diff --git a/src/callbacks.py b/src/callbacks.py
index 1de3672..dc35ef9 100644
--- a/src/callbacks.py
+++ b/src/callbacks.py
@@ -11,10 +11,15 @@ def friend_status(a, b, c, d):
 
 
 def friend_message(a, b, c, d, e, f):
-    print 'Message: ', unicode(d, "utf-8")
+    print 'Message: ', str(d)
 
 
-def init_callbacks(tox):
+def init_callbacks(tox, window):
+    """
+    :param tox: tox instance
+    :param window: main window
+    :return: None
+    """
     tox.callback_friend_status(friend_status, 0)
     tox.callback_friend_message(friend_message, 0)
     tox.callback_self_connection_status(self_connection_status, 0)
diff --git a/src/main.py b/src/main.py
index a60bd69..afb705d 100644
--- a/src/main.py
+++ b/src/main.py
@@ -73,7 +73,7 @@ def main():
     # bootstrap
     for data in node_generator():
         tox.bootstrap(*data)
-    init_callbacks(tox)
+    init_callbacks(tox, ms)
     # starting thread for tox iterate
     mainloop = ToxIterateThread(tox)
     mainloop.start()
diff --git a/src/tox.py b/src/tox.py
index a51b6db..da3bb90 100644
--- a/src/tox.py
+++ b/src/tox.py
@@ -24,9 +24,8 @@ class ToxOptions(Structure):
 class LibToxCore(object):
     def __init__(self):
         if system() == 'Linux':
-            temp = os.path.dirname(os.path.abspath(__file__)) + '/libs/'
-            os.chdir(temp)
-            self._libtoxcore = CDLL(temp + 'libtoxcore.so')
+            # be sure that libtoxcore and libsodium are installed in your os
+            self._libtoxcore = CDLL('libtoxcore.so')
         elif system() == 'Windows':
             self._libtoxcore = CDLL('libs/libtox.dll')
         else:
diff --git a/tests/tests.py b/tests/tests.py
index 1e44e1e..8c19bcb 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -2,7 +2,7 @@ from src.settings import Settings
 from src.util import bin_to_string, string_to_bin
 import sys
 from src.bootstrap import node_generator
-from src.profile import Profile
+from src.profile import Profile, tox_factory
 import os
 
 
@@ -55,3 +55,14 @@ class TestNodeGen():
     def test_ports(self):
         for elem in node_generator():
             assert elem[1] in [33445, 443, 5190, 2306, 1813]
+
+
+class TestTox():
+
+    def test_creation(self):
+        data = Profile.open_profile(Settings.get_default_path(), 'tox_save')
+        settings = Settings.get_default_settings()
+        tox = tox_factory(data, settings)
+        for data in node_generator():
+            tox.bootstrap(*data)
+        del tox