diff --git a/letsencrypt/plugins/standalone.py b/letsencrypt/plugins/standalone.py
index 8e5f1e77d..4444ed2c1 100644
--- a/letsencrypt/plugins/standalone.py
+++ b/letsencrypt/plugins/standalone.py
@@ -49,7 +49,7 @@ class ServerManager(object):
             cls = BaseHTTPServer.HTTPServer
 
         try:
-            server = cls(('', port), handler)
+            server = cls(("", port), handler)
         except socket.error as error:
             errors.StandaloneBindError(error, port)
 
diff --git a/letsencrypt/plugins/standalone_test.py b/letsencrypt/plugins/standalone_test.py
new file mode 100644
index 000000000..8c0dd6f97
--- /dev/null
+++ b/letsencrypt/plugins/standalone_test.py
@@ -0,0 +1,21 @@
+"""Tests for letsencrypt.plugins.standalone."""
+import unittest
+
+
+class ServerManagerTest(unittest.TestCase):
+    """Tests for letsencrypt.plugins.standalone.ServerManager."""
+
+    def setUp(self):
+        from letsencrypt.plugins.standalone import ServerManager
+        self.certs = {}
+        self.simple_http_resources = {}
+        self.mgr = ServerManager(self.certs, self.simple_http_resources)
+
+    def test_init(self):
+        self.assertTrue(self.mgr.certs is self.certs)
+        self.assertTrue(
+            self.mgr.simple_http_resources is self.simple_http_resources)
+
+
+if __name__ == "__main__":
+    unittest.main()  # pragma: no cover