diff --git a/tcllib/requests/serverselector.py b/tcllib/requests/serverselector.py
index 2877353..cd2236f 100644
--- a/tcllib/requests/serverselector.py
+++ b/tcllib/requests/serverselector.py
@@ -20,14 +20,18 @@ MASTER_SERVERS = [
 class ServerSelector:
     """Returns a random server to use."""
 
-    def __init__(self):
+    def __init__(self, server_list=None):
         """Init stuff"""
+        if server_list:
+            self.server_list = server_list
+        else:
+            self.server_list = MASTER_SERVERS
         self.last_server = None
 
     def get_master_server(self):
         """Return a random server."""
         while True:
-            new_server = numpy.random.choice(MASTER_SERVERS)
+            new_server = numpy.random.choice(self.server_list)
             if new_server != self.last_server:
                 break
         self.last_server = new_server
@@ -44,35 +48,35 @@ class ServerSelector:
 class ServerVoteSelector(ServerSelector):
     """Tries to return faster servers more often."""
 
-    def __init__(self):
+    def __init__(self, server_list=None):
         """Populate server list and weighting variables."""
-        self.last_server = None
-        self.master_servers_weights = [3] * len(MASTER_SERVERS)
+        super().__init__(server_list)
+        self.servers_weights = [3] * len(self.server_list)
         self.check_time_sum = 3
         self.check_time_count = 1
 
     def get_master_server(self):
         """Return weighted choice from server list."""
         weight_sum = 0
-        for i in self.master_servers_weights:
+        for i in self.servers_weights:
             weight_sum += i
         numpy_weights = []
-        for i in self.master_servers_weights:
+        for i in self.servers_weights:
             numpy_weights.append(i/weight_sum)
-        self.last_server = numpy.random.choice(MASTER_SERVERS, p=numpy_weights)
+        self.last_server = numpy.random.choice(self.server_list, p=numpy_weights)
         return self.last_server
 
     def master_server_downvote(self):
         """Decrease weight of last chosen server."""
-        idx = MASTER_SERVERS.index(self.last_server)
-        if self.master_servers_weights[idx] > 1:
-            self.master_servers_weights[idx] -= 1
+        idx = self.server_list.index(self.last_server)
+        if self.servers_weights[idx] > 1:
+            self.servers_weights[idx] -= 1
 
     def master_server_upvote(self):
         """Increase weight of last chosen server."""
-        idx = MASTER_SERVERS.index(self.last_server)
-        if self.master_servers_weights[idx] < 10:
-            self.master_servers_weights[idx] += 1
+        idx = self.server_list.index(self.last_server)
+        if self.servers_weights[idx] < 10:
+            self.servers_weights[idx] += 1
 
     def check_time_add(self, duration):
         """Record connection time."""