diff --git a/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt b/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt
index c41eb6af84..e8bc5d4c6f 100644
--- a/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt
+++ b/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt
@@ -12,3 +12,5 @@ VideoSendStreamTest.CanReconfigureToUseStartBitrateAbovePreviousMax
 VideoSendStreamTest.ReconfigureBitratesSetsEncoderBitratesCorrectly
 # https://code.google.com/p/webrtc/issues/detail?id=4979
 EndToEndTest.AssignsTransportSequenceNumbers
+# Flaky: https://bugs.chromium.org/p/webrtc/issues/detail?id=5225
+BitrateEstimatorTest.SwitchesToASTThenBackToTOFForVideo