diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
new file mode 100644
index 000000000..875ce10b4
--- /dev/null
+++ b/.github/workflows/linux.yml
@@ -0,0 +1,90 @@
+name: CI (Linux)
+
+on: [push, pull_request]
+
+jobs:
+  build_and_test:
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - 1.39.0 # MSRV
+          - stable
+          - nightly
+
+    name: ${{ matrix.version }} - x86_64-unknown-linux-gnu
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@master
+
+      - name: Install ${{ matrix.version }}
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.version }}-x86_64-unknown-linux-gnu
+          profile: minimal
+          override: true
+
+      - name: Generate Cargo.lock
+        uses: actions-rs/cargo@v1
+        with:
+          command: generate-lockfile
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ matrix.version }}-x86_64-unknown-linux-gnu-cargo-registry-trimmed-${{ hashFiles('**/Cargo.lock') }}
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ matrix.version }}-x86_64-unknown-linux-gnu-cargo-index-trimmed-${{ hashFiles('**/Cargo.lock') }}
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ matrix.version }}-x86_64-unknown-linux-gnu-cargo-build-trimmed-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: check build
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all --bins --examples --tests
+
+      - name: tests
+        uses: actions-rs/cargo@v1
+        timeout-minutes: 40
+        with:
+          command: test
+          args: --all --all-features --no-fail-fast -- --nocapture
+
+      - name: tests (actix-http)
+        uses: actions-rs/cargo@v1
+        timeout-minutes: 40
+        with:
+          command: test
+          args: --package=actix-http --no-default-features --features=rustls -- --nocapture
+
+      - name: tests (awc)
+        uses: actions-rs/cargo@v1
+        timeout-minutes: 40
+        with:
+          command: test
+          args: --package=awc --no-default-features --features=rustls -- --nocapture
+
+      - name: Generate coverage file
+        if: matrix.version == 'stable' && (github.ref == 'master' || github.event_name == 'pull_request')
+        run: |
+          cargo install cargo-tarpaulin
+          cargo tarpaulin --out Xml
+      - name: Upload to Codecov
+        if: matrix.version == 'stable' && (github.ref == 'master' || github.event_name == 'pull_request')
+        uses: codecov/codecov-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: cobertura.xml
+
+      - name: Clear the cargo caches
+        run: |
+          cargo install cargo-cache --no-default-features --features ci-autoclean
+          cargo-cache
diff --git a/.github/workflows/upload-doc.yml b/.github/workflows/upload-doc.yml
new file mode 100644
index 000000000..388ae3704
--- /dev/null
+++ b/.github/workflows/upload-doc.yml
@@ -0,0 +1,35 @@
+name: Upload documentation
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: github.repository == 'actix/actix-web'
+
+    steps:
+      - uses: actions/checkout@master
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable-x86_64-unknown-linux-gnu
+          profile: minimal
+          override: true
+
+      - name: check build
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --no-deps --all-features
+
+      - name: Tweak HTML
+        run: echo "<meta http-equiv=refresh content=0;url=os_balloon/index.html>" > target/doc/index.html
+
+      - name: Upload documentation
+        run: |
+          git clone https://github.com/davisp/ghp-import.git
+          ./ghp-import/ghp_import.py -n -p -f -m "Documentation upload" -r https://${{ secrets.GITHUB_TOKEN }}@github.com/"${{ github.repository }}.git" target/doc
\ No newline at end of file
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 36b224ba6..5fd785fad 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -56,3 +56,4 @@ jobs:
                 --skip=test_slow_request
                 --skip=test_connection_force_close
                 --skip=test_connection_server_close
+                --skip=test_connection_wait_queue_force_close
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index f10f82a48..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,61 +0,0 @@
-language: rust
-sudo: required
-dist: trusty
-
-cache:
-  # cargo: true
-  apt: true
-
-matrix:
-  include:
-    - rust: stable
-    - rust: beta
-    - rust: nightly-2019-11-20
-  allow_failures:
-    - rust: nightly-2019-11-20
-
-env:
-  global:
-    # - RUSTFLAGS="-C link-dead-code"
-    - OPENSSL_VERSION=openssl-1.0.2
-
-before_install:
-  - sudo add-apt-repository -y ppa:0k53d-karl-f830m/openssl
-  - sudo apt-get update -qq
-  - sudo apt-get install -y openssl libssl-dev libelf-dev libdw-dev cmake gcc binutils-dev libiberty-dev
-
-before_cache: |
-  if [[ "$TRAVIS_RUST_VERSION" == "nightly-2019-11-20" ]]; then
-    RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install --version 0.6.11 cargo-tarpaulin
-  fi
-
-# Add clippy
-before_script:
-  - export PATH=$PATH:~/.cargo/bin
-
-script:
-  - cargo update
-  - cargo check --all --no-default-features
-  - |
-    if [[ "$TRAVIS_RUST_VERSION" == "stable" || "$TRAVIS_RUST_VERSION" == "beta" ]]; then
-      cargo test --all-features --all -- --nocapture
-      cd actix-http; cargo test --no-default-features --features="rustls" -- --nocapture; cd ..
-      cd awc; cargo test --no-default-features --features="rustls" -- --nocapture; cd ..
-    fi
-
-# Upload docs
-after_success:
-  - |
-    if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_PULL_REQUEST" = "false" && "$TRAVIS_BRANCH" == "master" && "$TRAVIS_RUST_VERSION" == "stable" ]]; then
-      cargo doc --no-deps --all-features &&
-      echo "<meta http-equiv=refresh content=0;url=os_balloon/index.html>" > target/doc/index.html &&
-      git clone https://github.com/davisp/ghp-import.git &&
-      ./ghp-import/ghp_import.py -n -p -f -m "Documentation upload" -r https://"$GH_TOKEN"@github.com/"$TRAVIS_REPO_SLUG.git" target/doc &&
-      echo "Uploaded documentation"
-    fi
-  - |
-    if [[ "$TRAVIS_RUST_VERSION" == "nightly-2019-11-20" ]]; then
-        taskset -c 0 cargo tarpaulin --out Xml --all --all-features
-        bash <(curl -s https://codecov.io/bash)
-        echo "Uploaded code coverage"
-    fi
diff --git a/actix-files/src/error.rs b/actix-files/src/error.rs
index 49a46e58d..9b30cbaa2 100644
--- a/actix-files/src/error.rs
+++ b/actix-files/src/error.rs
@@ -5,6 +5,7 @@ use derive_more::Display;
 #[derive(Display, Debug, PartialEq)]
 pub enum FilesError {
     /// Path is not a directory
+    #[allow(dead_code)]
     #[display(fmt = "Path is not a directory. Unable to serve static files")]
     IsNotDirectory,
 
