diff --git a/src/wallet/test/wallet_tests.cpp b/src/wallet/test/wallet_tests.cpp
--- a/src/wallet/test/wallet_tests.cpp
+++ b/src/wallet/test/wallet_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2016 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/test/functional/feature_block.py b/test/functional/feature_block.py
--- a/test/functional/feature_block.py
+++ b/test/functional/feature_block.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # Copyright (c) 2015-2017 The Bitcoin Core developers
-# Copyright (c) 2017 The Bitcoin developers
+# Copyright (c) 2019 The Bitcoin developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test block processing."""
@@ -133,12 +133,6 @@
         for TxTemplate in invalid_txs.iter_all_templates():
             template = TxTemplate(spend_tx=attempt_spend_tx)
 
-            # Something about the serialization code for missing inputs creates
-            # a different hash in the test client than on bitcoind, resulting
-            # in a mismatching merkle root during block validation.
-            # Skip until we figure out what's going on.
-            if TxTemplate == invalid_txs.InputMissing:
-                continue
             if template.valid_in_block:
                 continue
 
@@ -148,7 +142,8 @@
             blockname = "for_invalid.{}".format(TxTemplate.__name__)
             badblock = self.next_block(blockname)
             badtx = template.get_tx()
-            self.sign_tx(badtx, attempt_spend_tx)
+            if TxTemplate != invalid_txs.InputMissing:
+                self.sign_tx(badtx, attempt_spend_tx)
             badtx.rehash()
             badblock = self.update_block(blockname, [badtx])
             self.send_blocks(