diff --git a/tests/utils.h b/tests/utils.h
index 5014ef7..5085a7a 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -25,6 +25,8 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#include <bionic/macros.h>
+
 #include <atomic>
 #include <string>
 #include <regex>
@@ -66,14 +68,6 @@
 
 #define SKIP_WITH_HWASAN if (running_with_hwasan()) GTEST_SKIP()
 
-static inline void* untag_address(void* addr) {
-#if defined(__LP64__)
-  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>