Cannot run tests in IE11 with custom window dimensions

[kurlayev]

I want to run tests through karma in IE11 and open browser window with width 1200 and height 800 pixels. But after searching on internet I haven't found a solution how to do it.
As I know IE11 can not be started from command line with size options passed in. (Chrome can do it!)
As workaround I use next code that I put on the start of my test suite's code (executes one time before running all tests):
window.resizeTo(1200, 800);
It yields me a desired result when I start karma in --no-single-run mode (config property singleRun = false). In that case when I click DEBUG button new browser window is opened and resized when resizeTo() is invoked. Tests are success.
But when I start karma in --single-run mode this workaround doesn't work! And IE11 window doesn't resized. And tests were failed!
Please, tell me how to run tests in IE11 with my window dimensions?

OS: Windows 7 64x
Karma version: 1.6.0
karma-ie-launcher version: 1.0.0
NodeJs version: 6.9.2