diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 348f69e..9095916 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,7 +28,7 @@ jobs:
         uses: actions-rust-lang/setup-rust-toolchain@v1
 
       - name: Cargo fmt
-        run: cargo fmt --all -- --check
+        run: cargo +nightly fmt --all -- --check
 
   cache-polkadot:
     name: Build and cache Polkadot binaries on ${{ matrix.os }}