Added tox file.

tests/models.py

@@ -50,7 +50,7 @@ def __str__(self):
 
 
 class HousePet(Pet):
-    trained = models.BooleanField()
+    trained = models.BooleanField(default=False)
 
 
 # Test direct-tagging with custom through model
@@ -84,7 +84,7 @@ def __str__(self):
 
 
 class DirectHousePet(DirectPet):
-    trained = models.BooleanField()
+    trained = models.BooleanField(default=False)
 
 
 # Test custom through model to model with custom PK
@@ -114,7 +114,7 @@ def __str__(self):
         return self.name
 
 class CustomPKHousePet(CustomPKPet):
-    trained = models.BooleanField()
+    trained = models.BooleanField(default=False)
 
 # Test custom through model to a custom tag model
 
@@ -143,7 +143,7 @@ def __str__(self):
         return self.name
 
 class OfficialHousePet(OfficialPet):
-    trained = models.BooleanField()
+    trained = models.BooleanField(default=False)
 
 
 class Media(models.Model):

tox.ini

@@ -0,0 +1,95 @@
+[testenv]
+skipsdist = True
+usedevelop = True
+deps =
+	flake8
+deps14 =
+	https://github.com/django/django/archive/stable/1.4.x.zip#egg=django
+deps15 =
+	https://github.com/django/django/archive/stable/1.5.x.zip#egg=django
+deps16 =
+	https://github.com/django/django/archive/stable/1.6.x.zip#egg=django
+deps17 =
+	https://github.com/django/django/archive/master.zip#egg=django
+
+commands =
+	python ./runtests.py
+
+
+[testenv:py26-1.4.x]
+basepython = python2.6
+deps =
+	{[testenv]deps}
+	{[testenv]deps14}
+
+[testenv:py26-1.5.x]
+basepython = python2.6
+deps =
+	{[testenv]deps}
+	{[testenv]deps15}
+
+[testenv:py26-1.6.x]
+basepython = python2.6
+deps =
+	{[testenv]deps}
+	{[testenv]deps16}
+
+[testenv:py27-1.4.x]
+basepython = python2.7
+deps =
+	{[testenv]deps}
+	{[testenv]deps14}
+
+[testenv:py27-1.5.x]
+basepython = python2.7
+deps =
+	{[testenv]deps}
+	{[testenv]deps15}
+
+[testenv:py27-1.6.x]
+basepython = python2.7
+deps =
+	{[testenv]deps}
+	{[testenv]deps16}
+
+[testenv:py27-1.7.x]
+basepython = python2.7
+deps =
+	{[testenv]deps}
+	{[testenv]deps17}
+
+[testenv:py32-1.5.x]
+basepython = python3.2
+deps =
+	{[testenv]deps}
+	{[testenv]deps15}
+
+[testenv:py32-1.6.x]
+basepython = python3.2
+deps =
+	{[testenv]deps}
+	{[testenv]deps16}
+
+[testenv:py32-1.7.x]
+basepython = python3.2
+deps =
+	{[testenv]deps}
+	{[testenv]deps17}
+
+[testenv:py33-1.5.x]
+basepython = python3.3
+deps =
+	{[testenv]deps}
+	{[testenv]deps15}
+
+[testenv:py33-1.6.x]
+basepython = python3.3
+deps =
+	{[testenv]deps}
+	{[testenv]deps16}
+
+[testenv:py33-1.7.x]
+basepython = python3.3
+deps =
+	{[testenv]deps}
+	{[testenv]deps17}