Error executing tests in a new typescript project

[ghidello]

I'm submitting a bug report

• Library Version:
  0.27.0

Please tell us about your environment:

• Operating System:
  Windows 10

• Node Version:
  7.7.2

• NPM Version:
  4.1.2

• Browser:
  all

• Language:
  TypeScript 2.2

Current behavior:
Running the command au test I receive the following error

TypeError: Cannot read property 'join' of undefined
at karma (E:\Work\Aurelia\ts\aurelia_project\tasks\test.ts:17:38)

Expected/desired behavior:

• Steps to reproduce
  Create a new project selecting typescript as a language and accepting all the other default choices. Execute the au test command.

• What is the expected behavior?
  The CLI should execute the tests without errors.

• Proposed solution
  I guess that the 17th line in aurelia_project\tasks\test.ts should be changed from import path from 'path'; to import * as path from 'path'; or import {join} from 'path'; (in the latter case line 18th should be changed accordingly).