diff --git a/test/functional/rpc_fundrawtransaction.py b/test/functional/rpc_fundrawtransaction.py
--- a/test/functional/rpc_fundrawtransaction.py
+++ b/test/functional/rpc_fundrawtransaction.py
@@ -488,8 +488,8 @@
         rawTx = self.nodes[1].createrawtransaction(inputs, outputs)
         # fund a transaction that requires a new key for the change output
         # creating the key must be impossible because the wallet is locked
-        assert_raises_rpc_error(
-            -4, "Insufficient funds", self.nodes[1].fundrawtransaction, rawtx)
+        assert_raises_rpc_error(-4, "Keypool ran out, please call keypoolrefill first",
+                                self.nodes[1].fundrawtransaction, rawTx)
 
         # refill the keypool
         self.nodes[1].walletpassphrase("test", 100)