diff --git a/master/buildbot/changes/svnpoller.py b/master/buildbot/changes/svnpoller.py
index 9ed635eaedb..1022a8655d7 100644
--- a/master/buildbot/changes/svnpoller.py
+++ b/master/buildbot/changes/svnpoller.py
@@ -57,7 +57,7 @@ def split_file_branches(path):
 
 def split_file_projects_branches(path):
     # turn projectname/trunk/subdir/file.c into dict(project=projectname, branch=trunk, path=subdir/file.c)
-    if not "/" in path:
+    if "/" not in path:
         return None
     project, path = path.split("/", 1)
     f = split_file_branches(path)
@@ -108,8 +108,8 @@ def __init__(self, svnurl, split_file=None,
 
         self.revlinktmpl = revlinktmpl
 
-        self.environ = os.environ.copy()  # include environment variables
-                                         # required for ssh-agent auth
+        # include environment variables required for ssh-agent auth
+        self.environ = os.environ.copy()
 
         self.svnbin = svnbin
         self.histmax = histmax
@@ -361,7 +361,7 @@ def create_changes(self, new_logentries):
                 if where:
                     branch = where.get("branch", None)
                     filename = where["path"]
-                    if not branch in branches:
+                    if branch not in branches:
                         branches[branch] = {'files': [], 'number_of_directories': 0}
                     if filename == "":
                         # root directory of branch
diff --git a/master/buildbot/test/unit/test_changes_svnpoller.py b/master/buildbot/test/unit/test_changes_svnpoller.py
index 92bcc555897..4d177920ca3 100644
--- a/master/buildbot/test/unit/test_changes_svnpoller.py
+++ b/master/buildbot/test/unit/test_changes_svnpoller.py
@@ -387,7 +387,7 @@ def makeInfoExpect(self, password='bbrocks'):
         if password is not None:
             args.append('--password=' + password)
         return gpo.Expect(*args)
-                          
+
     def makeLogExpect(self, password='bbrocks'):
         args = ['svn', 'log', '--xml', '--verbose', '--non-interactive',
                 '--username=dustin']