diff --git a/test-requirements.txt b/test-requirements.txt
index 446a41f..0bf6dc3 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-nose
+pytest
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
diff --git a/test/compliancetest.py b/test/compliancetest.py
index bf4e59c..a7285de 100644
--- a/test/compliancetest.py
+++ b/test/compliancetest.py
@@ -6,15 +6,13 @@ import lockfile
 
 
 class ComplianceTest(object):
-    def __init__(self):
-        self.saved_class = lockfile.LockFile
-
     def _testfile(self):
         """Return platform-appropriate file.  Helper for tests."""
         import tempfile
         return os.path.join(tempfile.gettempdir(), 'trash-%s' % os.getpid())
 
     def setup(self):
+        self.saved_class = lockfile.LockFile
         lockfile.LockFile = self.class_to_test
 
     def teardown(self):
diff --git a/tox.ini b/tox.ini
index 750ad5f..7bfd923 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@ envlist = py27,py32,py33,py34
 
 [testenv]
 deps = -r{toxinidir}/test-requirements.txt
-commands=nosetests
+commands=pytest
 
 [testenv:venv]
 commands = {posargs}