diff --git a/Modules/_testcapi/code.c b/Modules/_testcapi/code.c
index 588dc67971ea5a..84c668cd6b3b00 100644
--- a/Modules/_testcapi/code.c
+++ b/Modules/_testcapi/code.c
@@ -92,7 +92,11 @@ test_code_extra(PyObject* self, PyObject *Py_UNUSED(callable))
         goto finally;
     }
     assert ((uintptr_t)extra == 77);
-
+    // Revert to initial code extra value.
+    res = PyUnstable_Code_SetExtra(test_func_code, code_extra_index, NULL);
+    if (res < 0) {
+        goto finally;
+    }
     result = Py_NewRef(Py_None);
 finally:
     Py_XDECREF(test_module);