diff --git a/tests/serialization_test.py b/tests/serialization_test.py
index ffbdf694..23c4a2d9 100644
--- a/tests/serialization_test.py
+++ b/tests/serialization_test.py
@@ -38,7 +38,7 @@ class ContextTest(testlib.RouterMixin, testlib.TestCase):
     # together (e.g. Ansible).
 
     def test_mitogen_roundtrip(self):
-        c = self.router.fork()
+        c = self.router.local()
         r = mitogen.core.Receiver(self.router)
         r.to_sender().send(c)
         c2 = r.get().unpickle()
@@ -47,7 +47,7 @@ class ContextTest(testlib.RouterMixin, testlib.TestCase):
         self.assertEquals(c.name, c2.name)
 
     def test_vanilla_roundtrip(self):
-        c = self.router.fork()
+        c = self.router.local()
         c2 = pickle.loads(pickle.dumps(c))
         self.assertEquals(None, c2.router)
         self.assertEquals(c.context_id, c2.context_id)
diff --git a/tests/signals_test.py b/tests/signals_test.py
index 5957d3fa..79b59e8a 100644
--- a/tests/signals_test.py
+++ b/tests/signals_test.py
@@ -5,7 +5,7 @@ import testlib
 import mitogen.core
 
 
-class Thing():
+class Thing:
     pass
 
 
diff --git a/tests/unix_test.py b/tests/unix_test.py
index 0bc5fc81..35acd5be 100644
--- a/tests/unix_test.py
+++ b/tests/unix_test.py
@@ -7,7 +7,6 @@ import time
 import unittest2
 
 import mitogen
-import mitogen.fork
 import mitogen.master
 import mitogen.service
 import mitogen.unix