diff --git a/tests/test_plugin_run.py b/tests/test_plugin_run.py
index 521193490bd94db6528af9c7f8bfdf1b8bee6d08..42838298fcb2ad28e7b71f86b10ebefa59e62cf3 100644
--- a/tests/test_plugin_run.py
+++ b/tests/test_plugin_run.py
@@ -35,7 +35,7 @@ class TransactionCounter:
 class PostingCounter(TransactionCounter):
     HOOK_GROUPS = frozenset(['Posting', 'counter'])
 
-    def run(self, txn, post):
+    def run(self, txn, post, post_index):
         return ['post:{}'.format(id(post))]