diff --git a/green/test/test_plugin.py b/green/test/test_plugin.py
index <HASH>..<HASH> 100644
--- a/green/test/test_plugin.py
+++ b/green/test/test_plugin.py
@@ -18,7 +18,7 @@ class TestPlugin(PluginTester, unittest.TestCase):
     def test_NOSE_GREEN_setsEnabled(self):
         parser = MagicMock()
         self.assertEqual(self.g.enabled, False)
-        self.g.options(parser, env={'NOSE_GREEN':'1'})
+        self.g.options(parser, env={'NOSE_WITH_GREEN':'1'})
         self.assertEqual(self.g.enabled, True)
Updated the options test to match with the updated environment variable.