Setting a timeout for Gauntlet tests

The Unreal Gauntlet documentation says you can run a Gauntlet test like so:

RunUAT.bat RunUnreal -test=UE.TargetAutomation -runtest=Mytest.one -project=MyProject -build=<Path/To/My/Package/Build>

However, when I try to run a gauntlet test with a -MaxDuration, that value is not actually applied to the Gauntlet test, and the test times out after 600s. (the default)

Is there a way I can set MaxDuration via the command line?

RunUAT.bat RunUnreal -test=UE.TargetAutomation -runtest=Mytest.one -project=MyProject -build=<Path/To/My/Package/Build> -MaxDuration=999

I know it’s possible to create a custom automation node, rather than use UE.TargetAutomation. It just seems to me it should work in this fashion.