diff --git a/test/web-test-runner.config.js b/test/web-test-runner.config.js
index 45e18856..9d50f44c 100644
--- a/test/web-test-runner.config.js
+++ b/test/web-test-runner.config.js
@@ -12,7 +12,7 @@ export default {
   hostname: '127.0.0.1',
   testsStartTimeout: 45000,
   browserStartTimeout: 120000,
-  testsFinishTimeout: 450000,
+  testsFinishTimeout: 600000,
   concurrentBrowsers: 3,
   concurrency: 1, // see https://github.com/modernweb-dev/web/issues/2706
   coverage: false,