diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..4cab1f4
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7f2a9a4..bb2d680 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,9 +9,10 @@ on:
 jobs:
   run-checks:
     strategy:
+      fail-fast: false
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11']
-        test-os: [ubuntu-latest]
+        test-os: [ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.test-os }}
     defaults:
@@ -38,12 +39,12 @@ jobs:
         run: ./script/typing/check
 
       - name: Test
-        run: ./run-tests
+        run: SHELL=$SHELL ./run-tests
 
   action-check:
     strategy:
       matrix:
-        test-os: [ubuntu-latest]
+        test-os: [ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.test-os }}
     defaults:
diff --git a/tests.py b/tests.py
index f0db43b..4d08700 100755
--- a/tests.py
+++ b/tests.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import os
 import sys
 import shutil
 import tempfile
@@ -42,7 +43,7 @@ def assertProcessSnapshot(
                     '--files',
                     *target_files,
                     '--',
-                    'bash',
+                    os.environ.get('SHELL', 'bash'),  # Cope with windows
                     str(script),
                 ],
                 capture_output=True,