diff --git a/libs/ui/tests/Android.bp b/libs/ui/tests/Android.bp
index 08067fc..aef6428 100644
--- a/libs/ui/tests/Android.bp
+++ b/libs/ui/tests/Android.bp
@@ -27,3 +27,10 @@
     srcs: ["colorspace_test.cpp"],
     cflags: ["-Wall", "-Werror"],
 }
+
+cc_test {
+    name: "GraphicBuffer_test",
+    shared_libs: ["libpdx_default_transport", "libui", "libutils"],
+    srcs: ["GraphicBuffer_test.cpp"],
+    cflags: ["-Wall", "-Werror"],
+}
diff --git a/libs/ui/tests/GraphicBuffer_test.cpp b/libs/ui/tests/GraphicBuffer_test.cpp
new file mode 100644
index 0000000..eb679ac
--- /dev/null
+++ b/libs/ui/tests/GraphicBuffer_test.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2018 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.
+ */
+
+#define LOG_TAG "GraphicBufferTest"
+
+#include <ui/DetachedBufferHandle.h>
+#include <ui/GraphicBuffer.h>
+
+#include <gtest/gtest.h>
+
+namespace android {
+
+namespace {
+
+constexpr uint32_t kTestWidth = 1024;
+constexpr uint32_t kTestHeight = 1;
+constexpr uint32_t kTestFormat = HAL_PIXEL_FORMAT_BLOB;
+constexpr uint32_t kTestLayerCount = 1;
+constexpr uint64_t kTestUsage = GraphicBuffer::USAGE_SW_WRITE_OFTEN;
+
+} // namespace
+
+class GraphicBufferTest : public testing::Test {};
+
+TEST_F(GraphicBufferTest, DetachedBuffer) {
+    sp<GraphicBuffer> buffer(
+            new GraphicBuffer(kTestWidth, kTestHeight, kTestFormat, kTestLayerCount, kTestUsage));
+
+    // Currently a newly allocated GraphicBuffer is in legacy mode, i.e. not associated with
+    // BufferHub. But this may change in the future.
+    EXPECT_FALSE(buffer->isDetachedBuffer());
+
+    pdx::LocalChannelHandle channel{nullptr, 1234};
+    EXPECT_TRUE(channel.valid());
+
+    std::unique_ptr<DetachedBufferHandle> handle = DetachedBufferHandle::Create(std::move(channel));
+    EXPECT_FALSE(channel.valid());
+    EXPECT_TRUE(handle->isValid());
+    EXPECT_TRUE(handle->handle().valid());
+
+    buffer->setDetachedBufferHandle(std::move(handle));
+    EXPECT_TRUE(handle == nullptr);
+    EXPECT_TRUE(buffer->isDetachedBuffer());
+
+    handle = buffer->takeDetachedBufferHandle();
+    EXPECT_TRUE(handle != nullptr);
+    EXPECT_TRUE(handle->isValid());
+    EXPECT_FALSE(buffer->isDetachedBuffer());
+}
+
+} // namespace android