diff --git a/kademlia/protocol.py b/kademlia/protocol.py
index 038246c..c7fa9d3 100644
--- a/kademlia/protocol.py
+++ b/kademlia/protocol.py
@@ -1,4 +1,5 @@
 import random
+import asyncio
 from logging import getLogger
 
 from rpcudp.protocol import RPCProtocol
diff --git a/kademlia/tests/test_node.py b/kademlia/tests/test_node.py
index 60ca14b..fb797ee 100644
--- a/kademlia/tests/test_node.py
+++ b/kademlia/tests/test_node.py
@@ -1,7 +1,7 @@
+import unittest
 import random
 import hashlib
 
-from twisted.trial import unittest
 
 from kademlia.node import Node, NodeHeap
 from kademlia.tests.utils import mknode
@@ -9,15 +9,15 @@ from kademlia.tests.utils import mknode
 
 class NodeTest(unittest.TestCase):
     def test_longID(self):
-        rid = hashlib.sha1(str(random.getrandbits(255))).digest()
+        rid = hashlib.sha1(str(random.getrandbits(255)).encode()).digest()
         n = Node(rid)
-        self.assertEqual(n.long_id, long(rid.encode('hex'), 16))
+        self.assertEqual(n.long_id, int(rid.hex(), 16))
 
     def test_distanceCalculation(self):
-        ridone = hashlib.sha1(str(random.getrandbits(255)))
-        ridtwo = hashlib.sha1(str(random.getrandbits(255)))
+        ridone = hashlib.sha1(str(random.getrandbits(255)).encode())
+        ridtwo = hashlib.sha1(str(random.getrandbits(255)).encode())
 
-        shouldbe = long(ridone.hexdigest(), 16) ^ long(ridtwo.hexdigest(), 16)
+        shouldbe = int(ridone.hexdigest(), 16) ^ int(ridtwo.hexdigest(), 16)
         none = Node(ridone.digest())
         ntwo = Node(ridtwo.digest())
         self.assertEqual(none.distanceTo(ntwo), shouldbe)
diff --git a/kademlia/tests/test_routing.py b/kademlia/tests/test_routing.py
index 460302a..8c77b53 100644
--- a/kademlia/tests/test_routing.py
+++ b/kademlia/tests/test_routing.py
@@ -1,4 +1,4 @@
-from twisted.trial import unittest
+import unittest
 
 from kademlia.routing import KBucket
 from kademlia.tests.utils import mknode, FakeProtocol
diff --git a/kademlia/tests/test_utils.py b/kademlia/tests/test_utils.py
index d667657..073d0c3 100644
--- a/kademlia/tests/test_utils.py
+++ b/kademlia/tests/test_utils.py
@@ -1,16 +1,15 @@
 import hashlib
-
-from twisted.trial import unittest
+import unittest
 
 from kademlia.utils import digest, sharedPrefix, OrderedSet
 
 
 class UtilsTest(unittest.TestCase):
     def test_digest(self):
-        d = hashlib.sha1('1').digest()
+        d = hashlib.sha1(b'1').digest()
         self.assertEqual(d, digest(1))
 
-        d = hashlib.sha1('another').digest()
+        d = hashlib.sha1(b'another').digest()
         self.assertEqual(d, digest('another'))
 
     def test_sharedPrefix(self):
diff --git a/kademlia/tests/utils.py b/kademlia/tests/utils.py
index 1c4da17..d6f4d07 100644
--- a/kademlia/tests/utils.py
+++ b/kademlia/tests/utils.py
@@ -15,7 +15,7 @@ def mknode(id=None, ip=None, port=None, intid=None):
     """
     if intid is not None:
         id = pack('>l', intid)
-    id = id or hashlib.sha1(str(random.getrandbits(255))).digest()
+    id = id or hashlib.sha1(str(random.getrandbits(255)).encode()).digest()
     return Node(id, ip, port)