prepare a own pytest.collect fake module in oder to remove the nested builtin namespaces

_pytest/compat.py

@@ -254,6 +254,29 @@ else:
             return v.encode('ascii', errors)
 
 
+COLLECT_FAKEMODULE_ATTRIBUTES = (
+    'Collector',
+    'Module',
+    'Generator',
+    'Function',
+    'Instance',
+    'Session',
+    'Item',
+    'Class',
+    'File',
+    '_fillfuncargs',
+)
+
+
+def _setup_collect_fakemodule():
+    from types import ModuleType
+    import pytest
+    pytest.collect = ModuleType('pytest.collect')
+    pytest.collect.__all__ = []  # used for setns
+    for attr in COLLECT_FAKEMODULE_ATTRIBUTES:
+        setattr(pytest.collect, attr, getattr(pytest, attr))
+
+
 if _PY2:
     from py.io import TextIO as CaptureIO
 else:

pytest.py

@@ -47,4 +47,7 @@ from _pytest.mark import MARK_GEN as mark
 from _pytest.skipping import xfail
 set_trace = __pytestPDB.set_trace
 
+
+from _pytest.compat import _setup_collect_fakemodule
 _preloadplugins() # to populate pytest.* namespace so help(pytest) works
+_setup_collect_fakemodule()