diff --git a/tests/configs/user-config-zeroize-memset.h b/tests/configs/user-config-zeroize-memset.h
deleted file mode 100644
index 270d12584..000000000
--- a/tests/configs/user-config-zeroize-memset.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* crypto_config.h modifier that defines mbedtls_platform_zeroize() to be
- * memset(), so that the compile can check arguments for us.
- * Used for testing.
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
- */
-
-#include <string.h>
-
-/* Define _ALT so we don't get the built-in implementation. The test code will
- * also need to define MBEDTLS_TEST_DEFINES_ZEROIZE so we don't get the
- * declaration. */
-#define MBEDTLS_PLATFORM_ZEROIZE_ALT
-
-#define mbedtls_platform_zeroize(buf, len) memset(buf, 0, len)