diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..92b366f
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,38 @@
+dist: xenial
+sudo: false
+
+language: python
+python:
+- 2.7
+- 3.4
+- 3.5
+- 3.6
+- 3.7
+
+cache: pip
+
+env:
+- DJANGO=1.11
+- DJANGO=2.0
+- DJANGO=2.1
+- DJANGO=master
+
+matrix:
+  fast_finish: true
+  include:
+  - python: 3.7
+    env: TOXENV=flake8
+  exclude:
+  - python: 2.7
+    env: DJANGO=2.0
+  - python: 2.7
+    env: DJANGO=2.1
+  - python: 3.4
+    env: DJANGO=2.1
+  allow_failures:
+  - env: DJANGO=master
+install:
+- travis_retry pip install -U tox-travis
+
+script:
+- tox
diff --git a/flash/base.py b/flash/base.py
index c65d161..5b576e7 100644
--- a/flash/base.py
+++ b/flash/base.py
@@ -1,7 +1,7 @@
-import six
 import time
 import copy
 
+from django.utils import six
 from distutils.version import StrictVersion
 from abc import ABCMeta, abstractmethod, abstractproperty
 from collections import defaultdict
@@ -639,10 +639,10 @@ def get_key(self, *args, **kwargs):
                 value = field_dict[field.attname]
             if isinstance(value, models.Model):
                 # get the pk value on instance
-                if field.rel:
-                    rel_model = field.rel.to
+                if field.remote_field:
+                    rel_model = field.remote_field.model
                 else:
-                    # In very rare cases, field.rel is found to be None
+                    # In very rare cases, field.remote_field is found to be None
                     # that I do not know why.
                     # fallback method to get rel_model
                     rel_model = value.__class__
@@ -869,7 +869,7 @@ def remove_fk_instances(self, instance):
                 delattr(instance, attr)
 
         for field in instance._meta.fields:
-            if field.rel:
+            if field.remote_field:
                 attr = '_%s_cache' % field.name
                 if hasattr(instance, attr):
                     delattr(instance, attr)
@@ -959,7 +959,7 @@ def __new__(cls, *args, **kwargs):
         relation_splits = ncls.relation.split('__')
         relation_str = ''
         for field_name in relation_splits:
-            rel_model = rel_model._meta.get_field(field_name).rel.to
+            rel_model = rel_model._meta.get_field(field_name).remote_field.model
             if relation_str:
                 relation_str += '__%s' % field_name
             else:
@@ -975,7 +975,7 @@ class RelatedModelInvalidationCache(object):
     """ Mixin class used in RelatedInstanceCache, RelatedQuerysetCache
     """
     def _get_invalidation_models(self):
-        return [self.model] + self.rel_models.keys()
+        return [self.model] + list(self.rel_models)
 
     def _get_keys_to_be_invalidated(self, instance, signal, using):
         keys = []
@@ -1173,7 +1173,7 @@ def __new__(cls, *args, **kwargs):
         relation_splits = ncls.relation.split('__')
         relation_str = ''
         for field_name in relation_splits:
-            rel_model = rel_model._meta.get_field(field_name).rel.to
+            rel_model = rel_model._meta.get_field(field_name).remote_field.model
             if relation_str:
                 relation_str += '__%s' % field_name
             else:
@@ -1267,7 +1267,7 @@ def __get__(self, instance, instance_type=None):
                 # If NULL is an allowed value, return it.
                 if self.field.null:
                     return None
-                raise self.field.rel.to.DoesNotExist
+                raise self.field.remote_field.model.DoesNotExist
             rel_obj = self.cache_class.get(val)
             setattr(instance, self.cache_name, rel_obj)
             return rel_obj
@@ -1385,7 +1385,7 @@ def patch_cached_foreignkeys(cls):
         for model, cached_foreignkeys in cls.model_cached_foreignkeys.items():
             for key in cached_foreignkeys:
                 try:
-                    rel_model = model._meta.get_field(key).rel.to
+                    rel_model = model._meta.get_field(key).remote_field.model
                     rel_model_pk_name = rel_model._meta.pk.name
                     cache_class = rel_model.cache.get_cache_class_for(
                         rel_model_pk_name)
@@ -1395,7 +1395,7 @@ def patch_cached_foreignkeys(cls):
                     assert False, ("Cached foreignkey can't be made on field "+
                                    "`%s` of %s. Because %s is not cached on "+
                                    "it's primary key") % (
-                        key, model, model._meta.get_field(key).rel.to)
+                        key, model, model._meta.get_field(key).remote_field.model)
 
 
     @classmethod
diff --git a/flash/collector.py b/flash/collector.py
index 6c2dc04..d3f4a01 100644
--- a/flash/collector.py
+++ b/flash/collector.py
@@ -1,5 +1,4 @@
-import six
-
+from django.utils import six
 from collections import defaultdict
 from functools import wraps
 
