diff --git a/.github/workflows/build-simulators.yaml b/.github/workflows/build-simulators.yaml
index 41cb94459..33e13fa9b 100644
--- a/.github/workflows/build-simulators.yaml
+++ b/.github/workflows/build-simulators.yaml
@@ -18,6 +18,7 @@ jobs:
   build-simulators:
     strategy:
       matrix:
+        os: ["ubuntu-latest", "macOS-latest", "windows-latest"]
         target: [
           bootloader,
           gantry-x,
@@ -30,7 +31,7 @@ jobs:
           pipettes-96,
         ]
     name: ${{ matrix.target }} simulator
-    runs-on: "ubuntu-20.04"
+    runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     steps:
       - name: Checkout ot3-firmware repo