diff --git a/Lib/test/test_capi/test_mem.py b/Lib/test/test_capi/test_mem.py
index 63e71501162452..21b51d133447da 100644
--- a/Lib/test/test_capi/test_mem.py
+++ b/Lib/test/test_capi/test_mem.py
@@ -183,6 +183,7 @@ class PyMemDefaultTests(PyMemDebugTests):
 
 
 @requires_subprocess()
+@support.requires_gil_enabled("PYTHONMALLOC='malloc' needs GIL build")
 @unittest.skipUnless(support.check_sanitizer(address=True),
                      'need address sanitizer')
 class AddressSanitizerTests(unittest.TestCase):