diff --git a/qa/rpc-tests/blockchain.py b/qa/rpc-tests/blockchain.py
index 7045ae435..272a5dc15 100755
--- a/qa/rpc-tests/blockchain.py
+++ b/qa/rpc-tests/blockchain.py
@@ -28,6 +28,7 @@ class BlockchainTest(BitcoinTestFramework):
     Test blockchain-related RPC calls:
 
         - gettxoutsetinfo
+        - verifychain
 
     """
 
@@ -44,6 +45,7 @@ class BlockchainTest(BitcoinTestFramework):
     def run_test(self):
         self._test_gettxoutsetinfo()
         self._test_getblockheader()
+        self.nodes[0].verifychain(4, 0)
 
     def _test_gettxoutsetinfo(self):
         node = self.nodes[0]
diff --git a/qa/rpc-tests/mempool_limit.py b/qa/rpc-tests/mempool_limit.py
index 7914ceea2..c19a63c69 100755
--- a/qa/rpc-tests/mempool_limit.py
+++ b/qa/rpc-tests/mempool_limit.py
@@ -38,7 +38,6 @@ class MempoolLimitTest(BitcoinTestFramework):
         self.nodes[0].settxfee(0) # return to automatic fee selection
         txFS = self.nodes[0].signrawtransaction(txF['hex'])
         txid = self.nodes[0].sendrawtransaction(txFS['hex'])
-        self.nodes[0].lockunspent(True, [us0])
 
         relayfee = self.nodes[0].getnetworkinfo()['relayfee']
         base_fee = relayfee*100
diff --git a/qa/rpc-tests/wallet.py b/qa/rpc-tests/wallet.py
index 3cd495deb..e52d4e766 100755
--- a/qa/rpc-tests/wallet.py
+++ b/qa/rpc-tests/wallet.py
@@ -59,6 +59,15 @@ class WalletTest (BitcoinTestFramework):
         self.nodes[0].generate(1)
         self.sync_all()
 
+        # Exercise locking of unspent outputs
+        unspent_0 = self.nodes[2].listunspent()[0]
+        unspent_0 = {"txid": unspent_0["txid"], "vout": unspent_0["vout"]}
+        self.nodes[2].lockunspent(False, [unspent_0])
+        assert_raises(JSONRPCException, self.nodes[2].sendtoaddress, self.nodes[2].getnewaddress(), 20)
+        assert_equal([unspent_0], self.nodes[2].listlockunspent())
+        self.nodes[2].lockunspent(True, [unspent_0])
+        assert_equal(len(self.nodes[2].listlockunspent()), 0)
+
         # Have node1 generate 100 blocks (so node0 can recover the fee)
         self.nodes[1].generate(100)
         self.sync_all()
@@ -148,6 +157,10 @@ class WalletTest (BitcoinTestFramework):
 
         assert(txid1 in self.nodes[3].getrawmempool())
 
+        # Exercise balance rpcs
+        assert_equal(self.nodes[0].getwalletinfo()["unconfirmed_balance"], 1)
+        assert_equal(self.nodes[0].getunconfirmedbalance(), 1)
+
         #check if we can list zero value tx as available coins
         #1. create rawtx
         #2. hex-changed one output to 0.0
@@ -251,7 +264,7 @@ class WalletTest (BitcoinTestFramework):
 
         #check if wallet or blochchain maintenance changes the balance
         self.sync_all()
-        self.nodes[0].generate(1)
+        blocks = self.nodes[0].generate(2)
         self.sync_all()
         balance_nodes = [self.nodes[i].getbalance() for i in range(3)]
 
@@ -269,6 +282,12 @@ class WalletTest (BitcoinTestFramework):
             self.nodes = start_nodes(3, self.options.tmpdir, [[m]] * 3)
             assert_equal(balance_nodes, [self.nodes[i].getbalance() for i in range(3)])
 
+        # Exercise listsinceblock with the last two blocks
+        coinbase_tx_1 = self.nodes[0].listsinceblock(blocks[0])
+        assert_equal(coinbase_tx_1["lastblock"], blocks[1])
+        assert_equal(len(coinbase_tx_1["transactions"]), 1)
+        assert_equal(coinbase_tx_1["transactions"][0]["blockhash"], blocks[1])
+        assert_equal(len(self.nodes[0].listsinceblock(blocks[1])["transactions"]), 0)
 
 if __name__ == '__main__':
     WalletTest ().main ()