diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5b325b0..92e05a5 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -8,8 +8,11 @@ on:
       - opened
       - synchronize
 jobs:
-  test-linux:
-    runs-on: ubuntu-latest
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
       - uses: mrkkrp/ormolu-action@master
diff --git a/test-code/Main b/test-code/Main
deleted file mode 100644
index c8dbf9f..0000000
--- a/test-code/Main
+++ /dev/null
@@ -1,4 +0,0 @@
-module Main (main) where
-
-main :: IO ()
-main = return ()