diff --git a/compiler-rt/test/tsan/munmap_invalid.cpp b/compiler-rt/test/tsan/munmap_invalid.cpp
--- a/compiler-rt/test/tsan/munmap_invalid.cpp
+++ b/compiler-rt/test/tsan/munmap_invalid.cpp
@@ -1,5 +1,9 @@
 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
 
+// Fails on Darwin bots:
+// https://green.lab.llvm.org/green//job/clang-stage1-RA/25954/consoleFull#-1417328700a1ca8a51-895e-46c6-af87-ce24fa4cd561
+// UNSUPPORTED: darwin
+
 #include "test.h"
 #include <sys/mman.h>