diff --git a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp
--- a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook.cpp
@@ -6,6 +6,9 @@
 // Must not be implemented, no other reason to install interceptors.
 // XFAIL: ubsan
 
+// FIXME: Test fails on darwin x86_64 with tsan
+// UNSUPPORTED: darwin && tsan
+
 #include <stdlib.h>
 #include <unistd.h>
 #include <sanitizer/allocator_interface.h>
diff --git a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp
--- a/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/malloc_hook_get_allocated_size_fast.cpp
@@ -6,6 +6,9 @@
 // Must not be implemented, no other reason to install interceptors.
 // XFAIL: ubsan
 
+// FIXME: Test fails on darwin x86_64 with tsan
+// UNSUPPORTED: darwin && tsan
+
 #include <assert.h>
 #include <sanitizer/allocator_interface.h>
 #include <stdlib.h>