diff --git a/tests/testutil.py b/tests/testutil.py
index 74ae8f24cfae926af23fe02f6de24dfdd83ffc89..def907546f82095bf0f4d7bedc94392732cbde31 100644
--- a/tests/testutil.py
+++ b/tests/testutil.py
@@ -271,6 +271,9 @@ class TestConfig:
     def books_loader(self):
         return self._books_loader
 
+    def books_repo(self):
+        return None
+
     def config_file_path(self):
         return test_path('userconfig/conservancy_beancount/config.ini')