diff --git a/contrib/buildbot/test/mocks/phabricator.py b/contrib/buildbot/test/mocks/phabricator.py
--- a/contrib/buildbot/test/mocks/phabricator.py
+++ b/contrib/buildbot/test/mocks/phabricator.py
@@ -13,6 +13,14 @@
     def __init__(self, data: list):
         self.data = data
 
+    def __getitem__(self, key):
+        return self.response[key]
+
+    __getattr__ = __getitem__
+
+    def __setitem__(self, key, value):
+        self.response[key] = value
+
 
 def instance():
     phab = None
diff --git a/contrib/buildbot/test/test_phabricator.py b/contrib/buildbot/test/test_phabricator.py
--- a/contrib/buildbot/test/test_phabricator.py
+++ b/contrib/buildbot/test/test_phabricator.py
@@ -9,7 +9,6 @@
 import os
 import unittest
 
-from phabricator import Result
 from phabricator_wrapper import BITCOIN_ABC_PROJECT_PHID, BITCOIN_ABC_REPO
 import test.mocks.phabricator
 
@@ -345,8 +344,9 @@
 
         # Check the file content can be retrieved
         expected_content = b'Some nice content'
-        self.phab.file.download.return_value = Result(
-            b64encode(expected_content))
+        result = test.mocks.phabricator.Result([])
+        result.response = b64encode(expected_content)
+        self.phab.file.download.return_value = result
         configure_file_content_query()
         file_content = self.phab.get_file_content_from_master(path)
         assert_file_commit_and_file_searched()