RunFilter Smoke hangs

Using the RunFilter cmd line variation:
%WORKSPACE%\Unreal\Engine\Binaries\Win64\UE4Editor-Cmd.exe %Project% -stdout -unattended -testexit=“Automation Test Queue Empty” -execcmds=“automation RunFilter Smoke”

Using the above command line works except that it hangs and never exits at the end.

Running using the method: “Runtests testa+testb+testc” -testexit=“Automation Test Queue Empty” works correctly and the job terminates.

I believe the testexit is the issue but can’t seem to find the correct value to make it exit correctly. Anybody else run across this?