diff --git a/common/lib/xmodule/xmodule/modulestore/tests/test_mixed_modulestore.py b/common/lib/xmodule/xmodule/modulestore/tests/test_mixed_modulestore.py
index f5e34a89c7..ca746f422d 100644
--- a/common/lib/xmodule/xmodule/modulestore/tests/test_mixed_modulestore.py
+++ b/common/lib/xmodule/xmodule/modulestore/tests/test_mixed_modulestore.py
@@ -61,7 +61,7 @@ class TestMixedModuleStore(CourseComparisonTest):
     ASSET_COLLECTION = 'assetstore'
     FS_ROOT = DATA_DIR
     DEFAULT_CLASS = 'xmodule.raw_module.RawDescriptor'
-    RENDER_TEMPLATE = lambda t_n, d, ctx = None, nsp = 'main': ''
+    RENDER_TEMPLATE = lambda t_n, d, ctx=None, nsp='main': ''
 
     MONGO_COURSEID = 'MITx/999/2013_Spring'
     XML_COURSEID1 = 'edX/toy/2012_Fall'
diff --git a/common/lib/xmodule/xmodule/modulestore/tests/test_mongo.py b/common/lib/xmodule/xmodule/modulestore/tests/test_mongo.py
index c20be348cc..1622823d8e 100644
--- a/common/lib/xmodule/xmodule/modulestore/tests/test_mongo.py
+++ b/common/lib/xmodule/xmodule/modulestore/tests/test_mongo.py
@@ -54,7 +54,7 @@ COLLECTION = 'modulestore'
 ASSET_COLLECTION = 'assetstore'
 FS_ROOT = DATA_DIR  # TODO (vshnayder): will need a real fs_root for testing load_item
 DEFAULT_CLASS = 'xmodule.raw_module.RawDescriptor'
-RENDER_TEMPLATE = lambda t_n, d, ctx = None, nsp = 'main': ''
+RENDER_TEMPLATE = lambda t_n, d, ctx=None, nsp='main': ''
 
 
 class ReferenceTestXBlock(XBlock, XModuleMixin):
diff --git a/common/lib/xmodule/xmodule/modulestore/tests/test_xml_importer.py b/common/lib/xmodule/xmodule/modulestore/tests/test_xml_importer.py
index a6b227b03b..3adde6d8d2 100644
--- a/common/lib/xmodule/xmodule/modulestore/tests/test_xml_importer.py
+++ b/common/lib/xmodule/xmodule/modulestore/tests/test_xml_importer.py
@@ -28,7 +28,7 @@ class ModuleStoreNoSettings(unittest.TestCase):
     COLLECTION = 'modulestore'
     FS_ROOT = DATA_DIR
     DEFAULT_CLASS = 'xmodule.modulestore.tests.test_xml_importer.StubXBlock'
-    RENDER_TEMPLATE = lambda t_n, d, ctx = None, nsp = 'main': ''
+    RENDER_TEMPLATE = lambda t_n, d, ctx=None, nsp='main': ''
 
     modulestore_options = {
         'default_class': DEFAULT_CLASS,
diff --git a/lms/envs/test.py b/lms/envs/test.py
index 43f52dc4ea..e08f7e9bbe 100644
--- a/lms/envs/test.py
+++ b/lms/envs/test.py
@@ -377,7 +377,7 @@ FEATURES['CLASS_DASHBOARD'] = True
 #   Generated checkid_setup request to http://testserver/openid/provider/login/ with assocication {HMAC-SHA1}{51d49995}{s/kRmA==}
 
 import openid.oidutil
-openid.oidutil.log = lambda message, level = 0: None
+openid.oidutil.log = lambda message, level=0: None
 
 PLATFORM_NAME = "edX"
 SITE_NAME = "edx.org"