diff --git a/.gitignore b/.gitignore
index 795f9cf9d..5fe57bc66 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,7 +3,8 @@
 ./tests/functional/2nd_feature_dir/step_definitions/__init__.py
 docs/_build/
 docs/_build
-lettuce.egg-info/
+*.egg
+*.egg-info/
 build/
 dist/
 .DS_Store
diff --git a/MANIFEST.in b/MANIFEST.in
index db7fbffad..11bae0fb7 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1,2 @@
 include COPYING *.md
+include requirements.txt
\ No newline at end of file
diff --git a/lettuce/__init__.py b/lettuce/__init__.py
index 7f658ff13..d878c2b8e 100644
--- a/lettuce/__init__.py
+++ b/lettuce/__init__.py
@@ -65,7 +65,7 @@
 try:
     terrain = fs.FileSystem._import("terrain")
     reload(terrain)
-except Exception, e:
+except Exception as e:
     if not "No module named terrain" in str(e):
         string = 'Lettuce has tried to load the conventional environment ' \
             'module "terrain"\nbut it has errors, check its contents and ' \
@@ -129,8 +129,8 @@ def run(self):
         started_at = datetime.now()
         try:
             self.loader.find_and_load_step_definitions()
-        except StepLoadingError, e:
-            print "Error loading step definitions:\n", e
+        except StepLoadingError as e:
+            print("Error loading step definitions:\n", e)
             return
 
         call_hook('before', 'all')
@@ -154,12 +154,12 @@ def run(self):
                 results.append(
                     feature.run(self.scenarios, tags=self.tags, random=self.random))
 
-        except exceptions.LettuceSyntaxError, e:
+        except exceptions.LettuceSyntaxError as e:
             sys.stderr.write(e.msg)
             failed = True
         except:
             e = sys.exc_info()[1]
-            print "Died with %s" % str(e)
+            print("Died with %s" % str(e))
             traceback.print_exc()
             failed = True
 
@@ -178,10 +178,10 @@ def run(self):
             minutes = time_took.seconds / 60
             seconds = time_took.seconds
             if hours:
-                print  "(finished within %d hours)" % hours
+                print ("(finished within %d hours)" % hours)
             elif minutes:
-                print  "(finished within %d minutes)" % minutes
+                print("(finished within %d minutes)" % minutes)
             elif seconds:
-                print  "(finished within %d seconds)" % seconds
+                print("(finished within %d seconds)" % seconds)
 
             return total
diff --git a/lettuce/core.py b/lettuce/core.py
index 90fe91f64..fdca2fe8f 100644
--- a/lettuce/core.py
+++ b/lettuce/core.py
@@ -14,7 +14,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+from __future__ import unicode_literals
 
 import re
 import codecs
@@ -39,16 +39,16 @@
 
 class REP(object):
     "RegEx Pattern"
-    first_of = re.compile(ur'^first_of_')
-    last_of = re.compile(ur'^last_of_')
+    first_of = re.compile(r'^first_of_')
+    last_of = re.compile(r'^last_of_')
     language = re.compile(u"language:[ ]*([^\s]+)")
     within_double_quotes = re.compile(r'("[^"]+")')
     within_single_quotes = re.compile(r"('[^']+')")
     only_whitespace = re.compile('^\s*$')
     tag_extraction_regex = re.compile(r'(?:(?:^|\s+)[@]([^@\s]+))')
-    tag_strip_regex = re.compile(ur'(?:(?:^\s*|\s+)[@]\S+\s*)+$', re.DOTALL)
-    comment_strip1 = re.compile(ur'(^[^\'"]*)[#]([^\'"]*)$')
-    comment_strip2 = re.compile(ur'(^[^\'"]+)[#](.*)$')
+    tag_strip_regex = re.compile(r'(?:(?:^\s*|\s+)[@]\S+\s*)+$', re.DOTALL)
+    comment_strip1 = re.compile(r'(^[^\'"]*)[#]([^\'"]*)$')
+    comment_strip2 = re.compile(r'(^[^\'"]+)[#](.*)$')
 
 
 class HashList(list):
@@ -142,7 +142,7 @@ def __call__(self, *args, **kw):
         try:
             ret = self.function(self.step, *args, **kw)
             self.step.passed = True
-        except Exception, e:
+        except Exception as e:
             self.step.failed = True
             self.step.why = ReasonToFail(self.step, e)
             raise
@@ -456,10 +456,10 @@ def run_all(steps, outline=None, run_callbacks=False, ignore_case=True):
                     step.run(ignore_case)
                     steps_passed.append(step)
 
-            except NoDefinitionFound, e:
+            except NoDefinitionFound as e:
                 steps_undefined.append(e.step)
 
-            except Exception, e:
+            except Exception as e:
                 steps_failed.append(step)
                 reasons_to_fail.append(step.why)
 
@@ -728,7 +728,7 @@ def _add_myself_to_steps(self):
             step.scenario = self
 
     def _find_tags_in(self, original_string):
-        broad_regex = re.compile(ur"([@].*)%s: (%s)" % (
+        broad_regex = re.compile(r"([@].*)%s: (%s)" % (
             self.language.scenario_separator,
             self.name), re.DOTALL)
 
