diff --git a/stevedore/driver.py b/stevedore/driver.py
index a14659d..b8351d4 100644
--- a/stevedore/driver.py
+++ b/stevedore/driver.py
@@ -31,7 +31,8 @@ class DriverManager(NamedExtensionManager):
             invoke_kwds=invoke_kwds,
             )
         if not self.extensions:
-            raise RuntimeError('No %r driver found, looking for %r' % (namespace, name))
+            raise RuntimeError('No %r driver found, looking for %r' %
+                               (namespace, name))
         if len(self.extensions) > 1:
             raise RuntimeError('Multiple %r drivers found: %s' %
                                (namespace,
diff --git a/stevedore/enabled.py b/stevedore/enabled.py
index 87c4aa2..620f900 100644
--- a/stevedore/enabled.py
+++ b/stevedore/enabled.py
@@ -33,11 +33,12 @@ class EnabledExtensionManager(ExtensionManager):
     def __init__(self, namespace, check_func, invoke_on_load=False,
                  invoke_args=(), invoke_kwds={}):
         self.check_func = check_func
-        super(EnabledExtensionManager, self).__init__(namespace,
-                                                      invoke_on_load=invoke_on_load,
-                                                      invoke_args=invoke_args,
-                                                      invoke_kwds=invoke_kwds,
-                                                      )
+        super(EnabledExtensionManager, self).__init__(
+            namespace,
+            invoke_on_load=invoke_on_load,
+            invoke_args=invoke_args,
+            invoke_kwds=invoke_kwds,
+            )
 
     def _load_one_plugin(self, ep, invoke_on_load, invoke_args, invoke_kwds):
         if not self.check_func(ep):
diff --git a/stevedore/named.py b/stevedore/named.py
index 19b1f06..0b0a71a 100644
--- a/stevedore/named.py
+++ b/stevedore/named.py
@@ -28,9 +28,10 @@ class NamedExtensionManager(EnabledExtensionManager):
                  invoke_on_load=False, invoke_args=(), invoke_kwds={}):
         def check(ep):
             return ep.name in names
-        super(NamedExtensionManager, self).__init__(namespace,
-                                                    check,
-                                                    invoke_on_load=invoke_on_load,
-                                                    invoke_args=invoke_args,
-                                                    invoke_kwds=invoke_kwds,
-                                                    )
+        super(NamedExtensionManager, self).__init__(
+            namespace,
+            check,
+            invoke_on_load=invoke_on_load,
+            invoke_args=invoke_args,
+            invoke_kwds=invoke_kwds,
+            )
diff --git a/tox.ini b/tox.ini
index 09d5635..e646004 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,4 +10,4 @@ deps =
 
 [testenv:pep8]
 deps = pep8
-commands = pep8 --repeat --ignore=E501,E123 --show-source stevedore setup.py
+commands = pep8 --repeat --ignore=E123 --show-source stevedore setup.py