diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 000000000..3c53eb39d
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# Use Unix line endings in all text files.
+* text=auto eol=lf
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9abc12911..7816ca7cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,14 @@ on:
 
 jobs:
   ci:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-22.04
+          - windows-2022
+          - macOS-12
 
     steps:
       - name: Setup repo