diff --git a/compiler-rt/test/tsan/Darwin/debug_external.cpp b/compiler-rt/test/tsan/Darwin/debug_external.cpp
--- a/compiler-rt/test/tsan/Darwin/debug_external.cpp
+++ b/compiler-rt/test/tsan/Darwin/debug_external.cpp
@@ -42,7 +42,8 @@
   return 0;
 }
 
-void __tsan_on_report(void *report) {
+__attribute__((disable_sanitizer_instrumentation)) void
+__tsan_on_report(void *report) {
   const char *type;
   void *addr;
   void *start;
diff --git a/compiler-rt/test/tsan/Darwin/external-swift-debugging.cpp b/compiler-rt/test/tsan/Darwin/external-swift-debugging.cpp
--- a/compiler-rt/test/tsan/Darwin/external-swift-debugging.cpp
+++ b/compiler-rt/test/tsan/Darwin/external-swift-debugging.cpp
@@ -45,8 +45,8 @@
   fprintf(stderr, "Done.\n");
 }
 
-extern "C"
-void __tsan_on_report(void *report) {
+extern "C" __attribute__((disable_sanitizer_instrumentation)) void
+__tsan_on_report(void *report) {
   const char *description;
   int count;
   int stack_count, mop_count, loc_count, mutex_count, thread_count,