diff --git a/actix-http/src/extensions.rs b/actix-http/src/extensions.rs
index d85ca184d..5114ce140 100644
--- a/actix-http/src/extensions.rs
+++ b/actix-http/src/extensions.rs
@@ -28,33 +28,30 @@ impl Extensions {
 
     /// Check if container contains entry
     pub fn contains<T: 'static>(&self) -> bool {
-        self.map.get(&TypeId::of::<T>()).is_some()
+        self.map.contains_key(&TypeId::of::<T>())
     }
 
     /// Get a reference to a type previously inserted on this `Extensions`.
     pub fn get<T: 'static>(&self) -> Option<&T> {
         self.map
             .get(&TypeId::of::<T>())
-            .and_then(|boxed| (&**boxed as &(dyn Any + 'static)).downcast_ref())
+            .and_then(|boxed| boxed.downcast_ref())
     }
 
     /// Get a mutable reference to a type previously inserted on this `Extensions`.
     pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T> {
         self.map
             .get_mut(&TypeId::of::<T>())
-            .and_then(|boxed| (&mut **boxed as &mut (dyn Any + 'static)).downcast_mut())
+            .and_then(|boxed| boxed.downcast_mut())
     }
 
     /// Remove a type from this `Extensions`.
     ///
     /// If a extension of this type existed, it will be returned.
     pub fn remove<T: 'static>(&mut self) -> Option<T> {
-        self.map.remove(&TypeId::of::<T>()).and_then(|boxed| {
-            (boxed as Box<dyn Any + 'static>)
-                .downcast()
-                .ok()
-                .map(|boxed| *boxed)
-        })
+        self.map
+            .remove(&TypeId::of::<T>())
+            .and_then(|boxed| boxed.downcast().ok().map(|boxed| *boxed))
     }
 
     /// Clear the `Extensions` of all inserted extensions.
@@ -70,6 +67,92 @@ impl fmt::Debug for Extensions {
     }
 }
 
