diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
index 0f0c455..f1ac0d7 100644
--- a/.github/workflows/actionlint.yml
+++ b/.github/workflows/actionlint.yml
@@ -1,15 +1,20 @@
-name: Lint GitHub Actions workflows
-on: [push, pull_request]
+name: actionlint
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+
+# If new code is pushed to a PR branch, then cancel in progress workflows for that PR. Ensures that
+# we don't waste CI time
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   actionlint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
-      - name: Download actionlint
-        id: get_actionlint
-        run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
-        shell: bash
-      - name: Check workflow files
-        run: ${{ steps.get_actionlint.outputs.executable }} -color
-        shell: bash
+      - name: actionlint
+        uses: raven-actions/actionlint@v2.0.1
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index a34c803..ab7fd81 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -45,8 +45,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # Get early warning of new lints which are regularly introduced in beta channels.
-        toolchain: [stable, beta]
+        toolchain: [nightly-2025-06-29]
     steps:
       - uses: actions/checkout@v4
         with:
@@ -56,6 +55,7 @@ jobs:
         with:
           toolchain: ${{ matrix.toolchain }}
           components: clippy
+      - run: cargo clippy --version
       - name: cargo clippy
         run: cargo clippy --all-targets --all-features
         env:
@@ -106,10 +106,17 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: true
+      - name: Install nightly
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: nightly
+      - name: Generate minimal lockfile
+        run: cargo generate-lockfile -Z minimal-versions
       - name: Install ${{ matrix.msrv }}
         uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.msrv }}
+      - run: rustc --version
       - name: cargo +${{ matrix.msrv }} check
         run: cargo check
         env:
diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
index be1ef5c..0bc2261 100644
--- a/.github/workflows/safety.yml
+++ b/.github/workflows/safety.yml
@@ -84,4 +84,5 @@ jobs:
         timeout-minutes: 220
         uses: model-checking/kani-github-action@v1
         with:
-          kani-version: '0.54.0'
+          kani-version: '0.63.0'
+          args: --fail-fast
diff --git a/src/utils/arbitrary.rs b/src/utils/arbitrary.rs
index 4e785a5..6b4e165 100644
--- a/src/utils/arbitrary.rs
+++ b/src/utils/arbitrary.rs
@@ -11,7 +11,7 @@ use proptest::sample::SizeRange;
 type Mat<T> = MatBase<Vec<T>, T>;
 
 impl<T> Mat<T> {
-    pub fn to_ref(&self) -> MatRef<T> {
+    pub fn to_ref<'a>(&'a self) -> MatRef<'a, T> {
         MatRef::from_parts(
             self.nrows(),
             self.ncols(),
diff --git a/tests/comparison.rs b/tests/comparison.rs
index 70de0d5..3c73d85 100644
--- a/tests/comparison.rs
+++ b/tests/comparison.rs
@@ -25,7 +25,7 @@ fn bench_aarch64_f32() {
         let t_neon = display_duration(time_with(&neon_kernel, n, TRIES));
         let t_faer = display_duration(time_with(&faer_kernel, n, TRIES));
         let t_mt = display_duration(time_with(&mt_kernel, n, TRIES));
-        println!("{0:>4} {1:>14} {2:>14} {3:>14}", n, t_neon, t_faer, t_mt);
+        println!("{n:>4} {t_neon:>14} {t_faer:>14} {t_mt:>14}");
     }
 }
 
@@ -49,7 +49,7 @@ fn display_duration(t: Duration) -> String {
             format!("{}.{}{}", num.trunc(), fract, unit)
         }
     };
-    let s = format!("{:?}", t);
+    let s = format!("{t:?}");
 
     if s.contains("ms") {
         pretty(s, "ms")
diff --git a/tests/neon.rs b/tests/neon.rs
index 1b6afc3..284dc70 100644
--- a/tests/neon.rs
+++ b/tests/neon.rs
@@ -93,6 +93,6 @@ impl<'a> TestCase<'a> {
             param.pack_sizes,
             &mut packing_buf,
         );
-        assert_eq!(actual.as_slice(), param.expect, "{:?}", self);
+        assert_eq!(actual.as_slice(), param.expect, "{self:?}");
     }
 }