@@ -82,32 +82,37 @@ jobs:
 os: [ubuntu-latest, windows-latest, macOS-latest]
 steps:
 - uses: actions/checkout@v4
-# on non-msrv runs, just download rust
 - uses: dtolnay/rust-toolchain@master
 with:
 toolchain: ${{matrix.rust.toolchain}}
 id: rust-toolchain
-if: matrix.rust.name != 'MSRV'
 # on msrv runs, use stable to generate Cargo.lock then downgrade
-- uses: dtolnay/rust-toolchain@stable
-if: matrix.rust.name == 'MSRV'
 - run: cargo --config 'resolver.incompatible-rust-versions="fallback"' update
 - run: echo "rust-version=$(tomlq -r '.workspace.package."rust-version"' Cargo.toml)" >>$_OUTPUT
 id: msrv
 if: matrix.rust.name == 'MSRV'
 - uses: dtolnay/rust-toolchain@master
 with:
 toolchain: ${{steps.msrv.outputs.rust-version}}
-id: rust-toolchain
+id: msrv-toolchain
 if: matrix.rust.name == 'MSRV'
-# the rest is independent of whether msrv is used
+# on non-msrv runs, use one cache key ...
 - uses: actions/cache@v4
 with:
 path: |
 ~/.cargo/git
 ~/.cargo/registry
 target
  key: "${{runner.os}} Rust ${{steps.rust-toolchain.outputs.cachekey}}"
+# ... and on msrv runs, use another
+- uses: actions/cache@v4
+with:
+path: |
+~/.cargo/git
+~/.cargo/registry
+target
+ key: "${{runner.os}} Rust ${{steps.msrv-toolchain.outputs.cachekey}}"
+# finally we can run tests
 - run: cargo test --lib --locked
 - run: cargo test --doc --locked