diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d4c84b7bf..089d0ffd3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,12 +17,12 @@ jobs:
     - uses: actions/checkout@v2
     - run: rustup update stable && rustup default stable
     - run: rustup component add rustfmt
-    - run: cargo fmt --all -- --check
+    - run: cargo fmt --all --check
     - run: |
         for manifest in `find crates benches/benchsuite benches/capture -name Cargo.toml`
         do
           echo check fmt for $manifest
-          cargo fmt --all --manifest-path $manifest -- --check
+          cargo fmt --all --manifest-path $manifest --check
         done
 
   test: