Backslashes doesn't work when specifying the paths with python.testing.unittestArgs

The following discovers the tests,

  "python.testing.unittestArgs": [
    "-v",
    "-s",
    "C:/Users/karraj/Desktop/Desktop/test_demo/src",
    "-p",
    "*test*.py"
  ],

whereas

  "python.testing.unittestArgs": [
    "-v",
    "-s",
    "C:\\Users\\karraj\\Desktop\\Desktop\\test_demo\\src",
    "-p",
    "*test*.py"
  ],

doesn't.

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