diff --git a/tests/Node.py b/tests/Node.py
index 06d2afa939..a2b95f4acc 100644
--- a/tests/Node.py
+++ b/tests/Node.py
@@ -154,7 +154,7 @@ def getTransBlockNum(trans):
             cntxt.add("processed")
             cntxt.add("action_traces")
             cntxt.index(0)
-            if cntxt.hasKey("except"):
+            if not cntxt.isSectionNull("except"):
                 return "no_block"
             return cntxt.add("block_num")