diff --git a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
index cc46043..b474e42 100644
--- a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
@@ -125,7 +125,7 @@
     // These mocks are created only when expected to be created via a factory.
     sp<mock::GraphicBufferConsumer> mConsumer;
     sp<mock::GraphicBufferProducer> mProducer;
-    mock::NativeWindowSurface* mNativeWindowSurface = nullptr;
+    surfaceflinger::mock::NativeWindowSurface* mNativeWindowSurface = nullptr;
     sp<mock::NativeWindow> mNativeWindow;
     renderengine::mock::Surface* mRenderSurface = nullptr;
 };
@@ -195,11 +195,12 @@
     // This setup is only expected once per test.
     ASSERT_TRUE(mNativeWindowSurface == nullptr);
 
-    mNativeWindowSurface = new mock::NativeWindowSurface();
+    mNativeWindowSurface = new surfaceflinger::mock::NativeWindowSurface();
     mNativeWindow = new mock::NativeWindow();
 
-    mFlinger.setCreateNativeWindowSurface(
-            [this](auto) { return std::unique_ptr<NativeWindowSurface>(mNativeWindowSurface); });
+    mFlinger.setCreateNativeWindowSurface([this](auto) {
+        return std::unique_ptr<surfaceflinger::NativeWindowSurface>(mNativeWindowSurface);
+    });
 }
 
 bool DisplayTransactionTest::hasHwcDisplay(hwc2_display_t displayId) {
diff --git a/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.cpp b/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.cpp
index 25ff39b..9cc6d38 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.cpp
+++ b/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.cpp
@@ -1,6 +1,6 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
- *
+ * 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
@@ -16,12 +16,10 @@
 
 #include "mock/MockNativeWindowSurface.h"
 
-namespace android {
-namespace mock {
+namespace android::surfaceflinger::mock {
 
 // Explicit default instantiation is recommended.
 NativeWindowSurface::NativeWindowSurface() = default;
 NativeWindowSurface::~NativeWindowSurface() = default;
 
-} // namespace mock
-} // namespace android
+} // namespace android::surfaceflinger::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.h b/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.h
index 88d1a9f..7bc1151 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockNativeWindowSurface.h
@@ -20,19 +20,17 @@
 
 #include <system/window.h> // for ANativeWindow
 
-#include "SurfaceFlinger.h" // for base NativeWindowSurface
+#include "NativeWindowSurface.h"
 
-namespace android {
-namespace mock {
+namespace android::surfaceflinger::mock {
 
-class NativeWindowSurface : public android::NativeWindowSurface {
+class NativeWindowSurface : public surfaceflinger::NativeWindowSurface {
 public:
     NativeWindowSurface();
-    ~NativeWindowSurface();
+    ~NativeWindowSurface() override;
 
     MOCK_CONST_METHOD0(getNativeWindow, sp<ANativeWindow>());
     MOCK_METHOD0(preallocateBuffers, void());
 };
 
-} // namespace mock
-} // namespace android
+} // namespace android::surfaceflinger::mock