diff --git a/.ackrc b/.ackrc
new file mode 100644
index 0000000..1617d11
--- /dev/null
+++ b/.ackrc
@@ -0,0 +1 @@
+--ignore-directory=is:build
diff --git a/.gitignore b/.gitignore
index 0dfdfda..114bd34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,5 @@ build/
 dist/
 *~
 *.pyc
-tests/paper_test
 papers.egg-info
 .DS_Store
diff --git a/papers/commands/add_cmd.py b/papers/commands/add_cmd.py
index 57f4399..31cbcf5 100644
--- a/papers/commands/add_cmd.py
+++ b/papers/commands/add_cmd.py
@@ -39,7 +39,7 @@ def command(args):
         bibstr = ''
         while cont:
             try:
-                bibstr = files.editor_input(config, bibstr, suffix='.yaml')
+                bibstr = files.editor_input(config().edit_cmd, bibstr, suffix='.yaml')
                 key, bib = get_bibentry_from_string(bibstr)
                 cont = False
             except Exception:
@@ -47,7 +47,7 @@ def command(args):
                     question='Invalid bibfile. Edit again ?',
                     default='y')
                 if not cont:
-                    ui.exit()
+                    ui.exit(0)
         p = Paper(bibentry=bib, citekey=key)
     else:
         p = Paper.load(bibfile)
diff --git a/papers/commands/edit_cmd.py b/papers/commands/edit_cmd.py
index c2f8bc6..513ea4e 100644
--- a/papers/commands/edit_cmd.py
+++ b/papers/commands/edit_cmd.py
@@ -16,18 +16,18 @@ def parser(subparsers):
 
 def command(args):
 
-    ui = args.ui
-    meta = args.meta
+    ui        = args.ui
+    meta      = args.meta
     reference = args.reference
 
     rp = repo.Repository(config())
     key = parse_reference(ui, rp, reference)
     paper = rp.get_paper(key)
-    filepath = rp._bibfile(key)
-    if meta:
-        filepath = rp._metafile(key)
+    filepath = rp._metafile(key) if meta else rp._bibfile(key)
+
     with open(filepath) as f:
         content = f.read()
+
     while True:
         # Get new content from user
         content = editor_input(config().edit_cmd, content)
@@ -46,10 +46,10 @@ def command(args):
         except repo.CiteKeyCollision:
             options = ['overwrite', 'edit again', 'abort']
             choice = options[ui.input_choice(
-                        options,
-                        ['o', 'e', 'a'],
+                        options, ['o', 'e', 'a'],
                         question='A paper already exist with this citekey.'
                         )]
+
             if choice == 'abort':
                 break
             elif choice == 'overwrite':
diff --git a/papers/commands/import_cmd.py b/papers/commands/import_cmd.py
index ce13f2c..cb81fb9 100644
--- a/papers/commands/import_cmd.py
+++ b/papers/commands/import_cmd.py
@@ -22,7 +22,7 @@ def command(args):
 
     ui = args.ui
     bibpath = args.bibpath
-    copy = agrs.copy
+    copy = args.copy
 
     if copy is None:
         copy = config().import_copy
diff --git a/papers/configs.py b/papers/configs.py
index 391b1b0..25b80e4 100644
--- a/papers/configs.py
+++ b/papers/configs.py
@@ -15,17 +15,18 @@ DFT_PLUGINS = ''
 
 DFT_CONFIG = {'papers_dir'  : os.path.expanduser('~/.papers'),
               'doc_dir'     : 'doc',
-              'import_copy' : 'yes',
-              'import_move' : 'no',
-              'color'       : 'yes',
+              'import_copy' : True,
+              'import_move' : False,
+              'color'       : True,
               'version'     : 3,
+              'version_warning' : True,
 
               'open_cmd'    : 'open',
               'edit_cmd'    : DFT_EDIT_CMD,
               'plugins'     : DFT_PLUGINS
              }
 
-BOOLEANS = {'import_copy', 'import_move', 'color'}
+BOOLEANS = {'import_copy', 'import_move', 'color', 'version_warning'}
 
 
 # package-shared config that can be accessed using :
diff --git a/papers/paper.py b/papers/paper.py
index a5885db..d1018f3 100644
--- a/papers/paper.py
+++ b/papers/paper.py
@@ -271,7 +271,10 @@ class Paper(object):
         self.tags.discard(tag)
 
