diff --git a/qa/rpc-tests/bip68-sequence.py b/qa/rpc-tests/bip68-sequence.py
index bd61282fa..84f941da3 100755
--- a/qa/rpc-tests/bip68-sequence.py
+++ b/qa/rpc-tests/bip68-sequence.py
@@ -13,7 +13,6 @@ from test_framework.script import *
 from test_framework.mininode import *
 from test_framework.blocktools import *
 
-COIN = 100000000
 SEQUENCE_LOCKTIME_DISABLE_FLAG = (1<<31)
 SEQUENCE_LOCKTIME_TYPE_FLAG = (1<<22) # this means use time (0 means height)
 SEQUENCE_LOCKTIME_GRANULARITY = 9 # this is a bit-shift
diff --git a/qa/rpc-tests/invalidblockrequest.py b/qa/rpc-tests/invalidblockrequest.py
index f91a8da01..daad312d3 100755
--- a/qa/rpc-tests/invalidblockrequest.py
+++ b/qa/rpc-tests/invalidblockrequest.py
@@ -78,8 +78,8 @@ class InvalidBlockRequestTest(ComparisonTestFramework):
         self.block_time += 1
 
         # chr(81) is OP_TRUE
-        tx1 = create_transaction(self.block1.vtx[0], 0, chr(81), 50*100000000)
-        tx2 = create_transaction(tx1, 0, chr(81), 50*100000000)
+        tx1 = create_transaction(self.block1.vtx[0], 0, chr(81), 50 * COIN)
+        tx2 = create_transaction(tx1, 0, chr(81), 50 * COIN)
 
         block2.vtx.extend([tx1, tx2])
         block2.hashMerkleRoot = block2.calc_merkle_root()
@@ -103,7 +103,7 @@ class InvalidBlockRequestTest(ComparisonTestFramework):
         '''
         block3 = create_block(self.tip, create_coinbase(height), self.block_time)
         self.block_time += 1
-        block3.vtx[0].vout[0].nValue = 100*100000000 # Too high!
+        block3.vtx[0].vout[0].nValue = 100 * COIN # Too high!
         block3.vtx[0].sha256=None
         block3.vtx[0].calc_sha256()
         block3.hashMerkleRoot = block3.calc_merkle_root()
diff --git a/qa/rpc-tests/invalidtxrequest.py b/qa/rpc-tests/invalidtxrequest.py
index c2fe4f1df..8fe471ccd 100755
--- a/qa/rpc-tests/invalidtxrequest.py
+++ b/qa/rpc-tests/invalidtxrequest.py
@@ -63,7 +63,7 @@ class InvalidTxRequestTest(ComparisonTestFramework):
 
         # chr(100) is OP_NOTIF
         # Transaction will be rejected with code 16 (REJECT_INVALID)
-        tx1 = create_transaction(self.block1.vtx[0], 0, chr(100), 50*100000000 - 12000)
+        tx1 = create_transaction(self.block1.vtx[0], 0, chr(100), 50 * COIN - 12000)
         yield TestInstance([[tx1, RejectResult(16, 'mandatory-script-verify-flag-failed')]])
 
         # TODO: test further transactions...
diff --git a/qa/rpc-tests/listtransactions.py b/qa/rpc-tests/listtransactions.py
index 45ede8f04..da1e98dc3 100755
--- a/qa/rpc-tests/listtransactions.py
+++ b/qa/rpc-tests/listtransactions.py
@@ -7,7 +7,7 @@
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
-from test_framework.mininode import CTransaction
+from test_framework.mininode import CTransaction, COIN
 import cStringIO
 import binascii
 
@@ -192,7 +192,7 @@ class ListTransactionsTest(BitcoinTestFramework):
 
         # Replace tx3, and check that tx4 becomes unknown
         tx3_b = tx3_modified
-        tx3_b.vout[0].nValue -= 0.004*100000000 # bump the fee
+        tx3_b.vout[0].nValue -= 0.004 * COIN # bump the fee
         tx3_b = binascii.hexlify(tx3_b.serialize()).decode('utf-8')
         tx3_b_signed = self.nodes[0].signrawtransaction(tx3_b)['hex']
         txid_3b = self.nodes[0].sendrawtransaction(tx3_b_signed, True)
diff --git a/qa/rpc-tests/maxuploadtarget.py b/qa/rpc-tests/maxuploadtarget.py
index 4d6b343f7..2517bed47 100755
--- a/qa/rpc-tests/maxuploadtarget.py
+++ b/qa/rpc-tests/maxuploadtarget.py
@@ -176,7 +176,7 @@ class MaxUploadTest(BitcoinTestFramework):
         getdata_request.inv.append(CInv(2, big_old_block))
 
