diff --git a/wagtail/wagtailcore/tests/test_blocks.py b/wagtail/wagtailcore/tests/test_blocks.py
index 458fbb341b..b038a5d03c 100644
--- a/wagtail/wagtailcore/tests/test_blocks.py
+++ b/wagtail/wagtailcore/tests/test_blocks.py
@@ -743,7 +743,7 @@ class TestStreamBlock(unittest.TestCase):
                 'value': 'My second paragraph',
             },
         ])
-        return block.render_form(value,  prefix='myarticle')
+        return block.render_form(value, prefix='myarticle')
 
     def test_render_form_wrapper_class(self):
         html = self.render_form()
diff --git a/wagtail/wagtaildocs/views/chooser.py b/wagtail/wagtaildocs/views/chooser.py
index 1b8c0ef5bb..7669ffbc88 100644
--- a/wagtail/wagtaildocs/views/chooser.py
+++ b/wagtail/wagtaildocs/views/chooser.py
@@ -94,7 +94,7 @@ def document_chosen(request, document_id):
 
     return render_modal_workflow(
         request, None, 'wagtaildocs/chooser/document_chosen.js',
-        {'document_json':  get_document_json(document)}
+        {'document_json': get_document_json(document)}
     )
 
 
diff --git a/wagtail/wagtailforms/models.py b/wagtail/wagtailforms/models.py
index ff3278167a..be093ebb9d 100644
--- a/wagtail/wagtailforms/models.py
+++ b/wagtail/wagtailforms/models.py
@@ -22,17 +22,17 @@ from .forms import FormBuilder
 
 
 FORM_FIELD_CHOICES = (
-    ('singleline',   _('Single line text')),
-    ('multiline',    _('Multi-line text')),
-    ('email',        _('Email')),
-    ('number',       _('Number')),
-    ('url',          _('URL')),
-    ('checkbox',     _('Checkbox')),
-    ('checkboxes',   _('Checkboxes')),
-    ('dropdown',     _('Drop down')),
-    ('radio',        _('Radio buttons')),
-    ('date',         _('Date')),
-    ('datetime',     _('Date/time')),
+    ('singleline', _('Single line text')),
+    ('multiline', _('Multi-line text')),
+    ('email', _('Email')),
+    ('number', _('Number')),
+    ('url', _('URL')),
+    ('checkbox', _('Checkbox')),
+    ('checkboxes', _('Checkboxes')),
+    ('dropdown', _('Drop down')),
+    ('radio', _('Radio buttons')),
+    ('date', _('Date')),
+    ('datetime', _('Date/time')),
 )