diff --git a/.github/workflows/validate-tests.yml b/.github/workflows/validate-tests.yml
new file mode 100644
index 0000000000..16b4be49a7
--- /dev/null
+++ b/.github/workflows/validate-tests.yml
@@ -0,0 +1,33 @@
+name: Validate Tests
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - 'release-*'
+  workflow_dispatch:
+
+jobs:
+  validate:
+    name: Validate
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup JS
+        uses: ./.github/actions/setup-js
+
+      - name: yarn gentest-validate
+        run: yarn gentest-validate
+
+      - name: yarn gentest
+        run: yarn gentest -h
+
+      - name: Check for modified tests
+        run: |
+          if [[ -n $(git status -s) ]]; then
+            git status -s
+            echo "yarn gentest modified these tests. Please run yarn gentest to resolve."
+            exit 1
+          fi
diff --git a/gentest/gentest-driver.ts b/gentest/gentest-driver.ts
index 4192b38105..ff61686356 100644
--- a/gentest/gentest-driver.ts
+++ b/gentest/gentest-driver.ts
@@ -33,6 +33,7 @@ process.chdir(path.dirname(process.argv[1]));
 const argv = minimist(process.argv.slice(2));
 const specificFixture = argv.f || argv.fixture;
 const suspend = argv.s || argv.suspend;
+const headless = argv.h || argv.headless;
 
 let fixtures = await fs.readdir('./fixtures');
 try {
@@ -52,6 +53,7 @@ options.addArguments(
   '--window-position=0,0',
   '--hide-scrollbars',
 );
+headless && options.addArguments('--headless');
 options.setLoggingPrefs({
   browser: 'ALL',
   performance: 'ALL',