diff --git a/tests/test_connection.py b/tests/test_connection.py
index 6486b72ba..4fa257f9a 100644
--- a/tests/test_connection.py
+++ b/tests/test_connection.py
@@ -1088,19 +1088,23 @@ def test_fundee_forget_funding_tx_unconfirmed(node_factory, bitcoind):
     # Let blocks settle.
     time.sleep(1)
 
-    # Prevent funder from broadcasting funding tx.
-    l1.bitcoind_cmd_override('exit 1')
+    def mock_sendrawtransaction(r):
+        return {'error': 'sendrawtransaction disabled'}
+
+    # Prevent funder from broadcasting funding tx (any tx really).
+    l1.daemon.rpcproxy.mock_rpc('sendrawtransaction', mock_sendrawtransaction)
+
     # Fund the channel.
     # The process will complete, but funder will be unable
     # to broadcast and confirm funding tx.
     l1.rpc.fundchannel(l2.info['id'], 10**6)
-    # Prevent l1 from timing out bitcoin-cli.
-    l1.bitcoind_cmd_remove_override()
+
     # Generate blocks until unconfirmed.
     bitcoind.generate_block(blocks)
 
     # fundee will forget channel!
     l2.daemon.wait_for_log('Forgetting channel: It has been {} blocks'.format(blocks))
+
     # fundee will also forget and disconnect from peer.
     assert len(l2.rpc.listpeers(l1.info['id'])['peers']) == 0
 
diff --git a/tests/test_misc.py b/tests/test_misc.py
index 282d4b522..a52d0cf4e 100644
--- a/tests/test_misc.py
+++ b/tests/test_misc.py
@@ -89,7 +89,12 @@ def test_bitcoin_failure(node_factory, bitcoind):
     # Make sure we're not failing it between getblockhash and getblock.
     sync_blockheight(bitcoind, [l1])
 
-    l1.bitcoind_cmd_override('exit 1')
+    def crash_bitcoincli(r):
+        return {'error': 'go away'}
+
+    # This is not a JSON-RPC response by purpose
+    l1.daemon.rpcproxy.mock_rpc('estimatesmartfee', crash_bitcoincli)
+    l1.daemon.rpcproxy.mock_rpc('getblockhash', crash_bitcoincli)
 
     # This should cause both estimatefee and getblockhash fail
     l1.daemon.wait_for_logs(['estimatesmartfee .* exited with status 1',
@@ -100,7 +105,9 @@ def test_bitcoin_failure(node_factory, bitcoind):
                              'getblockhash .* exited with status 1'])
 
     # Restore, then it should recover and get blockheight.
-    l1.bitcoind_cmd_remove_override()
+    l1.daemon.rpcproxy.mock_rpc('estimatesmartfee', None)
+    l1.daemon.rpcproxy.mock_rpc('getblockhash', None)
+
     bitcoind.generate_block(5)
     sync_blockheight(bitcoind, [l1])
 
@@ -921,6 +928,8 @@ def test_logging(node_factory):
     logpath = os.path.join(l1.daemon.lightning_dir, 'logfile')
     logpath_moved = os.path.join(l1.daemon.lightning_dir, 'logfile_moved')
 
+    l1.daemon.rpcproxy.start()
+    l1.daemon.opts['bitcoin-rpcport'] = l1.daemon.rpcproxy.rpcport
     TailableProc.start(l1.daemon)
     wait_for(lambda: os.path.exists(logpath))