Add the "pytester" plugin to get the "testdir" fixture

Author: mdmintz

seleniumbase/plugins/pytest_plugin.py

@@ -8,6 +8,7 @@
 from seleniumbase.core import log_helper
 from seleniumbase.core import proxy_helper
 from seleniumbase.fixtures import constants
+pytest_plugins = ["pytester"]  # Adds the "testdir" fixture
 
 
 def pytest_addoption(parser):