diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a3bcb06..852a376 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -56,7 +56,7 @@ jobs:
       - name: Install Rust toolchain.
         run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain ${{ env.RUST_VERSION }}
       - name: Run tests.
-        run: cargo test --all-features
+        run: cargo test --all-features --release
 
   # Check code style
   clippy: