diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 000000000..3e4d7015c
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,33 @@
+# vim ft=yaml
+# travis-ci.org definition for python-patterns build
+language: python
+
+sudo: false
+
+python:
+  - "2.7"
+  - "3.3"
+  - "3.4"
+  - "3.5"
+# Disabled for now since cause more pain than gain
+#  - "pypy"
+#  - "pypy3"
+
+cache:
+  - pip
+
+install:
+  - travis_retry pip install -q coveralls codecov
+  - pip install flake8  # eventually worth
+
+script:
+  # Run tests
+  - PYTHONPATH=. nosetests -s -v --with-doctest --with-cov --cover-package . --logging-level=INFO -v .
+  # Actually run all the scripts, contributing to coverage
+  - ./run_all.sh
+  # for now failure in flaking is ignored
+  - flake8 *py || echo "PEP8 the code"
+
+after_success:
+  - coveralls
+  - codecov
diff --git a/3-tier.py b/3-tier.py
index 8b52216aa..625870a33 100644
--- a/3-tier.py
+++ b/3-tier.py
@@ -19,8 +19,7 @@ def __get__(self, obj, klas):
 class BusinessLogic(object):
     """ Business logic holding data store instances """
 
-    def __init__(self, data):
-        self.data = data
+    data = Data()
 
     def product_list(self):
         return self.data['products'].keys()
@@ -32,8 +31,8 @@ def product_information(self, product):
 class Ui(object):
     """ UI interaction class """
 
-    def __init__(self, logic):
-        self.business_logic = logic
+    def __init__(self):
+        self.business_logic = BusinessLogic()
 
     def get_product_list(self):
         print('PRODUCT LIST:')
@@ -54,9 +53,7 @@ def get_product_information(self, product):
 
 
 def main():
-    data = Data()
-    logic = BusinessLogic(data)
-    ui = Ui(logic)
+    ui = Ui()
     ui.get_product_list()
     ui.get_product_information('cheese')
     ui.get_product_information('eggs')
@@ -72,7 +69,7 @@ def main():
 # cheese
 # eggs
 # milk
-#
+# 
 # (Fetching from Data Store)
 # PRODUCT INFORMATION:
 # Name: Cheese, Price: 2.00, Quantity: 10
diff --git a/adapter.py b/adapter.py
index 25cbec973..b0bc1f238 100644
--- a/adapter.py
+++ b/adapter.py
@@ -46,8 +46,10 @@ class Adapter(object):
     >>> objects = []
     >>> dog = Dog()
     >>> print(dog.__dict__)
+    {'name': 'Dog'}
     >>> objects.append(Adapter(dog, make_noise=dog.bark))
     >>> print(objects[0].original_dict())
+    {'name': 'Dog'}
     >>> cat = Cat()
     >>> objects.append(Adapter(cat, make_noise=cat.meow))
     >>> human = Human()
diff --git a/chain.py b/chain.py
index 4e087ec66..c037a4552 100644
--- a/chain.py
+++ b/chain.py
@@ -57,7 +57,7 @@ def delegate(self, requests):
 def coroutine(func):
     def start(*args, **kwargs):
         cr = func(*args, **kwargs)
-        cr.next()
+        next(cr)
         return cr
     return start
 
diff --git a/chaining_method.py b/chaining_method.py
index e03747618..de9c115d1 100644
--- a/chaining_method.py
+++ b/chaining_method.py
@@ -1,6 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+from __future__ import print_function
+
 class Person(object):
 
     def __init__(self, name, action):
diff --git a/command.py b/command.py
index 310432cdb..27c255558 100644
--- a/command.py
+++ b/command.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import os
-
+from os.path import lexists
 
 class MoveFileCommand(object):
 
@@ -28,13 +28,23 @@ def main():
     command_stack.append(MoveFileCommand('foo.txt', 'bar.txt'))
     command_stack.append(MoveFileCommand('bar.txt', 'baz.txt'))
 
-    # they can be executed later on
-    for cmd in command_stack:
-        cmd.execute()
-
-    # and can also be undone at will
-    for cmd in reversed(command_stack):
-        cmd.undo()
+    # verify that none of the target files exist
+    assert(not lexists("foo.txt"))
+    assert(not lexists("bar.txt"))
+    assert(not lexists("baz.txt"))
+    try:
+        with open("foo.txt", "w"):  # Creating the file
+            pass
+
+        # they can be executed later on
+        for cmd in command_stack:
+            cmd.execute()
+
+        # and can also be undone at will
+        for cmd in reversed(command_stack):
+            cmd.undo()
+    finally:
+        os.unlink("foo.txt")
 
 if __name__ == "__main__":
     main()
diff --git a/decorator.py b/decorator.py
index c90749875..e0a6fa46c 100644
--- a/decorator.py
+++ b/decorator.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 """https://docs.python.org/2/library/functools.html#functools.wraps"""
 """https://stackoverflow.com/questions/739654/how-can-i-make-a-chain-of-function-decorators-in-python/739665#739665"""
 
diff --git a/delegation_pattern.py b/delegation_pattern.py
old mode 100755
new mode 100644
diff --git a/facade.py b/facade.py
index a92e4d25b..b314b1b3c 100644
--- a/facade.py
+++ b/facade.py
@@ -3,7 +3,7 @@
 
 import time
 
-SLEEP = 0.5
+SLEEP = 0.1
 
 
 # Complex Parts
diff --git a/flyweight.py b/flyweight.py
index 557f12720..0e7d71e81 100644
--- a/flyweight.py
+++ b/flyweight.py
@@ -74,6 +74,11 @@ def __init__(self, *args, **kwargs):
 
 
 if __name__ == '__main__':
+    import sys
+    if sys.version_info[0] > 2:
+        sys.stderr.write("!!! This example is compatible only with Python 2 ATM !!!\n")
+        raise SystemExit(0)
+
     # comment __new__ and uncomment __init__ to see the difference
     c1 = Card('9', 'h')
     c2 = Card('9', 'h')
diff --git a/proxy.py b/proxy.py
index 4934b0bc9..9aea8a8b4 100644
--- a/proxy.py
+++ b/proxy.py
@@ -18,17 +18,17 @@ def talk(self):
         print("Proxy checking for Sales Manager availability")
         if self.busy == 'No':
             self.sales = SalesManager()
-            time.sleep(2)
+            time.sleep(0.1)
             self.sales.talk()
         else:
-            time.sleep(2)
+            time.sleep(0.1)
             print("Sales Manager is busy")
 
 
 class NoTalkProxy(Proxy):
     def talk(self):
         print("Proxy checking for Sales Manager availability")
-        time.sleep(2)
+        time.sleep(0.1)
         print("This Sales Manager will not talk to you whether he/she is busy or not")
 
 
diff --git a/run_all.sh b/run_all.sh
new file mode 100755
index 000000000..1a90150dc
--- /dev/null
+++ b/run_all.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+#
+# Little helper to run all the scripts, under python coverage if coverage is available
+#
+
+set -eu
+failed=""
+
+if which coverage > /dev/null; then
+    COVERAGE="`which coverage` run -a"
+else
+    COVERAGE=''
+fi
+for f in [^_]*py; do
+    python $COVERAGE $f || failed+=" $f"
+    echo "I: done $f. Exit code $?"
+done;
+
+if [ ! -z "$failed" ]; then
+    echo "Failed: $failed";
+    exit 1
+fi
\ No newline at end of file
diff --git a/state.py b/state.py
index 45cc30a3b..ef7bfb560 100644
--- a/state.py
+++ b/state.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 """Implementation of the state pattern"""
 
 # http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/
diff --git a/strategy.py b/strategy.py
index 8c7a9b5a4..b7808ceac 100644
--- a/strategy.py
+++ b/strategy.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 # http://stackoverflow.com/questions/963965/how-is-this-strategy-pattern
 # -written-in-python-the-sample-in-wikipedia
 """
diff --git a/test_abstract_factory.py b/test_abstract_factory.py
index ff228a410..c43b655a0 100644
--- a/test_abstract_factory.py
+++ b/test_abstract_factory.py
@@ -9,7 +9,10 @@
 else:
     import unittest
 
-from unittest.mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
 
 
 class TestPetShop(unittest.TestCase):
diff --git a/test_adapter.py b/test_adapter.py
index 2af0926cf..1961127d0 100644
--- a/test_adapter.py
+++ b/test_adapter.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from adapter import Dog, Cat, Human, Car, Adapter
 import sys
 
diff --git a/test_borg.py b/test_borg.py
index c08fd19d5..97470eaf9 100644
--- a/test_borg.py
+++ b/test_borg.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from borg import Borg, YourBorg
 import sys
 
diff --git a/test_bridge.py b/test_bridge.py
index 4c4b5220d..c4db5e8c8 100644
--- a/test_bridge.py
+++ b/test_bridge.py
@@ -4,12 +4,16 @@
 from bridge import DrawingAPI1, DrawingAPI2, CircleShape
 from sys import version_info
 
