'Assert' is an ambiguous reference

markcle

Hi All

I'm writing tests for an on-prem AL extension. I'm getting this message when creating a variable

var
        Assert: Codeunit Assert;

"'Assert' is an ambiguous reference between 'Assert' defined in 'Application, Microsoft, 13.9.33838.0' and 'Assert' defined in 'Test, Microsoft, 13.9.33838.0'."

How can I specify which version of assert to use?

Thanks

Mark