if (fs.existsSync(testSupportPath)) {
      let testSupportTree = new Funnel(testSupportPath, { destDir: 'test-support' });
      let lintTestSupportJsTrees = this._eachProjectAddonInvoke('lintTree', ['test-support', testSupportTree]);
      trees = trees.concat(lintTestSupportJsTrees);
    }