Increase number of tests to force running in band

Author: rubennorte

e2e/__tests__/fatalWorkerError.test.ts

@@ -15,7 +15,7 @@ const DIR = path.resolve(os.tmpdir(), 'fatal-worker-error');
 beforeEach(() => cleanup(DIR));
 afterAll(() => cleanup(DIR));
 
-const NUMBER_OF_TESTS_TO_FORCE_USING_WORKERS = 25;
+const NUMBER_OF_TESTS_TO_FORCE_USING_WORKERS = 40;
 
 test('fails a test that terminates the worker with a fatal error', () => {
   const testFiles = {