Index: test/tsan/dl_iterate_phdr.cc
===================================================================
--- test/tsan/dl_iterate_phdr.cc
+++ test/tsan/dl_iterate_phdr.cc
@@ -3,6 +3,9 @@
 
 // If we mention TSAN_OPTIONS, the test won't run from test_output.sh script.
 
+// dl_iterate_phdr only exists on Linux and FreeBSD.
+// UNSUPPORTED: darwin
+
 #ifdef BUILD_SO
 
 #include "test.h"