* bzrlib/tests/test_foreign.py: (register_dummy_foreign_for_test): Factored out now that we have 3 uses. (DummyForeignVcsTests): Use register_dummy_foreign_for_test.
* bzrlib/tests/blackbox/test_dpush.py: (TestDpush, TestDpushStrictMixin): Use register_dummy_foreign_for_test.