[Reg 3.5->3.6] Unit tests do not output a thing in Application output pane

The user wants to get a verbose output into Application output pane on, how her unit tests are run. In Qt Creator 3.5.1 everything works just fine:

Starting test run...
********* Start testing of TestQString *********
Config: Using QtTest library 5.5.1, Qt 5.5.1 (x86_64-little_endian-llp64 shared (dynamic) debug build; by MSVC 2013)
PASS   : TestQString::initTestCase()
PASS   : TestQString::toUpper()
PASS   : TestQString::toSomething()
PASS   : TestQString::testSomething1()
PASS   : TestQString::testSomething2()
PASS   : TestQString::testSomething3()
PASS   : TestQString::testSomething4()
PASS   : TestQString::cleanupTestCase()

The problem seems to exist only with Qt Creator 3.6.0:

Starting test run...

As the one can see, there second output is quite compendious.

The expected behavior with Qt Creator 3.6.0:
The Application output pane must contain the same output as it is in Qt Creator 3.5.1 on, how tests are run.

What actually happens:
Very short output can be seen in Application output pane.

Steps to reproduce:

1. Make sure, you are using Windows machine and it does have both Qt Creators installed (3.5.1 and 3.6.0). The Kit used in original testing was MSVC2013. Install it if you do not have one.
2. Download and unpack the application attached
3. First, run it with Qt Creator 3.5.1. Everything works normal, the output on how the tests are run is in the Application output pane
4. Run the same application with the same Kit with Qt Creator 3.6.0. Only very brief output can be seen in the Application output pane.