diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 52dc0605..04ad50b7 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -9,9 +9,54 @@ on:
 env:
   CARGO_TERM_COLOR: always
   # Pinned toolchain for linting and benchmarks
-  ACTIONS_LINTS_TOOLCHAIN: 1.47.0
+  ACTIONS_LINTS_TOOLCHAIN: 1.53.0
+  EXTRA_FEATURES: "protobuf push process"
 
 jobs:
+  tests-stable:
+    name: "Tests, stable toolchain"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: "stable"
+          default: true
+      - name: cargo build
+        run: cargo build
+      - name: cargo test
+        run: cargo test
+      - name: cargo test (extra features)
+        run: cargo test --no-default-features --features="${{ env['EXTRA_FEATURES'] }}"
+      - name: cargo package
+        run : cargo package && cargo package --manifest-path static-metric/Cargo.toml
+  tests-other-channels:
+    name: "Tests, unstable toolchain"
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    strategy:
+      matrix:
+        channel:
+          - "beta"
+          - "nightly"
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.channel }}
+          default: true
+      - name: cargo build
+        run: cargo build
+      - name: cargo test
+        run: cargo test
+      - name: cargo build (static-metric)
+        run: cargo build -p prometheus-static-metric --examples --no-default-features --features="${{ env['EXTRA_FEATURES'] }}"
+      - name: cargo test (static-metric)
+        run: cargo test -p prometheus-static-metric --no-default-features --features="${{ env['EXTRA_FEATURES'] }}"
   linting:
     name: "Lints, pinned toolchain"
     runs-on: ubuntu-latest
@@ -21,15 +66,13 @@ jobs:
       - name: Install toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: ${{ env['ACTIONS_LINTS_TOOLCHAIN']  }}
+          toolchain: ${{ env['ACTIONS_LINTS_TOOLCHAIN'] }}
           default: true
           components: rustfmt, clippy
       - name: cargo fmt (check)
         run: cargo fmt --all -- --check -l
       - name: cargo clippy
-        run: cargo clippy --all -- -D clippy
-      - name: cargo package
-        run : cargo package && cargo package --manifest-path static-metric/Cargo.toml
+        run: cargo clippy --all -- -D clippy::all
   criterion:
     name: "Benchmarks (criterion)"
     runs-on: ubuntu-latest
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 843aa7d0..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,41 +0,0 @@
-language: rust
-sudo: false
-
-os:
- - linux
- - osx
-
-addons:
-  apt:
-    packages:
-      - gcc-multilib
-
-env:
-  matrix:
-    - FEATURES="protobuf push process"
-    - FEATURES=""
-  global:
-    - RUSTFLAGS=--deny=warnings
-    - ARCH=i686
-
-# Must be present for matrix.
-rust:
-
-matrix:
-  fast_finish: true
-  include:
-  - rust: nightly
-  - rust: nightly
-    env: FEATURES="nightly protobuf push process"
-  - rust: beta
-  - rust: stable
-  allow_failures:
-  - rust: nightly
-
-script:
-  - cargo test --no-default-features --features="$FEATURES"
-  - |
-    if [ $TRAVIS_RUST_VERSION = 'nightly' ]; then
-        cargo build -p prometheus-static-metric --examples --no-default-features --features="$FEATURES"
-        cargo test -p prometheus-static-metric --no-default-features --features="$FEATURES"
-    fi
diff --git a/src/registry.rs b/src/registry.rs
index 3aa0d22e..d204d8e0 100644
--- a/src/registry.rs
+++ b/src/registry.rs
@@ -93,7 +93,7 @@ impl RegistryCore {
         let mut id_set = Vec::new();
         let mut collector_id: u64 = 0;
         for desc in c.desc() {
-            if id_set.iter().find(|id| **id == desc.id).is_none() {
+            if !id_set.iter().any(|id| *id == desc.id) {
                 id_set.push(desc.id);
                 collector_id = collector_id.wrapping_add(desc.id);
             }
diff --git a/static-metric/src/util.rs b/static-metric/src/util.rs
index 2a41c6a9..182b8685 100644
--- a/static-metric/src/util.rs
+++ b/static-metric/src/util.rs
@@ -9,8 +9,8 @@ pub fn is_local_metric(metric_type: Ident) -> bool {
 
 pub fn to_non_local_metric_type(metric_type: Ident) -> Ident {
     let metric_type_str = metric_type.to_string();
-    if metric_type_str.starts_with("Local") {
-        Ident::new(&metric_type_str[5..], Span::call_site())
+    if let Some(stripped) = metric_type_str.strip_prefix("Local") {
+        Ident::new(stripped, Span::call_site())
     } else {
         metric_type
     }