There are now quite a few tests that set up a 'forked' project of their own for testing. Here they are, with the properties of the forked projects they create: user_id, name, description, parent_id.

• test_pagure_lib_git.py:
  1, test2, test project #2, 1
1, test3, test project #2, 1
• test_pagure_lib_model.py:
  1, test, test project #1, 1
• test_pagure_lib_notify_email.py:
  2, test, test project #1, 1
• test_pagure_lib.py:
  2, test, test project #1, 1
2, test2, test project #2, 2
2, test, test project #1, 1
• test_zzz_pagure_flask_ui_old_commit.py:
  1, test3, test project #3, 1

There are various other tests that deal with forked projects and forking, but they all do something more in-depth and probably wouldn't use a shared fixture.

It would probably make sense to add one or two forked projects to the set of projects created by create_projects in tests/__init__.py, and adjust the listed tests to use those.