Fix pylint errors

common/lib/capa/capa/tests/helpers.py

@@ -33,7 +33,7 @@ def capa_render_template(template, context):
     return get_template(template).render_unicode(**context)
 
 
-def tst_render_template(template, context):
+def tst_render_template(template, context):  # pylint: disable=unused-argument
     """
     A test version of render to template.  Renders to the repr of the context, completely ignoring
     the template name.  To make the output valid xml, quotes the content, and wraps it in a <div>
@@ -42,9 +42,10 @@ def tst_render_template(template, context):
 
 
 def calledback_url(dispatch='score_update'):
+    """A callback url method to use in tests."""
     return dispatch
 
-xqueue_interface = MagicMock()
+xqueue_interface = MagicMock()  # pylint: disable=invalid-name
 xqueue_interface.send_to_queue.return_value = (0, 'Success!')
 
 
@@ -68,7 +69,12 @@ def test_capa_system(render_template=None):
         seed=0,
         STATIC_URL='/dummy-static/',
         STATUS_CLASS=Status,
-        xqueue={'interface': xqueue_interface, 'construct_callback': calledback_url, 'default_queuename': 'testqueue', 'waittime': 10},
+        xqueue={
+            'interface': xqueue_interface,
+            'construct_callback': calledback_url,
+            'default_queuename': 'testqueue',
+            'waittime': 10
+        },
     )
     return the_system