diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
new file mode 100644
index 000000000000..3db063dea078
--- /dev/null
+++ b/.github/workflows/CI.yml
@@ -0,0 +1,132 @@
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+name: CI
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: ubuntu:20.10
+    strategy:
+      matrix:
+        rust:
+          - stable
+          - beta
+          - nightly
+          - "1.40.0"
+    steps:
+      - run: apt-get update -y
+      - run: apt-get install -y libgtk-3-dev libglib2.0-dev libgraphene-1.0-dev git xvfb curl libcairo-gobject2 libcairo2-dev
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          override: true
+      # atk
+      - name: "atk: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path atk/Cargo.toml --all-features
+      - name: "atk-sys: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path atk/sys/Cargo.toml --all-features
+      - name: "atk: build"
+        run: cargo build --manifest-path atk/Cargo.toml --all-features
+      # cairo
+      - name: "cairo: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path cairo/Cargo.toml --features "png,pdf,svg,ps,use_glib,v1_16,freetype,script,xcb,xlib,win32-surface"
+      - name: "cairo-sys: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path cairo/sys/Cargo.toml --features "png,pdf,svg,ps,use_glib,v1_16,freetype,script,xcb,xlib,win32-surface"
+      - name: "cairo: build"
+        run: cargo build --manifest-path cairo/Cargo.toml --features "png,pdf,svg,ps,use_glib,v1_16,freetype,script,xcb,xlib,win32-surface"
+      # gdk
+      - name: "gdk: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gdk/Cargo.toml --features v3_24
+      - name: "gdk: build"
+        run: cargo build --manifest-path gdk/Cargo.toml --features v3_24
+      # gdk-pixbuf
+      - name: "gdk-pixbuf: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gdk-pixbuf/Cargo.toml --all-features
+      - name: "gdk-pixbuf-sys: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gdk-pixbuf/sys/Cargo.toml --all-features
+      - name: "gdk-pixbuf: build"
+        run: cargo build --manifest-path gdk-pixbuf/Cargo.toml --all-features
+      # gdkx11
+      - name: "gdkx11: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gdkx11/Cargo.toml --all-features
+      - name: "gdkx11-sys: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gdkx11/sys/Cargo.toml --all-features
+      - name: "gdkx11: build"
+        run: cargo build --manifest-path gdkx11/Cargo.toml --all-features
+      # gio
+      - name: "gio: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gio/Cargo.toml --all-features
+      - name: "gio: build"
+        run: cargo build --manifest-path gio/Cargo.toml --all-features
+      # glib
+      - name: "glib: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path glib/Cargo.toml --all-features
+      - name: "glib: build"
+        run: cargo build --manifest-path glib/Cargo.toml --all-features
+      # glib-macros
+      - name: "glib-macros: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path glib-macros/Cargo.toml
+      - name: "glib-macros: build"
+        run: cargo build --manifest-path glib-macros/Cargo.toml
+      # graphene
+      - name: "graphene: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path graphene/Cargo.toml --all-features
+      - name: "graphene: build"
+        run: cargo build --manifest-path graphene/Cargo.toml --all-features
+      # gtk
+      - name: "gtk: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path gtk/Cargo.toml --all-features
+      - name: "gtk: build"
+        run: cargo build --manifest-path gtk/Cargo.toml --all-features
+      # pango
+      - name: "pango: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path pango/Cargo.toml --all-features
+      - name: "pango: build"
+        run: cargo build --manifest-path pango/Cargo.toml --all-features
+      # pangocairo
+      - name: "pangocairo: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path pangocairo/Cargo.toml --all-features
+      - name: "pangocairo-sys: tests"
+        run: xvfb-run --auto-servernum cargo test --manifest-path pangocairo/sys/Cargo.toml --all-features
+      - name: "pangocairo: build"
+        run: cargo build --manifest-path pangocairo/Cargo.toml --all-features
+      # examples
+      - name: "examples"
+        run: cargo build --manifest-path examples/Cargo.toml --bins --examples --all-features
+
+      - uses: bcomnes/cleanup-xvfb@v1
+
+  fmt:
+    name: rust fmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - run: rustup component add rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+  checker:
+    name: gtk-rs checker
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          repository: gtk-rs/checker
+          ref: master
+          path: checker
+      - working-directory: checker
+        run: cargo build --release
+      - run: "./checker/target/release/checker ."
+      - run: "./checker/check_init_asserts"
diff --git a/Cargo.toml b/Cargo.toml
index 51c624e445e1..4f825935b7ea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,4 +27,4 @@ members = [
   "pangocairo/sys",
 ]
 
-exclude = ["gir"]
+exclude = ["gir", "checker"]
diff --git a/gio/sys/tests/abi.rs b/gio/sys/tests/abi.rs
index 703b02899017..477e4ff19ece 100644
--- a/gio/sys/tests/abi.rs
+++ b/gio/sys/tests/abi.rs
@@ -14,7 +14,8 @@ use std::process::Command;
 use std::str;
 use tempfile::Builder;
 
-static PACKAGES: &[&str] = &["gio-2.0"];
+static PACKAGES_UNIX: &[&str] = &["gio-2.0", "gio-unix-2.0"];
+static PACKAGES_WINDOWS: &[&str] = &["gio-2.0"];
 
 #[derive(Clone, Debug)]
 struct Compiler {
@@ -22,14 +23,14 @@ struct Compiler {
 }
 
 impl Compiler {
-    pub fn new() -> Result<Compiler, Box<dyn Error>> {
+    pub fn new(packages: &[&str]) -> Result<Compiler, Box<dyn Error>> {
         let mut args = get_var("CC", "cc")?;
         args.push("-Wno-deprecated-declarations".to_owned());
         // For %z support in printf when using MinGW.
         args.push("-D__USE_MINGW_ANSI_STDIO".to_owned());
         args.extend(get_var("CFLAGS", "")?);
         args.extend(get_var("CPPFLAGS", "")?);
-        args.extend(pkg_config_cflags(PACKAGES)?);
+        args.extend(pkg_config_cflags(packages)?);
         Ok(Compiler { args })
     }
 
@@ -131,7 +132,13 @@ fn cross_validate_constants_with_c() {
         .prefix("abi")
         .tempdir()
         .expect("temporary directory");
-    let cc = Compiler::new().expect("configured compiler");
+
+    let cc = if cfg!(target_family = "windows") {
+        Compiler::new(PACKAGES_WINDOWS)
+    } else {
+        Compiler::new(PACKAGES_UNIX)
+    }
+    .expect("configured compiler");
 
     assert_eq!(
         "1",
@@ -171,7 +178,13 @@ fn cross_validate_layout_with_c() {
         .prefix("abi")
         .tempdir()
         .expect("temporary directory");
-    let cc = Compiler::new().expect("configured compiler");
+
+    let cc = if cfg!(target_family = "windows") {
+        Compiler::new(PACKAGES_WINDOWS)
+    } else {
+        Compiler::new(PACKAGES_UNIX)
+    }
+    .expect("configured compiler");
 
     assert_eq!(
         Layout {