diff --git a/test/functional/rpc_blockchain.py b/test/functional/rpc_blockchain.py
index 7a057aa771..378efb0b0e 100755
--- a/test/functional/rpc_blockchain.py
+++ b/test/functional/rpc_blockchain.py
@@ -34,6 +34,8 @@ from test_framework.blocktools import (
     TIME_GENESIS_BLOCK,
 )
 from test_framework.messages import (
+    CBlockHeader,
+    FromHex,
     msg_block,
 )
 from test_framework.mininode import (