diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index d1ebd1d..9420974 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -71,4 +71,3 @@ This Code of Conduct is adapted from the [Contributor Covenant][homepage], versi
 available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
 
 [homepage]: https://www.contributor-covenant.org
-
diff --git a/LICENSE b/LICENSE
index b49930c..c8b4a8a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -4,10 +4,10 @@ All rights reserved.
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 
-    1. Redistributions of source code must retain the above copyright notice, 
+    1. Redistributions of source code must retain the above copyright notice,
        this list of conditions and the following disclaimer.
-    
-    2. Redistributions in binary form must reproduce the above copyright 
+
+    2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
 
diff --git a/docs/api_widgets.rst b/docs/api_widgets.rst
index f956ca3..94b69a5 100644
--- a/docs/api_widgets.rst
+++ b/docs/api_widgets.rst
@@ -28,7 +28,7 @@ Widgets
 
 .. autoclass:: import_export.widgets.DurationWidget
    :members:
-   
+
 .. autoclass:: import_export.widgets.JSONWidget
    :members:
 
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 7b7568f..012e83c 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -17,7 +17,7 @@ Changelog
 
 - JSONWidget for jsonb fields (#803)
 
-- Add ExportActionMixin (#809) 
+- Add ExportActionMixin (#809)
 
 - Add Import Export Permissioning #608 (#804)
 
@@ -166,7 +166,7 @@ Changelog
 
 - Append rows to Result object via function call to allow overriding (#462)
 
-- Add get_resource_kwargs to allow passing request to resource (#457) 
+- Add get_resource_kwargs to allow passing request to resource (#457)
 
 - Expose Django user to get_export_data() and export() (#447)
 
diff --git a/import_export/mixins.py b/import_export/mixins.py
index 5e44c19..abf3a32 100644
--- a/import_export/mixins.py
+++ b/import_export/mixins.py
@@ -64,7 +64,7 @@ class ExportViewMixin(object):
 
 
 class ExportViewFormMixin(ExportViewMixin, FormView):
-    def form_valid(self, form): 
+    def form_valid(self, form):
         formats = self.get_export_formats()
         file_format = formats[
             int(form.cleaned_data['file_format'])
diff --git a/import_export/widgets.py b/import_export/widgets.py
index 1de4714..99d1351 100644
--- a/import_export/widgets.py
+++ b/import_export/widgets.py
@@ -269,7 +269,7 @@ class SimpleArrayWidget(Widget):
     def render(self, value, obj=None):
         return self.separator.join(six.text_type(v) for v in value)
 
-    
+
 class JSONWidget(Widget):
     """
     Widget for a JSON object (especially required for jsonb fields in PostgreSQL database.)
@@ -310,7 +310,7 @@ class ForeignKeyWidget(Widget):
 
         from import_export import fields, resources
         from import_export.widgets import ForeignKeyWidget
-        
+
         class BookResource(resources.ModelResource):
             author = fields.Field(
                 column_name='author',
diff --git a/tests/core/tests/test_admin_integration.py b/tests/core/tests/test_admin_integration.py
index 403e1b9..4b73640 100644
--- a/tests/core/tests/test_admin_integration.py
+++ b/tests/core/tests/test_admin_integration.py
@@ -64,7 +64,7 @@ class ImportExportAdminIntegrationTest(TestCase):
         response = self.client.post('/admin/core/book/process_import/', data,
                                     follow=True)
         self.assertEqual(response.status_code, 200)
-        self.assertContains(response, 
+        self.assertContains(response,
             _('Import finished, with {} new and {} updated {}.').format(
                 1, 0, Book._meta.verbose_name_plural)
         )
@@ -101,7 +101,7 @@ class ImportExportAdminIntegrationTest(TestCase):
         response = self.client.post('/admin/core/book/process_import/', data,
                                     follow=True)
         self.assertEqual(response.status_code, 200)
-        self.assertContains(response, 
+        self.assertContains(response,
             _('Import finished, with {} new and {} updated {}.').format(
                 1, 0, Book._meta.verbose_name_plural)
         )
diff --git a/tests/database.db b/tests/database.db
index 73a7485..a252d0b 100644
Binary files a/tests/database.db and b/tests/database.db differ