diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 9fe45a3..f26ac8a 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -11,13 +11,18 @@ env:
 
 jobs:
   ci:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         rust:
           - stable
           - beta
           - nightly
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
@@ -36,7 +41,7 @@ jobs:
           command: test
           args: --features all --verbose
       - uses: actions-rs/cargo@v1
-        if: ${{ matrix.rust == 'nightly' }}
+        if: ${{ matrix.rust == 'nightly' && matrix.os == 'ubuntu-latest' }}
         with:
           command: fmt
           args: --verbose --all -- --check
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 6087033..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-environment:
-  matrix:
-    - TARGET: x86_64-pc-windows-msvc
-      OTHER_TARGET: i686-pc-windows-msvc
-      MAKE_TARGETS: test-unit-x86_64-pc-windows-msvc
-      TOOLCHAIN: stable
-    - TARGET: x86_64-pc-windows-msvc
-      OTHER_TARGET: i686-pc-windows-msvc
-      MAKE_TARGETS: test-unit-x86_64-pc-windows-msvc
-      TOOLCHAIN: beta
-    - TARGET: x86_64-pc-windows-msvc
-      OTHER_TARGET: i686-pc-windows-msvc
-      MAKE_TARGETS: test-unit-x86_64-pc-windows-msvc
-      TOOLCHAIN: nightly
-
-install:
-  - appveyor-retry appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - rustup-init.exe -y --default-host x86_64-pc-windows-msvc --default-toolchain %TOOLCHAIN%
-  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
-  - rustup target add %OTHER_TARGET%
-  - rustc -V
-  - cargo -V
-
-clone_depth: 1
-
-build: false
-
-test_script:
-  - cargo test --features all