         max_bytes_per_day = 200*1024*1024
-        daily_buffer = 144 * 1000000
+        daily_buffer = 144 * MAX_BLOCK_SIZE
         max_bytes_available = max_bytes_per_day - daily_buffer
         success_count = max_bytes_available / old_block_size
 
diff --git a/qa/rpc-tests/mempool_packages.py b/qa/rpc-tests/mempool_packages.py
index 47c1028b9..6109cb026 100755
--- a/qa/rpc-tests/mempool_packages.py
+++ b/qa/rpc-tests/mempool_packages.py
@@ -59,13 +59,12 @@ class MempoolPackagesTest(BitcoinTestFramework):
         descendant_count = 1
         descendant_fees = 0
         descendant_size = 0
-        SATOSHIS = 100000000
 
         for x in reversed(chain):
             assert_equal(mempool[x]['descendantcount'], descendant_count)
             descendant_fees += mempool[x]['fee']
             assert_equal(mempool[x]['modifiedfee'], mempool[x]['fee'])
-            assert_equal(mempool[x]['descendantfees'], SATOSHIS*descendant_fees)
+            assert_equal(mempool[x]['descendantfees'], descendant_fees * COIN)
             descendant_size += mempool[x]['size']
             assert_equal(mempool[x]['descendantsize'], descendant_size)
             descendant_count += 1
@@ -78,7 +77,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
         descendant_fees = 0
         for x in reversed(chain):
             descendant_fees += mempool[x]['fee']
-            assert_equal(mempool[x]['descendantfees'], SATOSHIS*descendant_fees+1000)
+            assert_equal(mempool[x]['descendantfees'], descendant_fees * COIN + 1000)
 
         # Adding one more transaction on to the chain should fail.
         try:
@@ -106,7 +105,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
             descendant_fees += mempool[x]['fee']
             if (x == chain[-1]):
                 assert_equal(mempool[x]['modifiedfee'], mempool[x]['fee']+satoshi_round(0.00002))
-            assert_equal(mempool[x]['descendantfees'], SATOSHIS*descendant_fees+2000)
+            assert_equal(mempool[x]['descendantfees'], descendant_fees * COIN + 2000)
 
         # TODO: check that node1's mempool is as expected
 
diff --git a/qa/rpc-tests/mempool_reorg.py b/qa/rpc-tests/mempool_reorg.py
index 40684e7fb..5e9856e5d 100755
--- a/qa/rpc-tests/mempool_reorg.py
+++ b/qa/rpc-tests/mempool_reorg.py
@@ -25,14 +25,6 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         self.is_network_split = False
         self.sync_all()
 
-    def create_tx(self, from_txid, to_address, amount):
-        inputs = [{ "txid" : from_txid, "vout" : 0}]
-        outputs = { to_address : amount }
-        rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
-        signresult = self.nodes[0].signrawtransaction(rawtx)
-        assert_equal(signresult["complete"], True)
-        return signresult["hex"]
-
     def run_test(self):
         start_count = self.nodes[0].getblockcount()
 
@@ -52,9 +44,9 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         # and make sure the mempool code behaves correctly.
         b = [ self.nodes[0].getblockhash(n) for n in range(101, 105) ]
         coinbase_txids = [ self.nodes[0].getblock(h)['tx'][0] for h in b ]
-        spend_101_raw = self.create_tx(coinbase_txids[1], node1_address, 49.99)
-        spend_102_raw = self.create_tx(coinbase_txids[2], node0_address, 49.99)
-        spend_103_raw = self.create_tx(coinbase_txids[3], node0_address, 49.99)
+        spend_101_raw = create_tx(self.nodes[0], coinbase_txids[1], node1_address, 49.99)
+        spend_102_raw = create_tx(self.nodes[0], coinbase_txids[2], node0_address, 49.99)
+        spend_103_raw = create_tx(self.nodes[0], coinbase_txids[3], node0_address, 49.99)
 
         # Create a block-height-locked transaction which will be invalid after reorg
         timelock_tx = self.nodes[0].createrawtransaction([{"txid": coinbase_txids[0], "vout": 0}], {node0_address: 49.99})
@@ -71,8 +63,8 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         assert_raises(JSONRPCException, self.nodes[0].sendrawtransaction, timelock_tx)
 
         # Create 102_1 and 103_1:
-        spend_102_1_raw = self.create_tx(spend_102_id, node1_address, 49.98)
-        spend_103_1_raw = self.create_tx(spend_103_id, node1_address, 49.98)
+        spend_102_1_raw = create_tx(self.nodes[0], spend_102_id, node1_address, 49.98)
+        spend_103_1_raw = create_tx(self.nodes[0], spend_103_id, node1_address, 49.98)
 