 
-class PaperInRepo(Paper): # TODO document why this class exists (fabien, 2013/06)
+class PaperInRepo(Paper):
+    """Extend paper class with command specific to the case where the paper
+    lives in a repository.
+    """
 
     def __init__(self, repo, *args, **kwargs):
         Paper.__init__(self, *args, **kwargs)
diff --git a/papers/papers_cmd.py b/papers/papers_cmd.py
index 5118bfb..cd1e138 100644
--- a/papers/papers_cmd.py
+++ b/papers/papers_cmd.py
@@ -9,6 +9,7 @@ from .ui import UI
 from . import configs
 from . import commands
 from . import plugins
+from .__init__ import __version__
 
 cmds = collections.OrderedDict([
         ('init',        commands.init_cmd),
@@ -25,6 +26,26 @@ cmds = collections.OrderedDict([
         ('update',      commands.update_cmd),
         ])
 
+def _update_check(config, ui):
+    if config.version_warning:
+        code_version = int(__version__)
+        repo_version = int(config.version)
+
+        if repo_version > code_version:
+            ui.print_('warning: your repository was generated with an newer version'
+                      ' of papers (v{}) than the one you are using (v{}).\n'.format(
+                       repo_version, code_version) +
+                      '         you should not use papers until you install the '
+                      'newest version. (use version_warning in you papersrc '
+                      'to bypass this error)')
+            sys.exit()
+        elif repo_version < code_version:
+            ui.print_(
+                'warning: your repository version (v{})'.format(repo_version)
+                + 'must be updated to version {}.\n'.format(code_version)
+                + "run 'papers update'.")
+            sys.exit()
+
 
 def execute(raw_args = sys.argv):
     # loading config
@@ -34,6 +55,8 @@ def execute(raw_args = sys.argv):
 
     ui = UI(config)
 
+    _update_check(config, ui)
+
     # Extend with plugin commands
     plugins.load_plugins(ui, config.plugins.split())
     for p in plugins.get_plugins().values():
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 0000000..77eb33e
--- /dev/null
+++ b/tests/.gitignore
@@ -0,0 +1,2 @@
+tmpdir*
+*.bak
diff --git a/tests/fixtures.py b/tests/fixtures.py
index 86bc7b6..3098283 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -16,3 +16,34 @@ doe2013.bibentry.fields['title'] = u'Nice title.'
 doe2013.bibentry.fields['year'] = u'2013'
 doe2013.bibentry.persons['author'] = [Person(u'John Doe')]
 doe2013.citekey = doe2013.generate_citekey()
+
+
+pagerankbib = """
+@techreport{Page99,
+     number = {1999-66},
+      month = {November},
+     author = {Lawrence Page and Sergey Brin and Rajeev Motwani and Terry Winograd},
+       note = {Previous number = SIDL-WP-1999-0120},
+      title = {The PageRank Citation Ranking: Bringing Order to the Web.},
+       type = {Technical Report},
+  publisher = {Stanford InfoLab},
+       year = {1999},
+institution = {Stanford InfoLab},
+        url = {http://ilpubs.stanford.edu:8090/422/},
+}
+"""
+
+pagerankbib_generated = """@techreport{
+    Page99,
+    author = "Page, Lawrence and Brin, Sergey and Motwani, Rajeev and Winograd, Terry",
+    publisher = "Stanford InfoLab",
+    title = "The PageRank Citation Ranking: Bringing Order to the Web.",
+    url = "http://ilpubs.stanford.edu:8090/422/",
+    number = "1999-66",
+    month = "November",
+    note = "Previous number = SIDL-WP-1999-0120",
+    year = "1999",
+    institution = "Stanford InfoLab"
+}
+
+"""
\ No newline at end of file
diff --git a/tests/test.sh b/tests/test.sh
index 7bfba55..c9e2521 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-rm -Rf paper_test/*;
-papers init -p paper_test/;
+rm -Rf tmpdir/*;
+papers init -p tmpdir/;
 papers add -d data/pagerank.pdf -b data/pagerank.bib;
 papers list;
 papers tag;
@@ -8,4 +8,4 @@ papers tag Page99 network+search;
 papers tag Page99;
 papers tag search;
 papers tag 0;
-rm -Rf paper_test/*;
+#rm -Rf tmpdir/*;
diff --git a/tests/test_usecase.py b/tests/test_usecase.py
index c7db347..2a348ee 100644
--- a/tests/test_usecase.py
+++ b/tests/test_usecase.py
@@ -1,6 +1,7 @@
 import sys, os, shutil, glob
 import unittest
 import pkgutil
+import re
 
 import testenv
 import fake_filesystem
@@ -8,9 +9,11 @@ import fake_filesystem_shutil
 import fake_filesystem_glob
 
 from papers import papers_cmd
-from papers import color
+from papers import color, files
 from papers.p3 import io, input
 
