diff --git a/tools/valgrind-webrtc/gtest_exclude/rtc_unittests.gtest-memcheck.txt b/tools/valgrind-webrtc/gtest_exclude/rtc_unittests.gtest-memcheck.txt
index 72a0c29442..092bd2843c 100644
--- a/tools/valgrind-webrtc/gtest_exclude/rtc_unittests.gtest-memcheck.txt
+++ b/tools/valgrind-webrtc/gtest_exclude/rtc_unittests.gtest-memcheck.txt
@@ -14,3 +14,5 @@ P2PTransportChannelMultihomedTest.TestDrain
 PortAllocatorTest.TestDisableAllPorts
 PortAllocatorTest.TestGetAllPortsNoUdpSockets
 PortAllocatorTest.TestGetAllPortsNoUdpSocketsNoTcpListen
+# Flaky; WebRTC issue 5136
+P2PTransportChannelMultihomedTest.TestFailoverControlledSide