diff --git a/scripts/rust_pre_commit.sh b/scripts/rust_pre_commit.sh
index 00c571c1e..2931d5d95 100755
--- a/scripts/rust_pre_commit.sh
+++ b/scripts/rust_pre_commit.sh
@@ -1,20 +1,20 @@
 #!/usr/bin/env bash
 
 set -e
 
 source $HOME/.cargo/env 
 
 PATHS="services/commtest"
 
 cargo > /dev/null
 
 for PATH in $PATHS; do
   pushd $PATH
   echo "formatting $PATH..."
-  cargo fmt
+  cargo fmt --all -- --check
   echo "checking $PATH..."
   cargo check
   popd # $PATH
 done
 
 echo "done formatting"