+import fixtures
+
 
     # code for fake fs
 
@@ -28,7 +31,9 @@ def _mod_list():
                                         path=papers.__path__,
                                         prefix=papers.__name__+'.',
                                         onerror=lambda x: None):
-        ml.append(__import__(modname, fromlist = 'dummy'))
+        # HACK to not load textnote
+        if not modname.startswith('papers.plugs.texnote'):
+            ml.append((modname, __import__(modname, fromlist = 'dummy')))
     return ml
 
 mod_list = _mod_list()
@@ -43,28 +48,37 @@ def _create_fake_fs():
     fake_glob = fake_filesystem_glob.FakeGlobModule(fake_fs)
 
     fake_fs.CreateDirectory(fake_os.path.expanduser('~'))
-    __builtins__['open'] = fake_open
-    __builtins__['file'] = fake_open
+
+    try:
+        __builtins__.open = fake_open
+        __builtins__.file = fake_open
+    except AttributeError:
+        __builtins__['open'] = fake_open
+        __builtins__['file'] = fake_open
 
     sys.modules['os']     = fake_os
     sys.modules['shutil'] = fake_shutil
     sys.modules['glob']   = fake_glob
 
-    for md in mod_list:
+    for mdname, md in mod_list:
         md.os = fake_os
         md.shutil = fake_shutil
+        md.open = fake_open
+        md.file = fake_open
 
     return fake_fs
 
 def _copy_data(fs):
     """Copy all the data directory into the fake fs"""
-    for filename in real_os.listdir('data/'):
-        filepath = 'data/' + filename
-        if real_os.path.isfile(filepath):
-            with real_open(filepath, 'r') as f:
-                fs.CreateFile(filepath, contents = f.read())
-        if real_os.path.isdir(filepath):
-            fs.CreateDirectory(filepath)
+    datadir = real_os.path.join(real_os.path.dirname(__file__), 'data')
+    for filename in real_os.listdir(datadir):
+        real_path = real_os.path.join(datadir, filename)
+        fake_path = fake_os.path.join('data', filename)
+        if real_os.path.isfile(real_path):
+            with real_open(real_path, 'r') as f:
+                fs.CreateFile(fake_path, contents = f.read())
+        if real_os.path.isdir(real_path):
+            fs.CreateDirectory(fake_path)
 
 
     # redirecting output
@@ -104,13 +118,16 @@ class FakeInput():
         self._cursor = 0
 
     def as_global(self):
-        for md in mod_list:
+        for mdname, md in mod_list:
             md.input = self
+            md.editor_input = self
+            # if mdname.endswith('files'):
+            #     md.editor_input = self
 
     def add_input(self, inp):
         self.inputs.append(inp)
 
-    def __call__(self):
+    def __call__(self, *args, **kwargs):
         inp = self.inputs[self._cursor]
         self._cursor += 1
         return inp
@@ -118,7 +135,7 @@ class FakeInput():
 
     # putting it all together
 
-def _execute_cmds(cmds, fs = None):
+def _execute_cmds(cmds, test_instance = None, fs = None):
     """ Execute a list of commands, and capture their output
 
     A command can be a string, or a tuple of size 2 or 3.
@@ -133,24 +150,26 @@ def _execute_cmds(cmds, fs = None):
         fs = _create_fake_fs()
         _copy_data(fs)
 
+
     outs = []
     for cmd in cmds:
-        if hasattr('__iter__', cmd):
+        if hasattr(cmd, '__iter__'):
             if len(cmd) == 2:
-                input = FakeInput(cmd[2])
+                input = FakeInput(cmd[1])
                 input.as_global()
 
             _, stdout, stderr = redirect(papers_cmd.execute)(cmd[0].split())
             if len(cmd) == 3:
                 actual_out  = color.undye(stdout.getvalue())
                 correct_out = color.undye(cmd[2])
-                self.assertEqual(actual_out, correct_out)
+                if test_instance is not None:
+                    test_instance.assertEqual(actual_out, correct_out)
 
         else:
             assert type(cmd) == str
             _, stdout, stderr = redirect(papers_cmd.execute)(cmd.split())
 
