diff --git a/tests/configs/config-wrapper-malloc-0-null.h b/tests/configs/user-config-malloc-0-null.h
similarity index 82%
rename from tests/configs/config-wrapper-malloc-0-null.h
rename to tests/configs/user-config-malloc-0-null.h
index 622ac57..366dfc4 100644
--- a/tests/configs/config-wrapper-malloc-0-null.h
+++ b/tests/configs/user-config-malloc-0-null.h
@@ -1,4 +1,4 @@
-/* config.h wrapper that forces calloc(0) to return NULL.
+/* config.h modifier that forces calloc(0) to return NULL.
  * Used for testing.
  */
 /*
@@ -18,11 +18,6 @@
  *  limitations under the License.
  */
 
-#ifndef MBEDTLS_CONFIG_H
-/* Don't #define MBEDTLS_CONFIG_H, let config.h do it. */
-
-#include "mbedtls/config.h"
-
 #include <stdlib.h>
 
 #ifndef MBEDTLS_PLATFORM_STD_CALLOC
@@ -37,5 +32,3 @@
 #define MBEDTLS_PLATFORM_MEMORY
 #define MBEDTLS_PLATFORM_STD_CALLOC custom_calloc
 #endif
-
-#endif /* MBEDTLS_CONFIG_H */
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index bd7c6ec..470cd91 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -2822,7 +2822,7 @@
 component_test_malloc_0_null () {
     msg "build: malloc(0) returns NULL (ASan+UBSan build)"
     scripts/config.py full
-    make CC=gcc CFLAGS="'-DMBEDTLS_CONFIG_FILE=\"$PWD/tests/configs/config-wrapper-malloc-0-null.h\"' $ASAN_CFLAGS -O" LDFLAGS="$ASAN_CFLAGS"
+    make CC=gcc CFLAGS="'-DMBEDTLS_USER_CONFIG_FILE=\"$PWD/tests/configs/user-config-malloc-0-null.h\"' $ASAN_CFLAGS -O" LDFLAGS="$ASAN_CFLAGS"
 
     msg "test: malloc(0) returns NULL (ASan+UBSan build)"
     make test