diff --git a/bonobo/config/configurables.py b/bonobo/config/configurables.py
index bf6df76..6be2b29 100644
--- a/bonobo/config/configurables.py
+++ b/bonobo/config/configurables.py
@@ -5,6 +5,7 @@ __all__ = [
     'Option',
 ]
 
+
 class ConfigurableMeta(type):
     """
     Metaclass for Configurables that will add options to a special __options__ dict.
diff --git a/bonobo/config/options.py b/bonobo/config/options.py
index c0a3fd0..2ea67f9 100644
--- a/bonobo/config/options.py
+++ b/bonobo/config/options.py
@@ -26,5 +26,3 @@ class Option:
 
     def __set__(self, inst, value):
         inst.__options_values__[self.name] = self.type(value) if self.type else value
-
-
diff --git a/bonobo/io/csv.py b/bonobo/io/csv.py
index 58b863c..4922b43 100644
--- a/bonobo/io/csv.py
+++ b/bonobo/io/csv.py
@@ -55,7 +55,7 @@ class CsvReader(CsvHandler, FileReader):
 
         for row in reader:
             if len(row) != field_count:
-                raise ValueError('Got a line with %d fields, expecting %d.' % (len(row), field_count,))
+                raise ValueError('Got a line with %d fields, expecting %d.' % (len(row), field_count, ))
 
             yield dict(zip(headers.value, row))
 
diff --git a/bonobo/util/objects.py b/bonobo/util/objects.py
index 3b228dd..bb06cc4 100644
--- a/bonobo/util/objects.py
+++ b/bonobo/util/objects.py
@@ -129,10 +129,10 @@ class ValueHolder:
         return divmod(other, self.value)
 
     def __pow__(self, other):
-        return self.value ** other
+        return self.value**other
 
     def __rpow__(self, other):
-        return other ** self.value
+        return other**self.value
 
     def __ipow__(self, other):
         self.value **= other
diff --git a/tests/test_config.py b/tests/test_config.py
index e6d3916..3f17a53 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -18,6 +18,7 @@ class MyHarderConfigurable(MyConfigurable):
 class MyBetterConfigurable(MyConfigurable):
     required_str = Option(str, required=False, default='kaboom')
 
+
 class MyConfigurableUsingPositionalOptions(MyConfigurable):
     first = Option(str, required=True, positional=True)
     second = Option(str, required=True, positional=True)
@@ -142,4 +143,3 @@ def test_service_dependency_unavailable():
 
 def test_option_positional():
     o = MyConfigurableUsingPositionalOptions('1', '2', '3', required_str='hello')
-
diff --git a/tests/util/test_objects.py b/tests/util/test_objects.py
index 93928d4..8f15f71 100644
--- a/tests/util/test_objects.py
+++ b/tests/util/test_objects.py
@@ -51,6 +51,3 @@ def test_valueholder():
     assert y == x
     assert y is not x
     assert repr(x) == repr(y) == repr(43)
-
-
-