Refactorred test.

tests/step_defs/server.py

@@ -20,7 +20,6 @@ class Server:
         self.datadir.mkdir(parents=True)
         self.settings = {}
         self.use_config = True
-        # self.env = {}
         self.process = None
         self.loop = get_event_loop()
 
@@ -77,12 +76,9 @@ class Server:
     def set_safe_port(self):
         """Set the server port to something not being used."""
         port = 9090
+        address = self.base_url.split(":")[0]
         while port == 9090:
             sock = socket()
-            if "address" in self.settings:
-                address = self.settings["address"]
-            else:
-                address = "127.0.0.1"
             sock.bind((address, 0))
             port = sock.getsockname()[1]
             sock.close()