Index: pilkit-2.0/tests/test_processors.py
===================================================================
--- pilkit-2.0.orig/tests/test_processors.py
+++ pilkit-2.0/tests/test_processors.py
@@ -1,10 +1,9 @@
 from pilkit.lib import Image, ImageDraw, ImageColor
 from pilkit.processors import (Resize, ResizeToFill, ResizeToFit, SmartCrop,
                                SmartResize, MakeOpaque, ColorOverlay)
-from nose.tools import eq_, assert_true
 import os
 from pilkit.processors.resize import Thumbnail
-from .utils import create_image
+from .utils import create_image, eq_, assert_true
 import mock
 
 
Index: pilkit-2.0/tests/test_utils.py
===================================================================
--- pilkit-2.0.orig/tests/test_utils.py
+++ pilkit-2.0/tests/test_utils.py
@@ -4,10 +4,10 @@ from pilkit.exceptions import UnknownFor
 from pilkit.lib import Image
 from pilkit.utils import (extension_to_format, format_to_extension, FileWrapper,
                           save_image, prepare_image, quiet)
+from pytest import raises
 from mock import Mock, patch
-from nose.tools import eq_, raises, ok_
 from tempfile import NamedTemporaryFile
-from .utils import create_image
+from .utils import create_image, eq_, assert_true
 
 
 def test_extension_to_format():
@@ -20,14 +20,14 @@ def test_format_to_extension_no_init():
     eq_(format_to_extension('ICO'), '.ico')
 
 
-@raises(UnknownFormat)
 def test_unknown_format():
-    format_to_extension('TXT')
+    with raises(UnknownFormat):
+        format_to_extension('TXT')
 
 
-@raises(UnknownExtension)
 def test_unknown_extension():
-    extension_to_format('.txt')
+    with raises(UnknownExtension):
+        extension_to_format('.txt')
 
 
 def test_default_extension():
@@ -43,14 +43,13 @@ def test_default_extension():
     eq_(format_to_extension('JPEG'), '.jpg')
 
 
-@raises(AttributeError)
 def test_filewrapper():
 
     class K(object):
         def fileno(self):
             raise UnsupportedOperation
-
-    FileWrapper(K()).fileno()
+    with raises(AttributeError):
+        FileWrapper(K()).fileno()
 
 
 def test_save_with_filename():
@@ -71,7 +70,7 @@ def test_format_normalization():
     See https://github.com/matthewwithanm/django-imagekit/issues/262
     """
     im = Image.new('RGBA', (100, 100))
-    ok_('transparency' in prepare_image(im, 'gIF')[1])
+    assert_true('transparency' in prepare_image(im, 'gIF')[1])
 
 def test_quiet():
     """
Index: pilkit-2.0/tests/utils.py
===================================================================
--- pilkit-2.0.orig/tests/utils.py
+++ pilkit-2.0/tests/utils.py
@@ -17,3 +17,11 @@ def get_image_file():
 
 def create_image():
     return Image.open(get_image_file())
+
+
+def eq_(first, second):
+    assert first == second
+
+
+def assert_true(first):
+    assert first is True