Rename TestMessage to ExampleMessage When py.test is searching for tests it detects TestMessage as a potential class with test cases because it has 'Test' in its name. Because TestMessage contains a __init__ constructor py.test returns a warning that it can't collect tests from it. Lets rename the class to ExampleMessage to avoid this issue.

def init_severity(db, cl, nodeid, newvalues):
    """Make sure severity is set on new issues"""
    if newvalues.has_key('severity') and newvalues['severity']:
        return

    normal = db.severity.lookup('normal')
    newvalues['severity'] = normal

def init(db):
    db.issue.audit('create', init_severity)