Test-ADFS2AADOnPremRPTrustSet command has issues

[Wardo99]

When I run the following command
Test-ADFS2AADOnPremRPTrustSet -RPXMLFileDirectory "C:\adfs\apps"

I get this but the instructions or commands have no mention of what is being looked for:
PS C:\temp> Test-ADFS2AADOnPremRPTrustSet -RPXMLFileDirectory "C:\adfs\apps"

cmdlet Test-ADFSRPRuleset at command pipeline position 1
Supply values for the following parameters:
RulesetName:
KnownRules:
ResultTypeIfUnknownPattern:

[Guilourd]

same issue