diff -ru testresources-0.2.4/lib/testresources/__init__.py testresources-0.2.4-patched/lib/testresources/__init__.py
--- testresources-0.2.4/lib/testresources/__init__.py	2010-02-26 23:46:44.000000000 +0100
+++ testresources-0.2.4-patched/lib/testresources/__init__.py	2011-05-16 15:49:06.000000000 +0200
@@ -561,7 +561,7 @@
         :return: The new resource.
         :param result: An optional TestResult to report resource changes to.
         """
-        if self._dirty:
+        if self.isDirty():
             self._clean_all(old_resource, result)
             resource = self._make_all(result)
         else:
diff -ru testresources-0.2.4/lib/testresources/tests/test_test_resource.py testresources-0.2.4-patched/lib/testresources/tests/test_test_resource.py
--- testresources-0.2.4/lib/testresources/tests/test_test_resource.py	2010-02-26 23:38:19.000000000 +0100
+++ testresources-0.2.4-patched/lib/testresources/tests/test_test_resource.py	2011-05-16 15:47:25.000000000 +0200
@@ -208,6 +208,17 @@
         self.assertEqual(1, resource_manager.resets)
         resource_manager.finishedWith(resource)
 
+    def testIsResetIfDependenciesAreDirty(self):
+        resource_manager = MockResource()
+        dep1 = MockResource()
+        resource_manager.resources.append(("dep1", dep1))
+        r = resource_manager.getResource()
+        dep1.dirtied(r.dep1)
+        # if we get the resource again, it should be clean
+        r = resource_manager.getResource()
+        self.assertFalse(resource_manager.isDirty())
+        self.assertFalse(dep1.isDirty())
+
     def testUsedResourceResetBetweenUses(self):
         resource_manager = MockResettableResource()
         # take two refs; like happens with OptimisingTestSuite.