diff --git a/dotdrop/comparator.py b/dotdrop/comparator.py
index 254a682..c930d3f 100644
--- a/dotdrop/comparator.py
+++ b/dotdrop/comparator.py
@@ -109,6 +109,5 @@ class Comparator:
                           opts=self.diffopts, debug=self.debug)
         if header:
             lshort = os.path.basename(left)
-            rshort = os.path.basename(right)
             diff = '=> diff \"{}\":\n{}'.format(lshort, diff)
         return diff
diff --git a/dotdrop/config.py b/dotdrop/config.py
index c2cb09b..6c68718 100644
--- a/dotdrop/config.py
+++ b/dotdrop/config.py
@@ -14,7 +14,7 @@ from dotdrop.dotfile import Dotfile
 from dotdrop.templategen import Templategen
 from dotdrop.logger import Logger
 from dotdrop.action import Action, Transform
-from dotdrop.utils import *
+from dotdrop.utils import strip_home, shell
 from dotdrop.linktypes import LinkTypes
 
 
diff --git a/dotdrop/dotdrop.py b/dotdrop/dotdrop.py
index f2f0156..52ea58d 100644
--- a/dotdrop/dotdrop.py
+++ b/dotdrop/dotdrop.py
@@ -173,7 +173,7 @@ def cmd_update(o):
     showpatch = o.update_showpatch
 
     updater = Updater(o.dotpath, o.dotfiles, o.variables,
-                      o.dry, o.safe, iskey=iskey, debug=o.debug,
+                      dry=o.dry, safe=o.safe, debug=o.debug,
                       ignore=ignore, showpatch=showpatch)
     if not iskey:
         # update paths
diff --git a/dotdrop/dotfile.py b/dotdrop/dotfile.py
index 0957690..2b3b090 100644
--- a/dotdrop/dotfile.py
+++ b/dotdrop/dotfile.py
@@ -12,8 +12,8 @@ class Dotfile:
 
     def __init__(self, key, dst, src,
                  actions={}, trans_r=None, trans_w=None,
-                 link=LinkTypes.NOLINK, cmpignore=[], noempty=False,
-                 upignore=[]):
+                 link=LinkTypes.NOLINK, cmpignore=[],
+                 noempty=False, upignore=[]):
         """constructor
         @key: dotfile key
         @dst: dotfile dst (in user's home usually)
diff --git a/dotdrop/logger.py b/dotdrop/logger.py
index bccd30e..fec1e07 100644
--- a/dotdrop/logger.py
+++ b/dotdrop/logger.py
@@ -2,7 +2,7 @@
 author: deadc0de6 (https://github.com/deadc0de6)
 Copyright (c) 2017, deadc0de6
 
-provides logging functions
+provide logging functions
 """
 
 import sys
diff --git a/dotdrop/options.py b/dotdrop/options.py
index b0319bf..5be5534 100644
--- a/dotdrop/options.py
+++ b/dotdrop/options.py
@@ -157,6 +157,7 @@ class Options:
         # the dotfiles
         self.dotfiles = self.conf.eval_dotfiles(self.profile, self.variables,
                                                 debug=self.debug).copy()
+        # the profiles
         self.profiles = self.conf.get_profiles()
 
     def _print_attr(self):
diff --git a/dotdrop/updater.py b/dotdrop/updater.py
index cffdc35..030234e 100644
--- a/dotdrop/updater.py
+++ b/dotdrop/updater.py
@@ -20,15 +20,14 @@ TILD = '~'
 
 class Updater:
 
-    def __init__(self, dotpath, dotfiles, variables, dry, safe,
-                 iskey=False, debug=False, ignore=[], showpatch=False):
+    def __init__(self, dotpath, dotfiles, variables, dry=False, safe=True,
+                 debug=False, ignore=[], showpatch=False):
         """constructor
         @dotpath: path where dotfiles are stored
         @dotfiles: dotfiles for this profile
         @variables: dictionary of variables for the templates
         @dry: simulate
         @safe: ask for overwrite if True
-        @iskey: will the update be called on keys or path
         @debug: enable debug
         @ignore: pattern to ignore when updating
         @showpatch: show patch if dotfile to update is a template
@@ -38,7 +37,6 @@ class Updater:
         self.variables = variables
         self.dry = dry
         self.safe = safe
-        self.iskey = iskey
         self.debug = debug
         self.ignore = ignore
         self.showpatch = showpatch
diff --git a/dotdrop/utils.py b/dotdrop/utils.py
index 55422a0..70b1a61 100644
--- a/dotdrop/utils.py
+++ b/dotdrop/utils.py
@@ -10,8 +10,6 @@ import tempfile
 import os
 import uuid
 import shlex
-import functools
-import operator
 import fnmatch
 from shutil import rmtree
 
