Comment 7 for bug 1643432

Again:

14:10:11 11: /<<BUILDDIR>>/mir-0.26.0+xenial3594bzr3941/tests/acceptance-tests/test_nested_mir.cpp:722: Failure
14:10:11 11: Actual function call count doesn't match EXPECT_CALL(*mock_session_mediator_report, session_disconnect_called(_))...
14:10:11 11: Expected: to be called once
14:10:11 11: Actual: never called - unsatisfied and active
14:10:11 11: [ FAILED ] NestedServer.nested_platform_connects_and_disconnects (7719 ms)

https://mir-jenkins.ubuntu.com/job/build-2-binpkg-mir/arch=i386,compiler=gcc,platform=mesa,release=xenial+overlay/3563/consoleFull