diff --git a/compiler-rt/test/tsan/Darwin/gcd-groups-destructor.mm b/compiler-rt/test/tsan/Darwin/gcd-groups-destructor.mm
index 05c65c04b665..60b8f3a0a48e 100644
--- a/compiler-rt/test/tsan/Darwin/gcd-groups-destructor.mm
+++ b/compiler-rt/test/tsan/Darwin/gcd-groups-destructor.mm
@@ -1,4 +1,4 @@
-// RUN: %clangxx_tsan %s -o %t -framework Foundation
+// RUN: %clangxx_tsan %s -o %t -framework Foundation -D__ALLOW_STDC_ATOMICS_IN_CXX__
 // RUN: %run %t 2>&1 | FileCheck %s
 
 #import <Foundation/Foundation.h>
diff --git a/compiler-rt/test/tsan/Darwin/libcxx-shared-ptr-stress.mm b/compiler-rt/test/tsan/Darwin/libcxx-shared-ptr-stress.mm
index e5cd7edc6bb7..9e4c142e83e1 100644
--- a/compiler-rt/test/tsan/Darwin/libcxx-shared-ptr-stress.mm
+++ b/compiler-rt/test/tsan/Darwin/libcxx-shared-ptr-stress.mm
@@ -1,4 +1,4 @@
-// RUN: %clangxx_tsan %s -o %t -framework Foundation
+// RUN: %clangxx_tsan %s -o %t -framework Foundation -D__ALLOW_STDC_ATOMICS_IN_CXX__
 // RUN: %run %t 2>&1 | FileCheck %s
 
 #import <Foundation/Foundation.h>
diff --git a/compiler-rt/test/tsan/Darwin/xpc-race.mm b/compiler-rt/test/tsan/Darwin/xpc-race.mm
index 872c9ee73e13..77d39ac92ea0 100644
--- a/compiler-rt/test/tsan/Darwin/xpc-race.mm
+++ b/compiler-rt/test/tsan/Darwin/xpc-race.mm
@@ -1,4 +1,4 @@
-// RUN: %clangxx_tsan %s -o %t -framework Foundation
+// RUN: %clangxx_tsan %s -o %t -framework Foundation -D__ALLOW_STDC_ATOMICS_IN_CXX__
 // RUN: %deflake %run %t 2>&1 | FileCheck %s
 
 // UNSUPPORTED: ios