diff --git a/test/jbuild b/test/jbuild
index 776c2febc..7917744c2 100644
--- a/test/jbuild
+++ b/test/jbuild
@@ -1,5 +1,6 @@
 (executables
  ((names (test))
+  (flags (:standard -safe-string))
   (preprocess (pps (ppx_let ppx_driver.runner)))))