-if version_info < (2, 7):
+if version_info < (2, 7):  # pragma: no cover
     import unittest2 as unittest
 else:
     import unittest
 
-from unittest.mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
+
 
 class BridgeTest(unittest.TestCase):
 
diff --git a/test_command.py b/test_command.py
index d3b42f6c1..584b273b5 100644
--- a/test_command.py
+++ b/test_command.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from command import MoveFileCommand
 import os, shutil, subprocess, sys
 
diff --git a/test_flyweight.py b/test_flyweight.py
index 5cb62f143..11017ad58 100644
--- a/test_flyweight.py
+++ b/test_flyweight.py
@@ -4,7 +4,7 @@
 from flyweight import Card
 from sys import version_info
 
-if version_info < (2, 7):
+if version_info < (2, 7):  # pragma: no cover
     import unittest2 as unittest
 else:
     import unittest
diff --git a/test_hsm.py b/test_hsm.py
index be468d8ef..79e38440e 100644
--- a/test_hsm.py
+++ b/test_hsm.py
@@ -1,13 +1,17 @@
+#!/usr/bin/env python
 from hsm import HierachicalStateMachine, UnsupportedMessageType,\
     UnsupportedState, UnsupportedTransition, Active, Standby, Suspect, Failed
 from sys import version_info
 
-if version_info < (2, 7):
+if version_info < (2, 7):  # pragma: no cover
     import unittest2 as unittest
 else:
     import unittest
 
-from unittest.mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
 
 
 class HsmMethodTest(unittest.TestCase):
@@ -74,18 +78,18 @@ def test_given_standby_on_message_fault_trigger_shall_set_suspect(cls):
     def test_given_standby_on_message_diagnostics_failed_shall_raise_exception_and_keep_in_state(cls):
         with cls.assertRaises(UnsupportedTransition) as context:
             cls.hsm.on_message('diagnostics failed')
-            cls.assertEqual(isinstance(cls.hsm._current_state, Standby), True)
+        cls.assertEqual(isinstance(cls.hsm._current_state, Standby), True)
 
     def test_given_standby_on_message_diagnostics_passed_shall_raise_exception_and_keep_in_state(cls):
         with cls.assertRaises(UnsupportedTransition) as context:
             cls.hsm.on_message('diagnostics passed')
-            cls.assertEqual(isinstance(cls.hsm._current_state, Standby), True)
+        cls.assertEqual(isinstance(cls.hsm._current_state, Standby), True)
 
     def test_given_standby_on_message_operator_inservice_shall_raise_exception_and_keep_in_state(cls):
         with cls.assertRaises(UnsupportedTransition) as context:
             cls.hsm.on_message('operator inservice')
-            cls.assertEqual(isinstance(cls.hsm._current_state, Standby), True)
+        cls.assertEqual(isinstance(cls.hsm._current_state, Standby), True)
 
 
 if __name__ == "__main__":
-    unittest.main()
+    unittest.main()
\ No newline at end of file
diff --git a/test_observer.py b/test_observer.py
index 473603bd5..733ee6333 100644
--- a/test_observer.py
+++ b/test_observer.py
@@ -7,11 +7,14 @@
 
 if sys.version_info < (2, 7):
     import unittest2 as unittest
-
 else:
     import unittest
 
-from unittest.mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
+
 
 class TestSubject(unittest.TestCase):
 
