diff --git a/src/_pytest/pytester.py b/src/_pytest/pytester.py
index f16e5f19a..d519162b1 100644
--- a/src/_pytest/pytester.py
+++ b/src/_pytest/pytester.py
@@ -1172,7 +1172,6 @@ class Testdir(object):
         if plugins:
             args = ("-p", plugins[0]) + args
         args = self._getpytestargs() + args
-
         return self.run(*args, timeout=timeout)
 
     def spawn_pytest(self, string, expect_timeout=10.0):