@@ -737,7 +737,7 @@ def _find_tags_in(self, original_string):
             regexes.append(broad_regex)
 
         else:
-            regexes.append(re.compile(ur"(?:%s: %s.*)([@]?.*)%s: (%s)\s*\n" % (
+            regexes.append(re.compile(r"(?:%s: %s.*)([@]?.*)%s: (%s)\s*\n" % (
                 self.language.non_capturable_scenario_separator,
                 self.previous_scenario.name,
                 self.language.scenario_separator,
@@ -885,8 +885,8 @@ def run(self, ignore_case):
             call_hook('before_each', 'step', step)
             try:
                 results.append(step.run(ignore_case))
-            except Exception, e:
-                print e
+            except Exception as e:
+                print(e)
                 pass
 
             call_hook('after_each', 'step', step)
@@ -1089,7 +1089,7 @@ def _parse_remaining_lines(self, lines, original_string, with_file=None):
         # replacing occurrences of Scenario Outline, with just "Scenario"
         scenario_prefix = u'%s:' % self.language.first_of_scenario
         regex = re.compile(
-            ur"%s:[\t\r\f\v]*" % self.language.scenario_separator, re.U | re.I | re.DOTALL)
+            r"%s:[\t\r\f\v]*" % self.language.scenario_separator, re.U | re.I | re.DOTALL)
 
         joined = regex.sub(scenario_prefix, joined)
 
diff --git a/lettuce/decorators.py b/lettuce/decorators.py
index f2f72f836..09a193d9c 100644
--- a/lettuce/decorators.py
+++ b/lettuce/decorators.py
@@ -39,7 +39,7 @@ def step(regex):
     def wrap(func):
         try:
             re.compile(regex)
-        except re.error, e:
+        except re.error as e:
             raise StepLoadingError("Error when trying to compile:\n"
                                    "  regex: %r\n"
                                    "  for function: %s\n"
diff --git a/lettuce/django/management/commands/harvest.py b/lettuce/django/management/commands/harvest.py
index d8c8b6561..a2b1308d5 100644
--- a/lettuce/django/management/commands/harvest.py
+++ b/lettuce/django/management/commands/harvest.py
@@ -107,7 +107,7 @@ def handle(self, *args, **options):
         if run_server:
             try:
                 server.start()
-            except LettuceServerException, e:
+            except LettuceServerException as e:
                 raise SystemExit(e)
 
         os.environ['SERVER_NAME'] = server.address
@@ -138,10 +138,10 @@ def handle(self, *args, **options):
                 results.append(result)
                 if not result or result.steps != result.steps_passed:
                     failed = True
-        except SystemExit, e:
+        except SystemExit as e:
             failed = e.code
 
-        except Exception, e:
+        except Exception as e:
             failed = True
             import traceback
             traceback.print_exc(e)
diff --git a/lettuce/django/server.py b/lettuce/django/server.py
index cd694b64c..1e98870c7 100644
--- a/lettuce/django/server.py
+++ b/lettuce/django/server.py
@@ -227,7 +227,7 @@ def start(self):
             if getattr(settings, 'LETTUCE_SERVE_ADMIN_MEDIA', False):
                 msg += ' (as per settings.LETTUCE_SERVE_ADMIN_MEDIA=True)'
 
-            print "%s..." % msg
+            print("%s..." % msg)
 
         self._actual_server.start()
         self._actual_server.wait()
@@ -242,7 +242,7 @@ def start(self):
                 'python manage.py --no-server' % addrport,
             )
 
-        print "Django's builtin server is running at %s:%d" % addrport
+        print("Django's builtin server is running at %s:%d" % addrport)
 
     def stop(self, fail=False):
         pid = self._actual_server.pid
diff --git a/lettuce/fs.py b/lettuce/fs.py
index 4032d21c6..04f1cbe61 100644
--- a/lettuce/fs.py
+++ b/lettuce/fs.py
@@ -40,7 +40,7 @@ def find_and_load_step_definitions(self):
             to_load = FileSystem.filename(filename, with_extension=False)
             try:
                 module = __import__(to_load)
-            except ValueError, e:
+            except ValueError as e:
                 import traceback
                 err_msg = traceback.format_exc(e)
                 if 'empty module name' in err_msg.lower():
@@ -136,7 +136,7 @@ def mkdir(cls, path):
         """
         try:
             os.makedirs(path)
-        except OSError, e:
+        except OSError as e:
             # ignore if path already exists
             if e.errno not in (17, ):
                 raise e
diff --git a/lettuce/registry.py b/lettuce/registry.py
index 1266a7911..262bf7d6d 100644
--- a/lettuce/registry.py
+++ b/lettuce/registry.py
@@ -86,10 +86,10 @@ def call_hook(situation, kind, *args, **kw):
     for callback in CALLBACK_REGISTRY[kind][situation]:
         try:
             callback(*args, **kw)
-        except Exception, e:
-            print "=" * 1000
+        except Exception as e:
+            print("=" * 1000)
             traceback.print_exc(e)
-            print
+            print()
             raise
 
