diff --git a/pudb/debugger.py b/pudb/debugger.py
index c001581b76894b6879746fd9b0ec2d202e30a447..d1c4854ddb751b930246484e525396b49d7dbc29 100644
--- a/pudb/debugger.py
+++ b/pudb/debugger.py
@@ -44,7 +44,7 @@ from pudb.py3compat import PY3, raw_input, execfile
 CONFIG = load_config()
 save_config(CONFIG)
 
-HELP_TEXT = """\
+HELP_TEXT = r"""\
 Welcome to PuDB, the Python Urwid debugger.
 -------------------------------------------
 
diff --git a/pudb/lowlevel.py b/pudb/lowlevel.py
index 744c723414d1576acaa094642a112a151ec211de..d84281290cd0cbc1fb498b6c0f9176ca0240c28d 100644
--- a/pudb/lowlevel.py
+++ b/pudb/lowlevel.py
@@ -116,7 +116,7 @@ def lookup_module(filename):
 # the main idea stolen from Python 3.1's tokenize.py, by Ka-Ping Yee
 
 import re
-cookie_re = re.compile(b"^\s*#.*coding[:=]\s*([-\w.]+)")
+cookie_re = re.compile(br"^\s*#.*coding[:=]\s*([-\w.]+)")
 from codecs import lookup, BOM_UTF8
 
 
diff --git a/pudb/source_view.py b/pudb/source_view.py
index fbad0f041c29be0da0c11bd1cb1871f364914e10..3c01b5779aa2d5faad468ed281e7d019b2edc5d3 100644
--- a/pudb/source_view.py
+++ b/pudb/source_view.py
@@ -347,8 +347,8 @@ class ArgumentParser(object):
                 self.state = ParseState.found_open_paren
                 self.paren_level = 1
         else:
-            if ((token is self.t.Name) or
-                    (token is self.t.Name.Builtin.Pseudo and s == 'self')):
+            if ((token is self.t.Name)
+                    or (token is self.t.Name.Builtin.Pseudo and s == 'self')):
                 return self.t.Token.Argument
             elif token is self.t.Punctuation and s == ')':
                 self.paren_level -= 1