diff --git a/certbot-nginx/certbot_nginx/nginxparser.py b/certbot-nginx/certbot_nginx/nginxparser.py
index caf6fe725..765194806 100644
--- a/certbot-nginx/certbot_nginx/nginxparser.py
+++ b/certbot-nginx/certbot_nginx/nginxparser.py
@@ -216,7 +216,7 @@ class UnspacedList(list):
         self.spaced.__delitem__(i + self._spaces_before(i))
         list.__delitem__(self, i)
 
-    def __deepcopy__(self, memo):
+    def __deepcopy__(self, unused_memo):
         l = UnspacedList(self[:])
         l.spaced = copy.deepcopy(self.spaced)
         return l
diff --git a/certbot-nginx/certbot_nginx/tests/parser_test.py b/certbot-nginx/certbot_nginx/tests/parser_test.py
index 8ac995dfc..6d046178a 100644
--- a/certbot-nginx/certbot_nginx/tests/parser_test.py
+++ b/certbot-nginx/certbot_nginx/tests/parser_test.py
@@ -126,7 +126,7 @@ class NginxParserTest(util.NginxTest):
         nparser.add_server_directives(nparser.abs_path('nginx.conf'),
                                       set(['localhost',
                                            r'~^(www\.)?(example|bar)\.']),
-                                      [['foo', 'bar'], ['ssl_certificate',
+                                      [['foo', 'bar'], ['\n ', 'ssl_certificate', ' ',
                                                         '/etc/ssl/cert.pem']],
                                       replace=False)
         ssl_re = re.compile(r'\n\s+ssl_certificate /etc/ssl/cert.pem')