diff --git a/eav/admin.py b/eav/admin.py
index 884d297..ea88fc9 100644
--- a/eav/admin.py
+++ b/eav/admin.py
@@ -1,8 +1,8 @@
 '''Admin. This module contains classes used for admin integration.'''
 
 from django.contrib import admin
-from django.contrib.admin.options import (InlineModelAdmin, ModelAdmin,
-                                          StackedInline)
+from django.contrib.admin.options import InlineModelAdmin
+from django.contrib.admin.options import ModelAdmin
 from django.forms.models import BaseInlineFormSet
 from django.utils.safestring import mark_safe
 
diff --git a/eav/forms.py b/eav/forms.py
index dc1a622..eeb1f9b 100644
--- a/eav/forms.py
+++ b/eav/forms.py
@@ -4,7 +4,7 @@ from copy import deepcopy
 
 from django.contrib.admin.widgets import AdminSplitDateTime
 from django.forms import (BooleanField, CharField, ChoiceField, DateTimeField,
-                          FloatField, IntegerField, ModelForm, ValidationError)
+                          FloatField, IntegerField, ModelForm)
 from django.utils.translation import ugettext_lazy as _
 
 
diff --git a/eav/queryset.py b/eav/queryset.py
index 413a300..254a7bd 100644
--- a/eav/queryset.py
+++ b/eav/queryset.py
@@ -21,8 +21,7 @@ Q-expressions need to be rewritten for two reasons:
        For details see: ``rewrite_q_expr``.
 '''
 
-import sys
-from functools import reduce, wraps
+from functools import wraps
 
 from django.db import models
 from django.db.models import Q
diff --git a/eav/registry.py b/eav/registry.py
index 8b463ac..73a97f8 100644
--- a/eav/registry.py
+++ b/eav/registry.py
@@ -1,8 +1,7 @@
 '''Registry. This modules contains the registry classes.'''
 
 from django.contrib.contenttypes import fields as generic
-from django.db.models.signals import post_init, post_save, pre_init, pre_save
-from django.db.utils import DatabaseError
+from django.db.models.signals import post_init, post_save, pre_save
 
 from .managers import EntityManager
 from .models import Attribute, Entity, Value
diff --git a/eav/validators.py b/eav/validators.py
index 090603f..0456a97 100644
--- a/eav/validators.py
+++ b/eav/validators.py
@@ -16,7 +16,6 @@ import datetime
 
 from django.core.exceptions import ValidationError
 from django.db import models
-from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _
 
 
diff --git a/tests/data_validation.py b/tests/data_validation.py
index f23af11..501a35c 100644
--- a/tests/data_validation.py
+++ b/tests/data_validation.py
@@ -5,10 +5,9 @@ from django.core.exceptions import ValidationError
 from django.contrib.auth.models import User
 
 import eav
-from eav.registry import EavConfig
 from eav.models import Attribute, Value, EnumValue, EnumGroup
 
-from .models import Patient, Encounter
+from .models import Patient
 
 
 class DataValidation(TestCase):
diff --git a/tests/queries.py b/tests/queries.py
index 81c7e65..d811db3 100644
--- a/tests/queries.py
+++ b/tests/queries.py
@@ -1,13 +1,11 @@
-from django.contrib.auth.models import User
 from django.core.exceptions import MultipleObjectsReturned
 from django.db.models import Q
 from django.test import TestCase
 
 import eav
 from eav.models import Attribute, EnumGroup, EnumValue, Value
-from eav.registry import EavConfig
 
-from .models import Encounter, ExampleModel, Patient
+from .models import Encounter, Patient
 
 
 class Queries(TestCase):
diff --git a/tests/registry.py b/tests/registry.py
index 5b8b392..21113f1 100644
--- a/tests/registry.py
+++ b/tests/registry.py
@@ -1,9 +1,7 @@
 from django.test import TestCase
 
 import eav
-from eav.registry import Registry, EavConfig
-from eav.managers import EntityManager
-from eav.models import Attribute
+from eav.registry import EavConfig
 
 from .models import Patient, Encounter, ExampleModel
 
@@ -28,7 +26,7 @@ class RegistryTests(TestCase):
                 return 'testing'
 
         eav.register(Encounter, EncounterEav)
-        
+
     def test_registering_with_defaults(self):
         eav.register(Patient)
         self.assertTrue(hasattr(Patient, '_eav_config_cls'))
diff --git a/tests/set_and_get.py b/tests/set_and_get.py
index 7c21a38..986f4c9 100644
--- a/tests/set_and_get.py
+++ b/tests/set_and_get.py
@@ -1,8 +1,7 @@
 from django.test import TestCase
 
 import eav
-from eav.registry import Registry, EavConfig
-from eav.managers import EntityManager
+from eav.registry import EavConfig
 
 from .models import Patient, Encounter