diff --git a/contrib/buildbot/phabricator_wrapper.py b/contrib/buildbot/phabricator_wrapper.py
--- a/contrib/buildbot/phabricator_wrapper.py
+++ b/contrib/buildbot/phabricator_wrapper.py
@@ -368,7 +368,7 @@
 
     def get_revision_changed_files(self, revision_id):
         return list(self.differential.getcommitpaths(
-            revision_id=int(revision_id)).values())
+            revision_id=int(revision_id)))
 
     def get_file_content_from_master(self, path):
         latest_commit_hash = self.get_latest_master_commit_hash()
diff --git a/contrib/buildbot/test/test_endpoint_buildDiff.py b/contrib/buildbot/test/test_endpoint_buildDiff.py
--- a/contrib/buildbot/test/test_endpoint_buildDiff.py
+++ b/contrib/buildbot/test/test_endpoint_buildDiff.py
@@ -56,11 +56,11 @@
             ]
 
             self.phab.differential.getcommitpaths = mock.Mock()
-            self.phab.differential.getcommitpaths.return_value = {
-                "0": "dir/subdir/file.h",
-                "1": "dir/subdir/file.cpp",
-                "2": "someotherdir/file2.txt",
-            }
+            self.phab.differential.getcommitpaths.return_value = [
+                "dir/subdir/file.h",
+                "dir/subdir/file.cpp",
+                "someotherdir/file2.txt",
+            ]
 
             response = self.app.post(
                 '/buildDiff{}'.format(data),
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
@@ -246,10 +246,10 @@
             "0000000000000000000000000000000123456789")
 
     def test_get_revision_changed_files(self):
-        self.phab.differential.getcommitpaths.return_value = {
-            "0": "file1",
-            "1": "dir/file2",
-        }
+        self.phab.differential.getcommitpaths.return_value = [
+            "file1",
+            "dir/file2",
+        ]
         self.assertEqual(
             self.phab.get_revision_changed_files(1234),
             [