diff --git a/libs/gui/tests/BufferQueue_test.cpp b/libs/gui/tests/BufferQueue_test.cpp
index b859fcb..5aa34a5 100644
--- a/libs/gui/tests/BufferQueue_test.cpp
+++ b/libs/gui/tests/BufferQueue_test.cpp
@@ -72,6 +72,7 @@
 struct DummyConsumer : public BnConsumerListener {
     virtual void onFrameAvailable() {}
     virtual void onBuffersReleased() {}
+    virtual void onSidebandStreamChanged() {}
 };
 
 TEST_F(BufferQueueTest, AcquireBuffer_ExceedsMaxAcquireCount_Fails) {
diff --git a/libs/gui/tests/DisconnectWaiter.h b/libs/gui/tests/DisconnectWaiter.h
index 3a30a19..56e96c2 100644
--- a/libs/gui/tests/DisconnectWaiter.h
+++ b/libs/gui/tests/DisconnectWaiter.h
@@ -57,6 +57,8 @@
         }
     }
 
+    virtual void onSidebandStreamChanged() {}
+
     void finishDisconnect() {
         Mutex::Autolock lock(mMutex);
         mWaitForDisconnect = true;
diff --git a/libs/gui/tests/IGraphicBufferProducer_test.cpp b/libs/gui/tests/IGraphicBufferProducer_test.cpp
index 4d38ff5..c2653c2 100644
--- a/libs/gui/tests/IGraphicBufferProducer_test.cpp
+++ b/libs/gui/tests/IGraphicBufferProducer_test.cpp
@@ -66,6 +66,7 @@
 struct DummyConsumer : public BnConsumerListener {
     virtual void onFrameAvailable() {}
     virtual void onBuffersReleased() {}
+    virtual void onSidebandStreamChanged() {}
 };
 
 class IGraphicBufferProducerTest : public ::testing::Test {