diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..38fb229
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,28 @@
+# .coveragerc to control coverage.py
+[run]
+# branch = True
+concurrency = multiprocessing
+omit = /usr/lib/python3/*,tests/*
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+
+    # Don't complain about missing debug-only code:
+    def __repr__
+    if self\.debug
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+
+    # Don't complain if non-runnable code isn't run:
+    if 0:
+    if __name__ == .__main__.:
+
+omit = /usr/lib/python3/*,tests/*
+
+[html]
+directory = docs/coverage
diff --git a/pymanager/password.py b/pymanager/password.py
index fad084d..0c80b4b 100755
--- a/pymanager/password.py
+++ b/pymanager/password.py
@@ -1,7 +1,7 @@
 #!/usr/bin/python3
 # -*- coding: utf-8 -*-
 #
-# scriptto manipulate password file
+# script to manipulate password file
 #
 #    Copyright (C) 2017  AleaJactaEst
 #
diff --git a/tests/test_manager.py b/tests/test_manager.py
index 21b54b8..4a8ec91 100644
--- a/tests/test_manager.py
+++ b/tests/test_manager.py
@@ -25,6 +25,7 @@ import multiprocessing
 import time
 import re
 import queue
+from unittest.mock import patch
 
 try:
     import pymanager.manager as Manager
@@ -57,40 +58,6 @@ class TestManager(unittest.TestCase):
         self.program = os.path.join(self.path, 'simulate_program.py')
         self.badprogram = os.path.join(self.path, 'test.cfg')
 
-    def testMain(self):
-        logfile = tempfile.NamedTemporaryFile(suffix=".log")
-        workdir_cert_root = tempfile.mkdtemp(prefix='pymanager-certificate-root-')
-        workdir_cert_appli = tempfile.mkdtemp(prefix='pymanager-certificate-application-')
-
-#        cert.root(logfile,
-#                  'DEBUG',
-#                  False,
-#                  workdir_cert_root,
-#                  workdir_cert_appli,
-#                  self.openssl,
-#                  self.size_root,
-#                  self.size_appli,
-#                  self.size_child,
-#                  self.passroot,
-#                  self.passappli,
-#                  self.country_name,
-#                  self.state_or_province_name,
-#                  self.locality_name,
-#                  self.organization_name,
-#                  self.common_name)
-#
-#        conf = tempfile.NamedTemporaryFile(suffix="test.cfg")
-#        conf.write(bytes(
-#'[config]\n'
-#'port = 8000\n'
-#'keyfile = %s/private/serverkey.pem\n'
-#'certfile = %s/private/servercert.pem\n'
-#'ca_cert = %s/certs/cachaincert.pem\n'
-#'address =\n' %(workdir_cert_appli, workdir_cert_appli, workdir_cert_appli ), 'UTF-8'))
-#        args=['--conf', conf]
-#        #manager.main(args)
-        self.assertTrue(True)
-
     def test_load_config(self):
         config = configparser.ConfigParser()
         config.add_section('config:server')
@@ -417,6 +384,29 @@ class TestManager(unittest.TestCase):
                                       event=event)
         manageCommand.run()
 
+    def test_root_bad_loglevel(self):
+        with self.assertRaises(ValueError):
+            Manager.root(None,
+                      None,
+                      'NOTEXIST',
+                      False,
+                      False)
+
+    def test_root_bad_configfile(self):
+        logfile = tempfile.NamedTemporaryFile(suffix="password.cfg", mode='w+t')
+        with self.assertRaises(ValueError):
+            Manager.root(None,
+                      logfile,
+                      'DEBUG',
+                      True,
+                      True)
+
+    def test_main(self):
+        config = tempfile.NamedTemporaryFile(suffix="password.cfg", mode='w+t')
+        config.write('[config:server]\nauthentification=no\n')
+        config.flush()
+        Manager.main(['--conf=' + config.name])
+
 #    def test_run_manager_command(self):
 #        # Doesn't work (we need enable --concurrency=multiprocessing on coverage command but we need coverage 4.0)
 #        logsize = 10
@@ -434,7 +424,6 @@ class TestManager(unittest.TestCase):
 #                                              queueOut,
 #                                              event))
 #        threadCommand.start()
-#
 #        event.set()
 #        queueIn.put("START")
 #        item = queueOut.get(timeout=4)
@@ -452,9 +441,43 @@ class TestManager(unittest.TestCase):
 #            item = queueOut.get(timeout=4)
 #        print("-" * 80,  "wait thread" )
 #        threadCommand.join()
-#
 #        self.assertTrue(True)
-
+#
+#    def test_run_manager_command_2(self):
+#        manage = Manager.Manager(True)
+#        logsize = 10
+#        bufsize = 10
+#        queueIn = multiprocessing.Queue()
+#        queueOut = multiprocessing.Queue()
+#        event = multiprocessing.Event()
+#        manage.runCommand('test_run_manager_command',
+#                           self.program,
+#                           self.path,
+#                           logsize,
+#                           bufsize,
+#                           queueIn,
+#                           queueOut,
+#                           event)
+#        event.set()
+#        queueIn.put("START")
+#        item = queueOut.get(timeout=4)
+#        self.assertEqual(item, "started", 'Error impossible to start program')
+#        time.sleep(1)
+#        event.set()
+#        queueIn.put("STATUS")
+#        item = queueOut.get(timeout=4)
+#        self.assertEqual(item, "started", 'Error impossible to start program')
+#        time.sleep(1)
+#        print("-" * 80,  "shutdown" )
+#        event.set()
+#        queueIn.put("SHUTDOWN")
+#        with self.assertRaises(queue.Empty):
+#            item = queueOut.get(timeout=4)
+#        print("-" * 80,  "wait thread" )
+#        #threadCommand.join()
+#        manage.receive_signal(15, 1)
+#        manage.wait_children_commands()
+#        self.assertTrue(True)
 
 if __name__ == '__main__':
     unittest.main()