diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 12c390f..39dd7a3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -56,14 +56,13 @@ jobs:
             features: threading cgemm
             test_examples: yes_examples
 
+    name: tests/${{ matrix.target }}/${{ matrix.rust }}
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          override: true
+          targets: ${{ matrix.target }}
       - name: Install dependencies
         if: matrix.install_deps
         run: ${{ matrix.install_deps }}
@@ -104,14 +103,13 @@ jobs:
             experimental: false
             target: thumbv6m-none-eabi
 
+    name: nostd-build/${{ matrix.target }}/${{ matrix.rust }}
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          override: true
+          targets: ${{ matrix.target }}
       - name: Tests
         run: |
           cargo rustc "--target=${{ matrix.target }}" --manifest-path=ensure_no_std/Cargo.toml
@@ -128,14 +126,13 @@ jobs:
             target: aarch64-unknown-linux-gnu
             features: cgemm
 
+    name: cross_test/${{ matrix.target }}/${{ matrix.rust }}
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
         with:
           profile: minimal
-          toolchain: ${{ matrix.rust }}
-          target: ${{ matrix.target }}
-          override: true
+          targets: ${{ matrix.target }}
       - name: Cache cargo plugins
         id: cache
         uses: actions/cache@v1
@@ -151,10 +148,23 @@ jobs:
           MMTEST_FAST_TEST: 1
           RUSTFLAGS: -Copt-level=2
 
+  cargo-careful:
+    runs-on: ubuntu-latest
+    name: cargo-careful
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: nightly
+      - uses: Swatinem/rust-cache@v2
+      - name: Install cargo-careful
+        run: cargo install cargo-careful
+      - run: cargo careful test -Zcareful-sanitizer=thread --features=threading,cgemm
+
   miri:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Miri
         run: ci/miri.sh --features cgemm
 
diff --git a/src/ptr.rs b/src/ptr.rs
index 3193fab..3f26034 100644
--- a/src/ptr.rs
+++ b/src/ptr.rs
@@ -6,8 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![allow(unknown_lints, suspicious_auto_trait_impls)]
-
 use rawpointer::PointerExt;
 
 /// A Send + Sync raw pointer wrapper