Add test

test/integration/fixtures/global-teardown-error.js

@@ -0,0 +1,9 @@
+'use strict'
+
+const { it } = require('../../../lib/mocha');
+
+it('should pass', () => {});
+
+exports.mochaTeardown = async function () {
+    throw new Error('Teardown problem')
+}

test/integration/global-teardown-errors.spec.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const { spawnSync } = require('child_process');
+const { resolve} = require('path');
+const { expect } = require('chai');
+
+describe('global teardown errors', () => {
+  it('should fail with non-zero exit code and report the teardown error', () => {
+
+    const testFile = resolve(__dirname, '../fixtures/global-teardown-errors.js');
+
+    const result = spawnSync(process.execPath, [
+      './bin/mocha',
+      testFile,
+      '--reporter', 'spec'
+    ], { encoding: 'utf-8' });
+
+    expect(result.status).to.equal(1);
+    expect(result.stdout).to.include('Global Teardown Error:');
+    expect(result.stdout).to.include('Teardown problem');
+  });
+});