diff --git a/compiler-rt/test/tsan/Darwin/main_tid.mm b/compiler-rt/test/tsan/Darwin/main_tid.mm
index 6dea58e53326..886880edeb2f 100644
--- a/compiler-rt/test/tsan/Darwin/main_tid.mm
+++ b/compiler-rt/test/tsan/Darwin/main_tid.mm
@@ -13,6 +13,7 @@ int __tsan_get_report_thread(void *report, unsigned long idx, int *tid,
                              unsigned long trace_size);
 }
 
+__attribute__((disable_sanitizer_instrumentation))
 void __tsan_on_report(void *report) {
   fprintf(stderr, "__tsan_on_report(%p)\n", report);
 
diff --git a/compiler-rt/test/tsan/libdispatch/dispatch_once_deadlock.c b/compiler-rt/test/tsan/libdispatch/dispatch_once_deadlock.c
index 9c7c47e9235b..8139605c753c 100644
--- a/compiler-rt/test/tsan/libdispatch/dispatch_once_deadlock.c
+++ b/compiler-rt/test/tsan/libdispatch/dispatch_once_deadlock.c
@@ -10,6 +10,8 @@
 
 long g = 0;
 long h = 0;
+
+__attribute__((disable_sanitizer_instrumentation))
 void f() {
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
@@ -18,6 +20,7 @@ void f() {
   h++;
 }
 
+__attribute__((disable_sanitizer_instrumentation))
 void __tsan_on_report() {
   fprintf(stderr, "Report.\n");
   f();