univalue: Return more detailed type check error messages

1 files changed, 1 insertions, 1 deletions

diff --git a/test/functional/rpc_fundrawtransaction.py b/test/functional/rpc_fundrawtransaction.py
index 948deaaec4..cf9ad3f458 100755
--- a/test/functional/rpc_fundrawtransaction.py
+++ b/test/functional/rpc_fundrawtransaction.py
@@ -301,7 +301,7 @@ class RawTransactionsTest(BitcoinTestFramework):
         inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
         outputs = { self.nodes[0].getnewaddress() : Decimal(4.0) }
         rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
-        assert_raises_rpc_error(-1, "JSON value is not a string as expected", self.nodes[2].fundrawtransaction, rawtx, {'change_type': None})
+        assert_raises_rpc_error(-1, "JSON value of type null is not of expected type string", self.nodes[2].fundrawtransaction, rawtx, {'change_type': None})
         assert_raises_rpc_error(-5, "Unknown change type ''", self.nodes[2].fundrawtransaction, rawtx, {'change_type': ''})
         rawtx = self.nodes[2].fundrawtransaction(rawtx, {'change_type': 'bech32'})
         dec_tx = self.nodes[2].decoderawtransaction(rawtx['hex'])