diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 6c70f78..f2f10b5e 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -2298,6 +2298,7 @@
     scripts/config.py unset MBEDTLS_PLATFORM_PRINTF_ALT
     scripts/config.py unset MBEDTLS_PLATFORM_FPRINTF_ALT
     scripts/config.py unset MBEDTLS_PLATFORM_SNPRINTF_ALT
+    scripts/config.py unset MBEDTLS_PLATFORM_VSNPRINTF_ALT
     scripts/config.py unset MBEDTLS_PLATFORM_TIME_ALT
     scripts/config.py unset MBEDTLS_PLATFORM_EXIT_ALT
     scripts/config.py unset MBEDTLS_PLATFORM_SETBUF_ALT