 
diff --git a/requirements.txt b/requirements.txt
index 09f37f822..ddb916d75 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,13 +4,13 @@ Pygments==1.5
 Sphinx==1.1.3
 coverage==3.5.2
 cssselect==0.7.1
-distribute==0.6.27
+distribute==0.6.31
 docutils==0.9.1
 fuzzywuzzy==0.1
 lxml
 mock==1.0b1
 mox==0.5.3
 nose==1.1.2
-sure==1.0.6
+sure==1.1.7
 tornado==2.3
 tox==1.4.2
diff --git a/setup.py b/setup.py
index a339511ba..9a650a8e1 100755
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 
 def get_packages():
     # setuptools can't do the job :(
-    packages = []
+    packages = ['']
     for root, dirnames, filenames in os.walk('lettuce'):
         if '__init__.py' in filenames:
             packages.append(".".join(os.path.split(root)).strip("."))
@@ -37,6 +37,13 @@ def get_packages():
 if os.name.lower() == 'nt':
     required_modules.append('colorama')
 
+import os
+test_reqs = os.path.join(os.getcwd(), 'requirements.txt')
+tests_require = [
+        line.strip() for line in open(test_reqs).readlines()
+        if not line.startswith("#")
+    ]
+
 setup(
     name='lettuce',
     version='0.2.12',
@@ -46,6 +53,7 @@ def get_packages():
     url='http://lettuce.it',
     packages=get_packages(),
     install_requires=required_modules,
+    tests_require=tests_require,
     entry_points={
         'console_scripts': ['lettuce = lettuce.bin:main'],
         },
diff --git a/tests/functional/test_terrain.py b/tests/functional/test_terrain.py
index 664458dd5..d951b0ead 100644
--- a/tests/functional/test_terrain.py
+++ b/tests/functional/test_terrain.py
@@ -16,17 +16,23 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 import os
 import commands
+import sys
 from os.path import dirname, abspath, join, curdir
 from nose.tools import assert_equals, with_setup
 
 from tests.asserts import prepare_stdout
 
+PY3 = sys.version_info[0] == 3
+
+
 def test_imports_terrain_under_path_that_is_run():
     old_path = abspath(curdir)
 
     os.chdir(join(abspath(dirname(__file__)), 'simple_features', '1st_feature_dir'))
 
-    status, output = commands.getstatusoutput('python -c "from lettuce import world;assert hasattr(world, \'works_fine\'); print \'it passed!\'"')
+
+    py_command = 'python3' if PY3 else 'python2'
+    status, output = commands.getstatusoutput('{} -c "from lettuce import world;assert hasattr(world, \'works_fine\'); print \'it passed!\'"'.format(py_command))
 
     assert_equals(status, 0)
     assert_equals(output, "it passed!")
diff --git a/tests/unit/test_feature_parser.py b/tests/unit/test_feature_parser.py
index aeb1daf62..7420d32bc 100644
--- a/tests/unit/test_feature_parser.py
+++ b/tests/unit/test_feature_parser.py
@@ -14,7 +14,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-from sure import that, expect
+from sure import expect
 from lettuce import step
 from lettuce.core import Scenario
 from lettuce.core import Feature
@@ -559,7 +559,7 @@ def test_single_scenario_single_scenario():
 
     first_scenario = feature.scenarios[0]
 
-    assert that(first_scenario.tags).deep_equals([
+    expect(first_scenario.tags).should.equal([
         'many', 'other', 'basic', 'tags', 'here', ':)'])
 
 
@@ -580,21 +580,21 @@ def inspected_within_object(step):
 
     @step(r'fill my email with [\'"]?([^\'"]+)[\'"]?')
     def fill_email(step, email):
-        assert that(email).equals('gabriel@lettuce.it')
+        assert expect(email).equals('gabriel@lettuce.it')
 
     feature = Feature.from_string(FEATURE13)
 
     first_scenario = feature.scenarios[0]
-    assert that(first_scenario.tags).equals(['runme'])
+    assert expect(first_scenario.tags).equals(['runme'])
 
     second_scenario = feature.scenarios[1]
-    assert that(second_scenario.tags).equals([])
+    assert expect(second_scenario.tags).equals([])
 
     third_scenario = feature.scenarios[2]
-    assert that(third_scenario.tags).equals(['slow'])
+    assert expect(third_scenario.tags).equals(['slow'])
 
     last_scenario = feature.scenarios[3]
-    assert that(last_scenario.tags).equals([])
+    assert expect(last_scenario.tags).equals([])
 
     result = feature.run()
     print
diff --git a/tox.ini b/tox.ini
index e6be1d84c..20268d6f3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,9 +4,9 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py26, py27
+envlist = py26, py27, py33
 
 [testenv]
 commands =
-    pip install --use-mirrors -q -r requirements.txt
+    python setup.py test
     make unit functional