Fix tests.

Author: abogushov

django_admin_json_editor/admin.py

@@ -1,8 +1,8 @@
 import json
 
 from django import forms
-from django.utils.safestring import mark_safe
 from django.template.loader import render_to_string
+from django.utils.safestring import mark_safe
 
 
 class JSONEditorWidget(forms.Widget):

setup.cfg

@@ -1,3 +1,6 @@
+[aliases]
+test=pytest
+
 [metadata]
 description-file = README.md
 

setup.py

@@ -27,6 +27,7 @@
 
 test_requirements = [
     'pytest',
+    'pytest-django',
     'pytest-runner',
     'pytest-flake8',
     'flake8-isort',