diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e492af..554873e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,7 @@ jobs:
       - run: cargo test --workspace --exclude thiserror_no_std_test
       - run: cargo test --manifest-path tests/no-std/Cargo.toml
         if: matrix.rust != '1.70.0'
+      - run: cargo test --no-default-features
       - uses: actions/upload-artifact@v4
         if: matrix.rust == 'nightly' && always()
         with: