Fix warning

[cascardo/ipsilon.git] / tests / helpers / http.py

diff --git a/tests/helpers/http.py b/tests/helpers/http.py
index 425d6b7..833637f 100755 (executable)
--- a/tests/helpers/http.py
+++ b/tests/helpers/http.py
@@ -37,7 +37,7 @@ class PageTree(object):
 
     @property
     def tree(self):
-        if not self._tree:
+        if self._tree is None:
             self._tree = html.fromstring(self.text)
         return self._tree