #include <android/hardware/graphics/mapper/2.0/IMapper.h>
 #include <composer-command-buffer/2.4/ComposerCommandBuffer.h>
-#include <composer-vts/2.1/TestCommandReader.h>
 #include <composer-vts/2.4/ComposerVts.h>
 #include <composer-vts/2.4/GraphicsComposerCallback.h>
+#include <composer-vts/2.4/TestCommandReader.h>
 #include <gtest/gtest.h>
 #include <hidl/GtestPrinter.h>
 #include <hidl/ServiceManagement.h>
@@ -77,7 +77,7 @@
         mComposerCallback->setVsyncAllowed(false);
 
         mWriter = std::make_unique<CommandWriterBase>(1024);
-        mReader = std::make_unique<V2_1::vts::TestCommandReader>();
+        mReader = std::make_unique<TestCommandReader>();
     }
 
     void TearDown() override {
@@ -153,7 +153,7 @@
     Display mPrimaryDisplay;
     Display mInvalidDisplayId;
     std::unique_ptr<CommandWriterBase> mWriter;
-    std::unique_ptr<V2_1::vts::TestCommandReader> mReader;
+    std::unique_ptr<TestCommandReader> mReader;
 
   private:
     Display waitForFirstDisplay() {
@@ -184,7 +184,7 @@
                 mPrimaryDisplay, activeConfig, IComposerClient::Attribute::HEIGHT);
 
         mWriter = std::make_unique<CommandWriterBase>(1024);
-        mReader = std::make_unique<V2_1::vts::TestCommandReader>();
+        mReader = std::make_unique<TestCommandReader>();
     }
 
     void TearDown() override {
@@ -211,7 +211,7 @@
                                   int64_t newPeriodNanos);
 
     std::unique_ptr<CommandWriterBase> mWriter;
-    std::unique_ptr<V2_1::vts::TestCommandReader> mReader;
+    std::unique_ptr<TestCommandReader> mReader;
     int32_t mDisplayWidth;
     int32_t mDisplayHeight;