         # Broadcast and mine 103_1:
         spend_103_1_id = self.nodes[0].sendrawtransaction(spend_103_1_raw)
diff --git a/qa/rpc-tests/mempool_resurrect_test.py b/qa/rpc-tests/mempool_resurrect_test.py
index 9fcc88a2a..0ba46e6f5 100755
--- a/qa/rpc-tests/mempool_resurrect_test.py
+++ b/qa/rpc-tests/mempool_resurrect_test.py
@@ -21,14 +21,6 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         self.nodes.append(start_node(0, self.options.tmpdir, args))
         self.is_network_split = False
 
-    def create_tx(self, from_txid, to_address, amount):
-        inputs = [{ "txid" : from_txid, "vout" : 0}]
-        outputs = { to_address : amount }
-        rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
-        signresult = self.nodes[0].signrawtransaction(rawtx)
-        assert_equal(signresult["complete"], True)
-        return signresult["hex"]
-
     def run_test(self):
         node0_address = self.nodes[0].getnewaddress()
         # Spend block 1/2/3's coinbase transactions
@@ -43,13 +35,13 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
 
         b = [ self.nodes[0].getblockhash(n) for n in range(1, 4) ]
         coinbase_txids = [ self.nodes[0].getblock(h)['tx'][0] for h in b ]
-        spends1_raw = [ self.create_tx(txid, node0_address, 49.99) for txid in coinbase_txids ]
+        spends1_raw = [ create_tx(self.nodes[0], txid, node0_address, 49.99) for txid in coinbase_txids ]
         spends1_id = [ self.nodes[0].sendrawtransaction(tx) for tx in spends1_raw ]
 
         blocks = []
         blocks.extend(self.nodes[0].generate(1))
 
-        spends2_raw = [ self.create_tx(txid, node0_address, 49.98) for txid in spends1_id ]
+        spends2_raw = [ create_tx(self.nodes[0], txid, node0_address, 49.98) for txid in spends1_id ]
         spends2_id = [ self.nodes[0].sendrawtransaction(tx) for tx in spends2_raw ]
 
         blocks.extend(self.nodes[0].generate(1))
diff --git a/qa/rpc-tests/mempool_spendcoinbase.py b/qa/rpc-tests/mempool_spendcoinbase.py
index 16f512db3..507b5ff41 100755
--- a/qa/rpc-tests/mempool_spendcoinbase.py
+++ b/qa/rpc-tests/mempool_spendcoinbase.py
@@ -26,14 +26,6 @@ class MempoolSpendCoinbaseTest(BitcoinTestFramework):
         self.nodes.append(start_node(0, self.options.tmpdir, args))
         self.is_network_split = False
 
-    def create_tx(self, from_txid, to_address, amount):
-        inputs = [{ "txid" : from_txid, "vout" : 0}]
-        outputs = { to_address : amount }
-        rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
-        signresult = self.nodes[0].signrawtransaction(rawtx)
-        assert_equal(signresult["complete"], True)
-        return signresult["hex"]
-
     def run_test(self):
         chain_height = self.nodes[0].getblockcount()
         assert_equal(chain_height, 200)
@@ -44,7 +36,7 @@ class MempoolSpendCoinbaseTest(BitcoinTestFramework):
         # is too immature to spend.
         b = [ self.nodes[0].getblockhash(n) for n in range(101, 103) ]
         coinbase_txids = [ self.nodes[0].getblock(h)['tx'][0] for h in b ]
-        spends_raw = [ self.create_tx(txid, node0_address, 49.99) for txid in coinbase_txids ]
+        spends_raw = [ create_tx(self.nodes[0], txid, node0_address, 49.99) for txid in coinbase_txids ]
 
         spend_101_id = self.nodes[0].sendrawtransaction(spends_raw[0])
 
diff --git a/qa/rpc-tests/prioritise_transaction.py b/qa/rpc-tests/prioritise_transaction.py
index 4a79d38da..506466705 100755
--- a/qa/rpc-tests/prioritise_transaction.py
+++ b/qa/rpc-tests/prioritise_transaction.py
@@ -9,8 +9,8 @@
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
+from test_framework.mininode import COIN
 
-COIN = 100000000
 
 class PrioritiseTransactionTest(BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/replace-by-fee.py b/qa/rpc-tests/replace-by-fee.py
index ba1956853..eded24f40 100755
--- a/qa/rpc-tests/replace-by-fee.py
+++ b/qa/rpc-tests/replace-by-fee.py
@@ -13,7 +13,6 @@ from test_framework.script import *
 from test_framework.mininode import *
 import binascii
 
