diff --git a/.gitattributes b/.gitattributes
index 159b7455..fa723415 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -6,3 +6,8 @@
 *.css text eol=lf
 *.html text eol=lf
 *.md text eol=lf
+*.yml text eol=lf
+*.graphql text eol=lf
+.eslintrc text eol=lf
+.prettierrc text eol=lf
+.babelrc text eol=lf
diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 7a04b16d..acaf56ed 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: windows-latest
 
     steps:
       - uses: actions/checkout@v2
@@ -17,3 +17,7 @@ jobs:
       - run: yarn build:all
       - run: yarn lint:all
       - run: yarn test:all
+      - working-directory: ./extension
+        run: yarn install --immutable
+      - working-directory: ./extension
+        run: yarn test
diff --git a/extension/jest.config.js b/extension/jest.config.js
index 9de297e2..f8d7c3ae 100644
--- a/extension/jest.config.js
+++ b/extension/jest.config.js
@@ -1,3 +1,3 @@
 module.exports = {
-  setupFiles: ['<rootDir>/test/setup.js'],
+  setupFilesAfterEnv: ['<rootDir>/test/setup.js'],
 };
diff --git a/extension/test/setup.js b/extension/test/setup.js
index a980a80a..c66500f4 100644
--- a/extension/test/setup.js
+++ b/extension/test/setup.js
@@ -4,3 +4,5 @@ import Enzyme from 'enzyme';
 import Adapter from 'enzyme-adapter-react-15.4';
 
 Enzyme.configure({ adapter: new Adapter() });
+
+jest.setTimeout(50000);