diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0f0b9e3..5efba3a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
-        operating-system: ["ubuntu-18.04", "ubuntu-20.04", "macos-10.15", "macos-11", "macos-12"]
+        operating-system: ["ubuntu-18.04", "ubuntu-20.04", "macos-10.15", "macos-11", "macos-12", "windows-2016", "windows-2019", "windows-2022"]
         swift-version: ["5.3.3", "5.4.3", "5.5.3", "5.6.1"]
         include:
           - operating-system: "ubuntu-18.04"
diff --git a/.github/workflows/units.yml b/.github/workflows/units.yml
index eb314c8..fa61990 100644
--- a/.github/workflows/units.yml
+++ b/.github/workflows/units.yml
@@ -16,7 +16,7 @@ jobs:
   units:
     strategy:
       matrix:
-        runs-on: ["ubuntu-latest", "macos-latest"]
+        runs-on: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{ matrix.runs-on }}
     steps:
     - uses: actions/checkout@master