diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 8e8a5cd..3fabd8f 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -919,6 +919,7 @@
     msg "build: default config with memory buffer allocator enabled"
     scripts/config.pl set MBEDTLS_MEMORY_BUFFER_ALLOC_C
     scripts/config.pl set MBEDTLS_MEMORY_BACKTRACE
+    scripts/config.pl set MBEDTLS_PLATFORM_MEMORY
     CC=gcc cmake .
     make