Does not find tests without layer when called with -k

[sallner]

transferred from bitbucket:

Michael Howitz created an issue 2015-09-03
If there is a test class which does not have a layer and the tester wants to run only this test class using -k py.test does not find the class and does not run its tests. The same seems to be true for the test methods on such a class.

[icemac]

Possibly current versions of gocept.pytestlayer even do not at all find doctests without having a layer being set on the DocTestSuite.

[icemac]

The README.rst says: "A doctest.DocFileSuite which does not have a layer is silently skipped. Use the built-in doctest abilities of pytest to run those tests."