diff --git a/tests-requirements.txt b/tests-requirements.txt
index 3aea72f..2172e29 100644
--- a/tests-requirements.txt
+++ b/tests-requirements.txt
@@ -2,3 +2,4 @@ pycodestyle; python_version >= '3.0'
 nose; python_version >= '3.0'
 coverage; python_version >= '3.0'
 coveralls; python_version >= '3.0'
+pyflakes; python_version >= '3.0'
diff --git a/tests.sh b/tests.sh
index 7a58f99..96d5fe0 100755
--- a/tests.sh
+++ b/tests.sh
@@ -12,6 +12,10 @@ pycodestyle --ignore=W605 dotdrop/
 pycodestyle tests/
 pycodestyle scripts/
 
+# pyflakes tests
+pyflakes dotdrop/
+pyflakes tests/
+
 # retrieve the nosetests binary
 set +e
 nosebin="nosetests"
diff --git a/tests/helpers.py b/tests/helpers.py
index 4a8f195..aadf9b8 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -12,7 +12,7 @@ import tempfile
 
 from dotdrop.options import Options
 from dotdrop.linktypes import LinkTypes
-from dotdrop.utils import *
+from dotdrop.utils import strip_home
 
 TMPSUFFIX = '.dotdrop'
 
diff --git a/tests/test_compare.py b/tests/test_compare.py
index cfed415..567bf92 100644
--- a/tests/test_compare.py
+++ b/tests/test_compare.py
@@ -35,6 +35,7 @@ class TestCompare(unittest.TestCase):
         comp = Comparator()
         results = {}
         for dotfile in dotfiles:
+            path = os.path.expanduser(dotfile.dst)
             ret, insttmp = inst.install_to_temp(t, tmp, dotfile.src,
                                                 dotfile.dst)
             if not ret:
@@ -42,7 +43,6 @@ class TestCompare(unittest.TestCase):
                 continue
             diff = comp.compare(insttmp, dotfile.dst,
                                 ignore=['whatever', 'whatelse'])
-            path = os.path.expanduser(dotfile.dst)
             results[path] = diff == ''
         return results
 
diff --git a/tests/test_config.py b/tests/test_config.py
index 567d091..460d6c7 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -8,11 +8,9 @@ basic unittest for the config parser
 import unittest
 import os
 import yaml
-import tempfile
-import shutil
 
 from dotdrop.config import Cfg
-from tests.helpers import *
+from tests.helpers import get_tempdir, clean, create_fake_config
 
 
 class TestConfig(unittest.TestCase):
@@ -88,7 +86,6 @@ class TestConfig(unittest.TestCase):
         self.assertTrue(conf is not None)
 
         # test profile
-        opts = conf.get_settings()
         profiles = conf.get_profiles()
         self.assertTrue(pf1key in profiles)
         self.assertTrue(pf2key in profiles)
diff --git a/tests/test_import.py b/tests/test_import.py
index fd51769..57b370b 100644
--- a/tests/test_import.py
+++ b/tests/test_import.py
@@ -13,9 +13,12 @@ from dotdrop.dotdrop import cmd_importer
 from dotdrop.dotdrop import cmd_list_profiles
 from dotdrop.dotdrop import cmd_list_files
 from dotdrop.dotdrop import cmd_update
-from dotdrop.config import Cfg
+from dotdrop.linktypes import LinkTypes
 
-from tests.helpers import *
+from tests.helpers import get_path_strip_version, edit_content, \
+                          load_options, create_random_file, \
+                          clean, get_string, get_dotfile_from_yaml, \
+                          get_tempdir, create_fake_config, create_dir
 
 
 class TestImport(unittest.TestCase):
diff --git a/tests/test_listings.py b/tests/test_listings.py
index e9022c9..e07c5a5 100644
--- a/tests/test_listings.py
+++ b/tests/test_listings.py
@@ -7,15 +7,15 @@ basic unittest for the compare function
 
 import unittest
 import os
-import yaml
 
-from dotdrop.config import Cfg
 from dotdrop.dotdrop import cmd_list_profiles
 from dotdrop.dotdrop import cmd_list_files
 from dotdrop.dotdrop import cmd_detail
 from dotdrop.dotdrop import cmd_importer
 
-from tests.helpers import *
+from tests.helpers import create_dir, get_string, get_tempdir, \
+                          create_random_file, load_options, \
+                          create_fake_config, clean
 
 
 class TestListings(unittest.TestCase):