Run cargo test in CI only on newer Rust versions

.github/workflows/build-and-test.yml

@@ -49,12 +49,15 @@ jobs:
       # running through some hard-to-time code paths. loom testing is not included since it is not
       # compatible nor make any sense together with sleeping.
       - name: Test with artificial delay
+        # Some dev-dependencies pull in transitive dependencies with an MSRV higher than ours
+        if: ${{ matrix.rust != '1.65.0' }}
         shell: bash
         run: RUSTFLAGS+="--cfg oneshot_test_delay" cargo hack --feature-powerset --exclude-all-features test
 
       # Compile the library against loom to do correctness testing.
       # `--features loom` must be given so that only feature powerset combinations including loom are tested.
       - name: Test with loom
+        if: ${{ matrix.rust != '1.65.0' }}
         shell: bash
         run: |
           RUSTFLAGS+="--cfg oneshot_loom" LOOM_MAX_BRANCHES=100000 \