-COIN = 100000000
 MAX_REPLACEMENT_LIMIT = 100
 
 def satoshi_round(amount):
diff --git a/qa/rpc-tests/test_framework/blocktools.py b/qa/rpc-tests/test_framework/blocktools.py
index 7eea41b75..b075f69c4 100644
--- a/qa/rpc-tests/test_framework/blocktools.py
+++ b/qa/rpc-tests/test_framework/blocktools.py
@@ -45,7 +45,7 @@ def create_coinbase(height, pubkey = None):
     coinbase.vin.append(CTxIn(COutPoint(0, 0xffffffff), 
                 ser_string(serialize_script_num(height)), 0xffffffff))
     coinbaseoutput = CTxOut()
-    coinbaseoutput.nValue = 50*100000000
+    coinbaseoutput.nValue = 50 * COIN
     halvings = int(height/150) # regtest
     coinbaseoutput.nValue >>= halvings
     if (pubkey != None):
diff --git a/qa/rpc-tests/test_framework/mininode.py b/qa/rpc-tests/test_framework/mininode.py
index 81bb439ce..934d0c7a7 100755
--- a/qa/rpc-tests/test_framework/mininode.py
+++ b/qa/rpc-tests/test_framework/mininode.py
@@ -38,6 +38,8 @@ MY_SUBVERSION = "/python-mininode-tester:0.0.1/"
 MAX_INV_SZ = 50000
 MAX_BLOCK_SIZE = 1000000
 
+COIN = 100000000L # 1 btc in satoshis
+
 # Keep our own socket map for asyncore, so that we can track disconnects
 # ourselves (to workaround an issue with closing an asyncore socket when 
 # using select)
@@ -377,7 +379,7 @@ class CTxOut(object):
 
     def __repr__(self):
         return "CTxOut(nValue=%i.%08i scriptPubKey=%s)" \
-            % (self.nValue // 100000000, self.nValue % 100000000,
+            % (self.nValue // COIN, self.nValue % COIN,
                binascii.hexlify(self.scriptPubKey))
 
 
@@ -426,7 +428,7 @@ class CTransaction(object):
     def is_valid(self):
         self.calc_sha256()
         for tout in self.vout:
-            if tout.nValue < 0 or tout.nValue > 21000000L * 100000000L:
+            if tout.nValue < 0 or tout.nValue > 21000000 * COIN:
                 return False
         return True
 
diff --git a/qa/rpc-tests/test_framework/util.py b/qa/rpc-tests/test_framework/util.py
index 8c472a518..ce3102988 100644
--- a/qa/rpc-tests/test_framework/util.py
+++ b/qa/rpc-tests/test_framework/util.py
@@ -493,6 +493,14 @@ def gen_return_txouts():
         txouts = txouts + script_pubkey
     return txouts
 
+def create_tx(node, coinbase, to_address, amount):
+    inputs = [{ "txid" : coinbase, "vout" : 0}]
+    outputs = { to_address : amount }
+    rawtx = node.createrawtransaction(inputs, outputs)
+    signresult = node.signrawtransaction(rawtx)
+    assert_equal(signresult["complete"], True)
+    return signresult["hex"]
+
 def create_lots_of_big_transactions(node, txouts, utxos, fee):
     addr = node.getnewaddress()
     txids = []
diff --git a/qa/rpc-tests/wallet.py b/qa/rpc-tests/wallet.py
index 6cd879e4a..3cd495deb 100755
--- a/qa/rpc-tests/wallet.py
+++ b/qa/rpc-tests/wallet.py
@@ -267,10 +267,6 @@ class WalletTest (BitcoinTestFramework):
             stop_nodes(self.nodes)
             wait_bitcoinds()
             self.nodes = start_nodes(3, self.options.tmpdir, [[m]] * 3)
-            connect_nodes_bi(self.nodes,0,1)
-            connect_nodes_bi(self.nodes,1,2)
-            connect_nodes_bi(self.nodes,0,2)
-            self.sync_all()
             assert_equal(balance_nodes, [self.nodes[i].getbalance() for i in range(3)])
 
 
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index 43e8ae9b3..b99f952a0 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -200,6 +200,8 @@ BOOST_AUTO_TEST_CASE(util_ParseMoney)
     BOOST_CHECK_EQUAL(ret, COIN*10);
     BOOST_CHECK(ParseMoney("1.00", ret));
     BOOST_CHECK_EQUAL(ret, COIN);
+    BOOST_CHECK(ParseMoney("1", ret));
+    BOOST_CHECK_EQUAL(ret, COIN);
     BOOST_CHECK(ParseMoney("0.1", ret));
     BOOST_CHECK_EQUAL(ret, COIN/10);
     BOOST_CHECK(ParseMoney("0.01", ret));
@@ -219,6 +221,9 @@ BOOST_AUTO_TEST_CASE(util_ParseMoney)
 
     // Attempted 63 bit overflow should fail
     BOOST_CHECK(!ParseMoney("92233720368.54775808", ret));
+
+    // Parsing negative amounts must fail
+    BOOST_CHECK(!ParseMoney("-1", ret));
 }
 
 BOOST_AUTO_TEST_CASE(util_IsHex)