+#[test]
+fn test_remove() {
+    let mut map = Extensions::new();
+
+    map.insert::<i8>(123);
+    assert!(map.get::<i8>().is_some());
+
+    map.remove::<i8>();
+    assert!(map.get::<i8>().is_none());
+}
+
+#[test]
+fn test_clear() {
+    let mut map = Extensions::new();
+
+    map.insert::<i8>(8);
+    map.insert::<i16>(16);
+    map.insert::<i32>(32);
+
+    assert!(map.contains::<i8>());
+    assert!(map.contains::<i16>());
+    assert!(map.contains::<i32>());
+
+    map.clear();
+
+    assert!(!map.contains::<i8>());
+    assert!(!map.contains::<i16>());
+    assert!(!map.contains::<i32>());
+
+    map.insert::<i8>(10);
+    assert_eq!(*map.get::<i8>().unwrap(), 10);
+}
+
+#[test]
+fn test_integers() {
+    let mut map = Extensions::new();
+
+    map.insert::<i8>(8);
+    map.insert::<i16>(16);
+    map.insert::<i32>(32);
+    map.insert::<i64>(64);
+    map.insert::<i128>(128);
+    map.insert::<u8>(8);
+    map.insert::<u16>(16);
+    map.insert::<u32>(32);
+    map.insert::<u64>(64);
+    map.insert::<u128>(128);
+    assert!(map.get::<i8>().is_some());
+    assert!(map.get::<i16>().is_some());
+    assert!(map.get::<i32>().is_some());
+    assert!(map.get::<i64>().is_some());
+    assert!(map.get::<i128>().is_some());
+    assert!(map.get::<u8>().is_some());
+    assert!(map.get::<u16>().is_some());
+    assert!(map.get::<u32>().is_some());
+    assert!(map.get::<u64>().is_some());
+    assert!(map.get::<u128>().is_some());
+}
+
+#[test]
+fn test_composition() {
+    struct Magi<T>(pub T);
+
+    struct Madoka {
+        pub god: bool,
+    }
+
+    struct Homura {
+        pub attempts: usize,
+    }
+
+    struct Mami {
+        pub guns: usize,
+    }
+
+    let mut map = Extensions::new();
+
+    map.insert(Magi(Madoka { god: false }));
+    map.insert(Magi(Homura { attempts: 0 }));
+    map.insert(Magi(Mami { guns: 999 }));
+
+    assert!(!map.get::<Magi<Madoka>>().unwrap().0.god);
+    assert_eq!(0, map.get::<Magi<Homura>>().unwrap().0.attempts);
+    assert_eq!(999, map.get::<Magi<Mami>>().unwrap().0.guns);
+}
+
 #[test]
 fn test_extensions() {
     #[derive(Debug, PartialEq)]
diff --git a/awc/tests/test_rustls_client.rs b/awc/tests/test_rustls_client.rs
index 1d7eb7bc5..8863dfcbe 100644
--- a/awc/tests/test_rustls_client.rs
+++ b/awc/tests/test_rustls_client.rs
@@ -11,6 +11,7 @@ use futures::future::ok;
 use open_ssl::ssl::{SslAcceptor, SslFiletype, SslMethod, SslVerifyMode};
 use rust_tls::ClientConfig;
 
+#[allow(unused)]
 fn ssl_acceptor() -> SslAcceptor {
     // load ssl keys
     let mut builder = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
diff --git a/examples/uds.rs b/examples/uds.rs
index 77f245d99..06aa87f4d 100644
--- a/examples/uds.rs
+++ b/examples/uds.rs
@@ -1,6 +1,6 @@
-use actix_web::{
-    get, middleware, web, App, Error, HttpRequest, HttpResponse, HttpServer,
-};
+use actix_web::{get, web, HttpRequest};
+#[cfg(unix)]
+use actix_web::{middleware, App, Error, HttpResponse, HttpServer};
 
 #[get("/resource1/{name}/index.html")]
 async fn index(req: HttpRequest, name: web::Path<String>) -> String {
@@ -8,6 +8,7 @@ async fn index(req: HttpRequest, name: web::Path<String>) -> String {
     format!("Hello: {}!\r\n", name)
 }
 
+#[cfg(unix)]
 async fn index_async(req: HttpRequest) -> Result<&'static str, Error> {
     println!("REQ: {:?}", req);
     Ok("Hello world!\r\n")