diff --git a/tests/utils.h b/tests/utils.h
index 5fc1d93..cc1aa8c 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -66,6 +66,16 @@
 
 #define SKIP_WITH_HWASAN if (running_with_hwasan()) { return; }
 
+static inline void* untag_address(void* addr) {
+#if defined(__LP64__)
+  if (running_with_hwasan()) {
+    constexpr uintptr_t mask = (static_cast<uintptr_t>(1) << 56) - 1;
+    addr = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(addr) & mask);
+  }
+#endif
+  return addr;
+}
+
 #if defined(__linux__)
 
 #include <sys/sysmacros.h>