diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 2e6357a..d166573 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -20,5 +20,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - uses: Swatinem/rust-cache@v2
+      with:
+        key: rust-${{ matrix.rust }}
     - run: rustup default ${{ matrix.rust }}
     - run: cargo test --verbose