diff --git a/app/email.py b/app/email.py
index e41b0f64008218f8d98c365d6f20c35e1232521a..1e3fb3abc49e28784e2673937bfd1a27b415a6c9 100644
--- a/app/email.py
+++ b/app/email.py
@@ -10,11 +10,14 @@ def send_async_email(app, msg):
 
 
 def send_email(to, subject, template, **kwargs):
-    app = current_app._get_current_object()
-    msg = Message(app.config['OPAQUE_MAIL_SUBJECT_PREFIX'] + ' ' + subject,
-                  sender=app.config['OPAQUE_MAIL_SENDER'], recipients=[to])
+    subject = '{} {}'.format(current_app.config['OPAQUE_MAIL_SUBJECT_PREFIX'],
+                             subject)
+    msg = Message(subject,
+                  sender=current_app.config['OPAQUE_MAIL_SENDER'],
+                  recipients=[to])
     msg.body = render_template(template + '.txt.j2', **kwargs)
     msg.html = render_template(template + '.html.j2', **kwargs)
-    thr = Thread(target=send_async_email, args=[app, msg])
+    thr = Thread(target=send_async_email,
+                 args=[current_app._get_current_object(), msg])
     thr.start()
     return thr