diff --git a/scripts/rust_pre_commit.sh b/scripts/rust_pre_commit.sh
--- a/scripts/rust_pre_commit.sh
+++ b/scripts/rust_pre_commit.sh
@@ -11,7 +11,7 @@
 for PATH in $PATHS; do
   pushd $PATH
   echo "formatting $PATH..."
-  cargo fmt
+  cargo fmt --all -- --check
   echo "checking $PATH..."
   cargo check
   popd # $PATH