try this ci trick

.cargo/config.toml

@@ -1,5 +1,21 @@
 [alias]
 chk = "check --workspace --all-features --tests --examples --bins"
 lint = "clippy --workspace --all-features --tests --examples --bins -- -Dclippy::todo"
-ci-test = "test --workspace --all-features --lib --tests --no-fail-fast -- --nocapture"
+
 ci-doctest = "test --workspace --all-features --doc --no-fail-fast -- --nocapture"
+
+# just check the library (without dev deps)
+ci-check-lib = "hack --workspace --feature-powerset --exclude-features io-uring check"
+ci-check-lib-linux = "hack --workspace --feature-powerset check"
+
+# check everything
+ci-check = "hack --workspace --feature-powerset --exclude-features io-uring check --tests --examples"
+ci-check-linux = "hack --workspace --feature-powerset check --tests --examples"
+
+# tests avoiding io-uring feature
+ci-test = "hack test --workspace --exclude=actix-rt --exclude=actix-server --all-features --lib --tests --no-fail-fast -- --nocapture"
+ci-test-rt = "    hack --feature-powerset --exclude-features io-uring test --package=actix-rt     --lib --tests --no-fail-fast -- --nocapture"
+ci-test-server = "hack --feature-powerset --exclude-features io-uring test --package=actix-server --lib --tests --no-fail-fast -- --nocapture"
+
+# test with io-uring feature
+ci-test-linux = "test --workspace --all-features --lib --tests --no-fail-fast -- --nocapture"

.github/workflows/ci.yml

@@ -75,36 +75,40 @@ jobs:
           command: install
           args: cargo-hack
 
-      - name: check minimal
+      - name: check lib
+        if: matrix.target.os != 'ubuntu-latest'
         uses: actions-rs/cargo@v1
-        with:
+        with: { command: ci-check-lib }
-          command: hack
+      - name: check lib
-          args: check --workspace --no-default-features
+        if: matrix.target.os == 'ubuntu-latest'
-
-      - name: check minimal + tests
         uses: actions-rs/cargo@v1
-        with:
+        with: { command: ci-check-lib-linux }
-          command: hack
+      
-          args: check --workspace --no-default-features --tests --examples
-
-      - name: check default
-        uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: --workspace --tests --examples
-
       - name: check full
         # TODO: compile OpenSSL and run tests on MinGW
-        if: matrix.target.triple != 'x86_64-pc-windows-gnu'
+        if: >
+          matrix.target.os != 'ubuntu-latest'
+          && matrix.target.triple != 'x86_64-pc-windows-gnu'
         uses: actions-rs/cargo@v1
-        with:
+        with: { command: ci-check }
-          command: check
+      - name: check all
-          args: --workspace --all-features --tests --examples
+        if: matrix.target.os == 'ubuntu-latest'
+        uses: actions-rs/cargo@v1
+        with: { command: ci-check-linux }
 
       - name: tests
-        if: matrix.target.triple != 'x86_64-pc-windows-gnu'
+        if: >
+          matrix.target.os != 'ubuntu-latest'
+          && matrix.target.triple != 'x86_64-pc-windows-gnu'
         uses: actions-rs/cargo@v1
-        with: { command: ci-test }
+        run: |
+          cargo ci-test
+          cargo ci-test-rt
+          cargo ci-test-server
+      - name: tests
+        if: matrix.target.os == 'ubuntu-latest'
+        uses: actions-rs/cargo@v1
+        with: { command: ci-test-linux }
 
       - name: Generate coverage file
         if: >
@@ -120,8 +124,7 @@ jobs:
           && matrix.version == 'stable'
           && github.ref == 'refs/heads/master'
         uses: codecov/codecov-action@v1
-        with:
+        with: { file: cobertura.xml }
-          file: cobertura.xml
 
       - name: Clear the cargo caches
         run: |

actix-tls/src/lib.rs

@@ -5,6 +5,7 @@
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 #[cfg(feature = "openssl")]
+#[allow(unused_extern_crates)]
 extern crate tls_openssl as openssl;
 
 #[cfg(feature = "accept")]