diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 2f35ae5..3fd355b 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -20,6 +20,16 @@
         // Using the address sanitizer not only helps uncover issues in the code
         // covered by the tests, but also covers some of the tricky injection of
         // fakes the unit tests currently do.
+        //
+        // Note: If you get an runtime link error like:
+        //
+        //   CANNOT LINK EXECUTABLE "/data/local/tmp/libsurfaceflinger_unittest": library "libclang_rt.asan-aarch64-android.so" not found
+        //
+        // it is because the address sanitizer shared objects are not installed
+        // by default in the system image.
+        //
+        // You can either "make dist tests" before flashing, or set this
+        // option to false temporarily.
         address: true,
     },
     srcs: [
@@ -51,6 +61,8 @@
     ],
     static_libs: [
         "libgmock",
+        "libcompositionengine",
+        "libcompositionengine_mocks",
     ],
     header_libs: [
         "libsurfaceflinger_headers",
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index 4da08b8..230dd99 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -16,6 +16,8 @@
 
 #pragma once
 
+#include <compositionengine/impl/CompositionEngine.h>
+
 #include "BufferQueueLayer.h"
 #include "BufferStateLayer.h"
 #include "ColorLayer.h"
@@ -113,6 +115,10 @@
         return mCreateNativeWindowSurface(producer);
     }
 
+    std::unique_ptr<compositionengine::CompositionEngine> createCompositionEngine() override {
+        return compositionengine::impl::createCompositionEngine();
+    }
+
     sp<BufferQueueLayer> createBufferQueueLayer(const LayerCreationArgs&) override {
         // TODO: Use test-fixture controlled factory
         return nullptr;
@@ -148,6 +154,10 @@
             std::function<std::unique_ptr<surfaceflinger::NativeWindowSurface>(
                     const sp<IGraphicBufferProducer>&)>;
     CreateNativeWindowSurfaceFunction mCreateNativeWindowSurface;
+
+    using CreateCompositionEngineFunction =
+            std::function<std::unique_ptr<compositionengine::CompositionEngine>()>;
+    CreateCompositionEngineFunction mCreateCompositionEngine;
 };
 
 } // namespace surfaceflinger::test