Support nose framework for the whole test suite.

--HG--
branch : trunk
diff --git a/tests/test_tests.py b/tests/test_tests.py
index e210b4b..e3e6f0f 100644
--- a/tests/test_tests.py
+++ b/tests/test_tests.py
@@ -8,6 +8,8 @@
 """
 from jinja2 import Environment, Markup
 
+import conftest
+
 
 DEFINED = '''{{ missing is defined }}|{{ true is defined }}'''
 EVEN = '''{{ 1 is even }}|{{ 2 is even }}'''