After installing Simpletest i got multiple exception messages while running my tests.

I tried it on multiple hosts, same result.

Undefined index: field_meeting_location workflow_fields.module 454 _workflow_fields_get_fields()
Only variable references should be returned by reference workflow_fields.module 478 _workflow_fields_find_element()

Is it normal getting them?

I have no idea if this is related to workflow fields or simpletest