--- a/src/blockdiag/tests/test_command.py
+++ b/src/blockdiag/tests/test_command.py
@@ -16,14 +16,12 @@
 import os
 import unittest
 
-from nose.tools import nottest
 from blockdiag.command import BlockdiagApp
 from blockdiag.tests.utils import TemporaryDirectory
 
 
 class TestBlockdiagApp(unittest.TestCase):
-    @nottest
-    def test_app_cleans_up_images(self):
+    def __test_app_cleans_up_images(self):
         testdir = os.path.dirname(__file__)
         diagpath = os.path.join(testdir,
                                 'diagrams',
--- a/src/blockdiag/tests/test_generate_diagram.py
+++ b/src/blockdiag/tests/test_generate_diagram.py
@@ -19,8 +19,6 @@
 import unittest
 from xml.etree import ElementTree
 
-from nose.tools import nottest
-
 import blockdiag
 import blockdiag.command
 from blockdiag.tests.utils import (TemporaryDirectory, capture_stderr,
@@ -66,7 +64,6 @@
         yield testcase
 
 
-@nottest
 def testcase_generator(basepath, mainfunc, files, options):
     fontpath = get_fontpath(basepath)
     options = options + ['-f', fontpath]
