diff --git a/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test.h b/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test.h
--- a/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test.h
+++ b/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test.h
@@ -45,4 +45,10 @@
 #define SKIP_NO_DEBUG(T) DISABLED_##T
 #endif
 
+#if SCUDO_FUCHSIA
+// The zxtest library provides a default main function that does the same thing
+// for Fuchsia builds.
+#define SCUDO_NO_TEST_MAIN
+#endif
+
 extern bool UseQuarantine;
diff --git a/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test_main.cpp b/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test_main.cpp
--- a/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test_main.cpp
+++ b/compiler-rt/lib/scudo/standalone/tests/scudo_unit_test_main.cpp
@@ -45,9 +45,7 @@
          "dealloc_type_mismatch=" DEALLOC_TYPE_MISMATCH;
 }
 
-// The zxtest library provides a default main function that does the same thing
-// for Fuchsia builds.
-#if !SCUDO_FUCHSIA
+#if !defined(SCUDO_NO_TEST_MAIN)
 int main(int argc, char **argv) {
   EnableMemoryTaggingIfSupported();
   testing::InitGoogleTest(&argc, argv);