diff --git a/flash/tests/__init__.py b/flash/tests/__init__.py
deleted file mode 100644
index 56f12fb..0000000
--- a/flash/tests/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-from .test_flash import *
diff --git a/flash/tests/utils.py b/flash/tests/utils.py
deleted file mode 100644
index 770a226..0000000
--- a/flash/tests/utils.py
+++ /dev/null
@@ -1,33 +0,0 @@
-from django.conf import settings
-from django.core.management import call_command
-from django.db.models import loading
-from django import test
-
-
-class TestCase(test.TestCase):
-    apps = ('flash.tests',)
-    tables_created = False
-
-    def _pre_setup(self):
-        cls = TestCase
-        if not cls.tables_created:
-            # Add the models to the db.
-            cls._original_installed_apps = list(settings.INSTALLED_APPS)
-            for app in cls.apps:
-                if isinstance(settings.INSTALLED_APPS, tuple):
-                    settings.INSTALLED_APPS = list(settings.INSTALLED_APPS)
-                settings.INSTALLED_APPS.append(app)
-            loading.cache.loaded = False
-            call_command('syncdb', interactive=False, verbosity=0)
-            TestCase.tables_created = True
-
-        # Call the original method that does the fixtures etc.
-        super(TestCase, self)._pre_setup()
-
-    def _post_teardown(self):
-        # Call the original method.
-        super(TestCase, self)._post_teardown()
-        cls = TestCase
-        # Restore the settings.
-        settings.INSTALLED_APPS = cls._original_installed_apps
-        loading.cache.loaded = False
diff --git a/runtests.py b/runtests.py
new file mode 100644
index 0000000..77ab310
--- /dev/null
+++ b/runtests.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", 'tests.settings')
+
+
+def runtests():
+    import django
+    from django.conf import settings
+    from django.test.utils import get_runner
+
+    if hasattr(django, 'setup'):
+        django.setup()
+
+    TestRunner = get_runner(settings)
+    test_runner = TestRunner(verbosity=2, interactive=True)
+    failures = test_runner.run_tests(['tests'])
+    sys.exit(bool(failures))
+
+
+if __name__ == "__main__":
+    runtests()
+
diff --git a/setup.py b/setup.py
index 792ebaf..ee49bcb 100644
--- a/setup.py
+++ b/setup.py
@@ -14,4 +14,5 @@
         'flash',
     ],
     zip_safe=False,
+    test_suite='runtests.runtests',
 )
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/flash/tests/caches.py b/tests/caches.py
similarity index 100%
rename from flash/tests/caches.py
rename to tests/caches.py
diff --git a/flash/tests/models.py b/tests/models.py
similarity index 69%
rename from flash/tests/models.py
rename to tests/models.py
index 98a5d01..8c0be6b 100644
--- a/flash/tests/models.py
+++ b/tests/models.py
@@ -9,12 +9,12 @@ class ModelA(models.Model):
 class ModelB(models.Model):
     num = models.IntegerField()
     text = models.CharField(max_length=50)
-    a = models.ForeignKey(ModelA)
+    a = models.ForeignKey(ModelA, on_delete=models.CASCADE)
 
 
 class ModelC(models.Model):
-    a = models.ForeignKey(ModelA)
-    b = models.ForeignKey(ModelB)
+    a = models.ForeignKey(ModelA, on_delete=models.CASCADE)
+    b = models.ForeignKey(ModelB, on_delete=models.CASCADE)
     num = models.IntegerField()
 
 
diff --git a/tests/settings.py b/tests/settings.py
new file mode 100644
index 0000000..49cebd1
--- /dev/null
+++ b/tests/settings.py
@@ -0,0 +1,12 @@
+SECRET_KEY = 's3cr3t'
+INSTALLED_APPS = [
+    'django.contrib.contenttypes',
+    'flash',
+    'tests',
+]
+DATABASES = {
+    'default': {
+        'NAME': 'default',
+        'ENGINE': 'django.db.backends.sqlite3',
+    },
+}
diff --git a/flash/tests/test_flash.py b/tests/test_flash.py
similarity index 98%
rename from flash/tests/test_flash.py
rename to tests/test_flash.py
index e06f03f..f143284 100644
--- a/flash/tests/test_flash.py
+++ b/tests/test_flash.py
@@ -1,8 +1,9 @@
 import time
 
+from django.test import TestCase
+
 from flash.base import cache, BatchCacheQuery
 
-from .utils import TestCase
 from .models import ModelA, ModelB, ModelC, ModelD
 from .caches import BCacheOnNum, AListCacheOnD
 
@@ -166,7 +167,7 @@ def test_basic1(self):
             2: BCacheOnNum(num=2),
         }).get(only_cache=True)
 
-        self.assertTrue(result.keys() == [1])
+        self.assertEqual(list(result), [1])
 
         result = BatchCacheQuery({
             1: ModelA.cache.get_query(num=1),
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..80e2066
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,43 @@
+[tox]
+envlist =
+  py{27,34,35,36}-django111,
+  py{34,35,36,37}-django20,
+  py{35,36,37}-django21,
+  py{35,36,37}-djangomaster,
+  flake8
+
+[travis]
+python =
+  2.7: py27
+  3.4: py34
+  3.5: py35
+  3.6: py36
+  3.7: py37
+
+[travis:env]
+DJANGO =
+  1.11: django111
+  2.0: django20
+  2.1: django21
+  master: djangomaster
+
+[testenv]
+deps =
+  django111: django>=1.11,<2.0
+  django20: django>=2.0,<2.1
+  django21: django>=2.1,<2.2
+  djangomaster: https://github.com/django/django/archive/master.tar.gz
+usedevelop = True
+ignore_outcome =
+  djangomaster: True
+commands =
+  python setup.py test
+setenv =
+  PYTHONDONTWRITEBYTECODE=1
+
+[testenv:flake8]
+deps = flake8
+commands = flake8
+
+[flake8]
+ignore = D203