diff --git a/.github/workflows/validate-tests.yml b/.github/workflows/validate-tests.yml
new file mode 100644
index 00000000..16b4be49
--- /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 97d43adf..0dc5dc01 100644
--- a/gentest/gentest-driver.ts
+++ b/gentest/gentest-driver.ts
@@ -31,6 +31,7 @@ function addSignatureToSourceCode(sourceCode: string): string {
 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;
 
 const gentestDir = dirname(fileURLToPath(import.meta.url));
 const yogaDir = dirname(gentestDir);
@@ -54,6 +55,7 @@ options.addArguments(
   '--window-position=0,0',
   '--hide-scrollbars',
 );
+headless && options.addArguments('--headless');
 options.setLoggingPrefs({
   browser: 'ALL',
   performance: 'ALL',