diff --git a/constance/admin.py b/constance/admin.py
index c18ce5f..b66b7bd 100644
--- a/constance/admin.py
+++ b/constance/admin.py
@@ -104,10 +104,10 @@ class ConstanceForm(forms.Form):
         version_hash = hashlib.md5()
 
         for name, options in settings.CONFIG.items():
-            default, help_text = options[0], options[1]
+            default = options[0]
             if len(options) == 3:
                 config_type = options[2]
-                if config_type not in settings.ADDITIONAL_FIELDS and not isinstance(options[0], config_type):
+                if config_type not in settings.ADDITIONAL_FIELDS and not isinstance(default, config_type):
                     raise ImproperlyConfigured(_("Default value type must be "
                                                  "equal to declared config "
                                                  "parameter type. Please fix "
diff --git a/example/cheeseshop/settings.py b/example/cheeseshop/settings.py
index 3091f5f..d591dd2 100644
--- a/example/cheeseshop/settings.py
+++ b/example/cheeseshop/settings.py
@@ -13,7 +13,6 @@ https://docs.djangoproject.com/en/1.8/ref/settings/
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 import os
 from datetime import date
-from decimal import Decimal
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
diff --git a/tests/urls.py b/tests/urls.py
index 1076a94..e04a4e9 100644
--- a/tests/urls.py
+++ b/tests/urls.py
@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from django.conf.urls import url, include
+from django.conf.urls import url
 
 
 urlpatterns = [