diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 1e5cd65..1a3a04b 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -2178,6 +2178,7 @@
     scripts/config.py unset MBEDTLS_PLATFORM_SNPRINTF_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
     scripts/config.py unset MBEDTLS_PLATFORM_NV_SEED_ALT
     scripts/config.py unset MBEDTLS_ENTROPY_NV_SEED
     scripts/config.py unset MBEDTLS_FS_IO