No need to setup import path in test.base

py.test does that for us.

test/base.py

@@ -9,7 +9,6 @@ import functools
 
 test_dir = dirname(abspath(__file__))
 root_dir = dirname(test_dir)
-sys.path.insert(0, root_dir)
 
 import pytest
 

test/refactor.py

@@ -10,7 +10,6 @@ import traceback
 import re
 import itertools
 
-from . import base  # required to setup import path
 from jedi._compatibility import reduce
 import jedi
 from jedi import refactoring

test/run.py

@@ -97,17 +97,12 @@ Tests look like this::
     abc
 """
 import os
-import sys
 import re
 
-from . import base  # required to setup import path
 import jedi
 from jedi._compatibility import unicode, StringIO, reduce, is_py25
 
 
-sys.path.pop(0)  # pop again, because it might affect the completion
-
-
 TEST_COMPLETIONS = 0
 TEST_DEFINITIONS = 1
 TEST_ASSIGNMENTS = 2