diff --git a/test_proxy.py b/test_proxy.py
new file mode 100755
index 000000000..839b4130b
--- /dev/null
+++ b/test_proxy.py
@@ -0,0 +1,109 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from proxy import Proxy, NoTalkProxy
+import sys
+from time import time
+
+if sys.version_info[0] == 2:
+    from StringIO import StringIO
+else:
+    from io import StringIO
+
+if sys.version_info < (2, 7):
+    import unittest2 as unittest
+else:
+    import unittest
+
+
+class ProxyTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        """ Class scope setup. """
+        cls.p = Proxy()
+
+    def setUp(cls):
+        """ Function/test case scope setup. """
+        cls.output = StringIO()
+        cls.saved_stdout = sys.stdout
+        sys.stdout = cls.output
+
+    def tearDown(cls):
+        """ Function/test case scope teardown. """
+        cls.output.close()
+        sys.stdout = cls.saved_stdout
+
+    def test_sales_manager_shall_talk_through_proxy_with_delay(cls):
+        cls.p.busy = 'No'
+        start_time = time()
+        cls.p.talk()
+        end_time = time()
+        execution_time = end_time - start_time
+        print_output = cls.output.getvalue()
+        expected_print_output = 'Proxy checking for Sales Manager availability\n\
+Sales Manager ready to talk\n'
+        cls.assertEqual(print_output, expected_print_output)
+        expected_execution_time = 1
+        cls.assertEqual(int(execution_time*10), expected_execution_time)
+
+    def test_sales_manager_shall_respond_through_proxy_with_delay(cls):
+        cls.p.busy = 'Yes'
+        start_time = time()
+        cls.p.talk()
+        end_time = time()
+        execution_time = end_time - start_time
+        print_output = cls.output.getvalue()
+        expected_print_output = 'Proxy checking for Sales Manager availability\n\
+Sales Manager is busy\n'
+        cls.assertEqual(print_output, expected_print_output)
+        expected_execution_time = 1
+        cls.assertEqual(int(execution_time*10), expected_execution_time)
+
+
+class NoTalkProxyTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        """ Class scope setup. """
+        cls.ntp = NoTalkProxy()
+
+    def setUp(cls):
+        """ Function/test case scope setup. """
+        cls.output = StringIO()
+        cls.saved_stdout = sys.stdout
+        sys.stdout = cls.output
+
+    def tearDown(cls):
+        """ Function/test case scope teardown. """
+        cls.output.close()
+        sys.stdout = cls.saved_stdout
+
+    def test_sales_manager_shall_not_talk_through_proxy_with_delay(cls):
+        cls.ntp.busy = 'No'
+        start_time = time()
+        cls.ntp.talk()
+        end_time = time()
+        execution_time = end_time - start_time
+        print_output = cls.output.getvalue()
+        expected_print_output = 'Proxy checking for Sales Manager availability\n\
+This Sales Manager will not talk to you whether he/she is busy or not\n'
+        cls.assertEqual(print_output, expected_print_output)
+        expected_execution_time = 1
+        cls.assertEqual(int(execution_time*10), expected_execution_time)
+
+    def test_sales_manager_shall_not_respond_through_proxy_with_delay(cls):
+        cls.ntp.busy = 'Yes'
+        start_time = time()
+        cls.ntp.talk()
+        end_time = time()
+        execution_time = end_time - start_time
+        print_output = cls.output.getvalue()
+        expected_print_output = 'Proxy checking for Sales Manager availability\n\
+This Sales Manager will not talk to you whether he/she is busy or not\n'
+        cls.assertEqual(print_output, expected_print_output)
+        expected_execution_time = 1
+        cls.assertEqual(int(execution_time*10), expected_execution_time)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/test_publish_subscribe.py b/test_publish_subscribe.py
index 4d154a157..962a12990 100644
--- a/test_publish_subscribe.py
+++ b/test_publish_subscribe.py
@@ -4,13 +4,16 @@
 from sys import version_info
 from publish_subscribe import Provider, Publisher, Subscriber
 
-if version_info < (2, 7):
+if version_info < (2, 7):  # pragma: no cover
     import unittest2 as unittest
-
 else:
     import unittest
 
-from unittest.mock import patch, call
+try:
+    from unittest.mock import patch, call
+except ImportError:
+    from mock import patch, call
+
 
 class TestProvider(unittest.TestCase):
     """
diff --git a/test_state.py b/test_state.py
index 079602b0e..e96f8fbed 100644
--- a/test_state.py
+++ b/test_state.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from state import Radio
 import sys
 
diff --git a/test_strategy.py b/test_strategy.py
index a5f3ee3ee..22bfe43d7 100644
--- a/test_strategy.py
+++ b/test_strategy.py
@@ -1,14 +1,18 @@
+#!/usr/bin/env python
 """
 Tests for strategy.py
 """
 
-import subprocess, sys
+import os
+import subprocess
+import sys
 
 if sys.version_info < (2, 7):
     import unittest2 as unittest
 else:
     import unittest
 
+
 class StrategyTest(unittest.TestCase):
 
     def test_print_output(self):
@@ -18,12 +22,15 @@ def test_print_output(self):
         line when running 'python strategy.py'.
         """
         output = subprocess.check_output(["python", "strategy.py"])
-        expected_output = 'Strategy Example 0\r\n\
-Strategy Example 1 from execute 1\r\n\
-Strategy Example 2 from execute 2\r\n'
+        expected_output = os.linesep.join([
+            'Strategy Example 0',
+            'Strategy Example 1 from execute 1',
+            'Strategy Example 2 from execute 2',
+            ''
+        ])
         # byte representation required due to EOF returned subprocess
         expected_output_as_bytes = expected_output.encode(encoding='UTF-8')
         self.assertEqual(output, expected_output_as_bytes)
 
 if __name__ == "__main__":
-    unitest.main()
+    unittest.main()