diff --git a/certbot-apache/certbot_apache/http_01.py b/certbot-apache/certbot_apache/http_01.py
index ca3248ba0..58d87298c 100644
--- a/certbot-apache/certbot_apache/http_01.py
+++ b/certbot-apache/certbot_apache/http_01.py
@@ -99,7 +99,7 @@ class ApacheHttp01(common.TLSSNI01):
             new_conf.write(config_text)
 
     def _relevant_vhosts(self):
-        http01_port = self.configurator.config.http01_port
+        http01_port = str(self.configurator.config.http01_port)
         relevant_vhosts = []
         for vhost in self.configurator.vhosts:
             if any(a.is_wildcard() or a.get_port() == http01_port for a in vhost.addrs):
diff --git a/certbot-apache/certbot_apache/tests/http_01_test.py b/certbot-apache/certbot_apache/tests/http_01_test.py
index 1afaef0c5..346b88387 100644
--- a/certbot-apache/certbot_apache/tests/http_01_test.py
+++ b/certbot-apache/certbot_apache/tests/http_01_test.py
@@ -141,8 +141,10 @@ class ApacheHttp01Test(util.ApacheTest):
         self.common_perform_test(achalls, vhosts)
 
     def test_no_vhost(self):
+        for achall in self.achalls:
+            self.http.add_chall(achall)
         self.config.config.http01_port = 12345
-        self.assertRaises(errors.PluginError, self.http.perform, self.achalls)
+        self.assertRaises(errors.PluginError, self.http.perform)
 
     def common_perform_test(self, achalls, vhosts):
         """Tests perform with the given achalls."""