diff --git a/addons/xterm-addon-webgl/test/WebglRenderer.test.ts b/addons/xterm-addon-webgl/test/WebglRenderer.test.ts
index 5fc5d300..4da9d346 100644
--- a/addons/xterm-addon-webgl/test/WebglRenderer.test.ts
+++ b/addons/xterm-addon-webgl/test/WebglRenderer.test.ts
@@ -7,6 +7,7 @@ import test from '@playwright/test';
 import { strictEqual } from 'assert';
 import { injectSharedRendererTests } from '../../../out-test/playwright/SharedRendererTests';
 import { ITestContext, createTestContext, openTerminal } from '../../../out-test/playwright/TestUtils';
+import { platform } from 'os';
 
 let ctx: ITestContext;
 const ctxWrapper: { value: ITestContext } = { value: undefined } as any;
@@ -22,6 +23,12 @@ test.beforeAll(async ({ browser }) => {
 test.afterAll(async () => await ctx.page.close());
 
 test.describe('WebGL Renderer Integration Tests', async () => {
+  // HACK: webgl2 is often not supported in headless firefox on Linux
+  // https://github.com/microsoft/playwright/issues/11566
+  if (platform() === 'linux') {
+    test.skip(({ browserName }) => browserName === 'firefox');
+  }
+
   test('dispose removes renderer canvases', async function(): Promise<void> {
     strictEqual(await ctx.page.evaluate(`document.querySelectorAll('.xterm canvas').length`), 2);
     await ctx.page.evaluate(`addon.dispose()`);
diff --git a/test/playwright/Renderer.test.ts b/test/playwright/Renderer.test.ts
index 8050001f..17c8b6e1 100644
--- a/test/playwright/Renderer.test.ts
+++ b/test/playwright/Renderer.test.ts
@@ -16,7 +16,7 @@ test.beforeAll(async ({ browser }) => {
 });
 test.afterAll(async () => await ctx.page.close());
 
-test.describe('DOM Renderer Integration Tests', async () => {
+test.describe('DOM Renderer Integration Tests', () => {
   injectSharedRendererTests(ctxWrapper);
 });