diff --git a/compiler-rt/lib/asan/tests/asan_str_test.cc b/compiler-rt/lib/asan/tests/asan_str_test.cc
index 7f1acf27f7fb..3e969971cabc 100644
--- a/compiler-rt/lib/asan/tests/asan_str_test.cc
+++ b/compiler-rt/lib/asan/tests/asan_str_test.cc
@@ -186,7 +186,7 @@ TEST(AddressSanitizer, StrNCpyOOBTest) {
 typedef char*(*PointerToStrChr1)(const char*, int);
 typedef char*(*PointerToStrChr2)(char*, int);
 
-USED static void RunStrChrTest(PointerToStrChr1 StrChr) {
+UNUSED static void RunStrChrTest(PointerToStrChr1 StrChr) {
   size_t size = Ident(100);
   char *str = MallocAndMemsetString(size);
   str[10] = 'q';
@@ -202,7 +202,7 @@ USED static void RunStrChrTest(PointerToStrChr1 StrChr) {
   EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBReadMessage(0));
   free(str);
 }
-USED static void RunStrChrTest(PointerToStrChr2 StrChr) {
+UNUSED static void RunStrChrTest(PointerToStrChr2 StrChr) {
   size_t size = Ident(100);
   char *str = MallocAndMemsetString(size);
   str[10] = 'q';
diff --git a/compiler-rt/lib/sanitizer_common/tests/sanitizer_test_utils.h b/compiler-rt/lib/sanitizer_common/tests/sanitizer_test_utils.h
index dabd61f1ddbe..433f8c184b70 100644
--- a/compiler-rt/lib/sanitizer_common/tests/sanitizer_test_utils.h
+++ b/compiler-rt/lib/sanitizer_common/tests/sanitizer_test_utils.h
@@ -17,14 +17,20 @@
 
 #include <stdint.h>
 
-#if defined(_WIN32)
+#if defined(_MSC_VER)
 # define NOINLINE __declspec(noinline)
-# define USED
 #else  // defined(_WIN32)
 # define NOINLINE __attribute__((noinline))
-# define USED __attribute__((used))
 #endif  // defined(_WIN32)
 
+#if !defined(_MSC_VER) || defined(__clang__)
+# define UNUSED __attribute__((unused))
+# define USED __attribute__((used))
+#else
+# define UNUSED
+# define USED
+#endif
+
 #if !defined(__has_feature)
 #define __has_feature(x) 0
 #endif