diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index c07ef34..d70ed77 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -3006,6 +3006,9 @@
     cd "$MBEDTLS_ROOT_DIR"
     unset MBEDTLS_ROOT_DIR
 }
+support_test_cmake_as_subdirectory () {
+    support_test_cmake_out_of_source
+}
 
 component_test_zeroize () {
     # Test that the function mbedtls_platform_zeroize() is not optimized away by