-        print stderr
+        assert(stderr.getvalue() == '')
         outs.append(color.undye(stdout.getvalue()))
 
     return outs
@@ -208,7 +227,7 @@ class TestInput(unittest.TestCase):
         with self.assertRaises(IndexError):
             input()
 
-    def test_input(self):
+    def test_input2(self):
         other_input = FakeInput(['yes', 'no'])
         other_input.as_global()
         self.assertEqual(color.input(), 'yes')
@@ -216,6 +235,14 @@ class TestInput(unittest.TestCase):
         with self.assertRaises(IndexError):
             color.input()
 
+    def test_editor_input(self):
+        other_input = FakeInput(['yes', 'no'])
+        other_input.as_global()
+        self.assertEqual(files.editor_input(), 'yes')
+        self.assertEqual(files.editor_input(), 'no')
+        with self.assertRaises(IndexError):
+            color.input()
+
 
 class TestUsecase(unittest.TestCase):
 
@@ -264,10 +291,94 @@ class TestUsecase(unittest.TestCase):
                 'papers add -b data/10.1371%2Fjournal.pone.0038236.bib',
                 'papers list',
                 'papers attach Page99 data/pagerank.pdf',
-                'papers remove -f Page99',
+                ('papers remove Page99', ['y']),
                 'papers remove -f turing1950computing',
                ]
 
         _execute_cmds(cmds)
 
+    def test_editor_abort(self):
+
+        with self.assertRaises(SystemExit):
+            cmds = ['papers init',
+                    ('papers add', ['abc', 'n']),
+                    ('papers add', ['abc', 'y', 'abc', 'n']),
+                    'papers add -b data/pagerank.bib',
+                    ('papers edit Page99', ['', 'a']),
+                   ]
+
+            _execute_cmds(cmds)
+
+    def test_editor_success(self):
+        cmds = ['papers init',
+                ('papers add', [fixtures.pagerankbib]),
+                ('papers remove Page99', ['y']),
+               ]
+
+        _execute_cmds(cmds)
+
+    def test_edit(self):
+        bib = fixtures.pagerankbib
+        bib1 = re.sub('year = \{1999\}', 'year = {2007}', bib)
+        bib2 = re.sub('Lawrence Page', 'Lawrence Ridge', bib1)
+        bib3 = re.sub('Page99', 'Ridge07', bib2)
+
+        line = '0: [Page99] L. Page et al. "The PageRank Citation Ranking Bringing Order to the Web"  (1999) \n'
+        line1 = re.sub('1999', '2007', line)
+        line2 = re.sub('L. Page', 'L. Ridge', line1)
+        line3 = re.sub('Page99', 'Ridge07', line2)
+
+        cmds = ['papers init',
+                'papers add -b data/pagerank.bib',
+                ('papers list', [], line),
+                ('papers edit Page99', [bib1]),
+                ('papers list', [], line1),
+                ('papers edit Page99', [bib2]),
+                ('papers list', [], line2),
+                ('papers edit Page99', [bib3]),
+                ('papers list', [], line3),
+               ]
+
+        _execute_cmds(cmds, test_instance = self)
+
+    def test_export(self):
+        cmds = ['papers init',
+                ('papers add', [fixtures.pagerankbib]),
+                'papers export Page99',
+                ('papers export Page99 -f bibtex', [], fixtures.pagerankbib_generated),
+                'papers export Page99 -f bibyaml',
+               ]
+
+        _execute_cmds(cmds)
+
+    def test_import(self):
+        cmds = ['papers init',
+                'papers import data/',
+                'papers list'
+               ]
+
+        outs = _execute_cmds(cmds)
+        self.assertEqual(4+1, len(outs[-1].split('\n')))
+
+    def test_open(self):
+        cmds = ['papers init',
+                'papers add -b data/pagerank.bib',
+                'papers open Page99'
+               ]
+
+        with self.assertRaises(SystemExit):
+            _execute_cmds(cmds)
+
+        with self.assertRaises(SystemExit):
+            cmds[-1] == 'papers open Page8'
+            _execute_cmds(cmds)
+
+    def test_update(self):
+        cmds = ['papers init',
+                'papers add -b data/pagerank.bib',
+                'papers update'
+               ]
+
+        with self.assertRaises(SystemExit):
+            _execute_cmds(cmds)