diff --git a/test/functional/feature_bip68_sequence.py b/test/functional/feature_bip68_sequence.py
--- a/test/functional/feature_bip68_sequence.py
+++ b/test/functional/feature_bip68_sequence.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test BIP68 implementation
-#
+"""Test BIP68 implementation."""
 
 import time
 
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
@@ -3,6 +3,14 @@
 # Copyright (c) 2017 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.
+
+This reimplements tests from the bitcoinj/FullBlockTestGenerator used
+by the pull-tester.
+
+We use the testing framework in which we expect a particular answer from
+each test.
+"""
 
 import copy
 import struct
@@ -63,15 +71,6 @@
         self.tx = tx
         self.n = n  # the output we're spending
 
-
-'''
-This reimplements tests from the bitcoinj/FullBlockTestGenerator used
-by the pull-tester.
-
-We use the testing framework in which we expect a particular answer from
-each test.
-'''
-
 #  Use this class for tests that require behavior other than normal "mininode" behavior.
 #  For now, it is used to serialize a bloated varint (b64).
 
diff --git a/test/functional/feature_maxuploadtarget.py b/test/functional/feature_maxuploadtarget.py
--- a/test/functional/feature_maxuploadtarget.py
+++ b/test/functional/feature_maxuploadtarget.py
@@ -2,16 +2,15 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-'''
-Test behavior of -maxuploadtarget.
+"""Test behavior of -maxuploadtarget.
 
 * Verify that getdata requests for old blocks (>1week) are dropped
 if uploadtarget has been reached.
 * Verify that getdata requests for recent blocks are respecteved even
 if uploadtarget has been reached.
 * Verify that the upload counters are reset after 24 hours.
-'''
+"""
+
 from collections import defaultdict
 import time
 
diff --git a/test/functional/feature_nulldummy.py b/test/functional/feature_nulldummy.py
--- a/test/functional/feature_nulldummy.py
+++ b/test/functional/feature_nulldummy.py
@@ -2,6 +2,16 @@
 # Copyright (c) 2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test NULLDUMMY softfork.
+
+Connect to a single node.
+Generate 2 blocks (save the coinbases for later).
+Generate 427 more blocks.
+[Policy/Consensus] Check that NULLDUMMY compliant transactions are accepted in the 430th block.
+[Policy] Check that non-NULLDUMMY transactions are rejected before activation.
+[Consensus] Check that the new NULLDUMMY rules are not enforced on the 431st block.
+[Policy/Consensus] Check that the new NULLDUMMY rules are enforced on the 432nd block.
+"""
 
 import time
 
@@ -28,18 +38,6 @@
     tx.rehash()
 
 
-'''
-This test is meant to exercise NULLDUMMY softfork.
-Connect to a single node.
-Generate 2 blocks (save the coinbases for later).
-Generate 427 more blocks.
-[Policy/Consensus] Check that NULLDUMMY compliant transactions are accepted in the 430th block.
-[Policy] Check that non-NULLDUMMY transactions are rejected before activation.
-[Consensus] Check that the new NULLDUMMY rules are not enforced on the 431st block.
-[Policy/Consensus] Check that the new NULLDUMMY rules are enforced on the 432nd block.
-'''
-
-
 class NULLDUMMYTest(BitcoinTestFramework):
 
     def set_test_params(self):
diff --git a/test/functional/feature_proxy.py b/test/functional/feature_proxy.py
--- a/test/functional/feature_proxy.py
+++ b/test/functional/feature_proxy.py
@@ -2,8 +2,8 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test bitcoind with different proxy configuration.
 
-'''
 Test plan:
 - Start bitcoind's with different proxy configurations
 - Use addnode to initiate connections
@@ -25,7 +25,7 @@
 addnode connect to IPv6
 addnode connect to onion
 addnode connect to generic DNS name
-'''
+"""
 
 import os
 import socket
diff --git a/test/functional/feature_pruning.py b/test/functional/feature_pruning.py
--- a/test/functional/feature_pruning.py
+++ b/test/functional/feature_pruning.py
@@ -2,14 +2,12 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test the pruning code.
 
-#
-# Test pruning code
-# ********
-# WARNING:
-# This test uses 4GB of disk space.
-# This test takes 30 mins or more (up to 2 hours)
-# ********
+WARNING:
+This test uses 4GB of disk space.
+This test takes 30 mins or more (up to 2 hours)
+"""
 
 import time
 import os
diff --git a/test/functional/feature_reindex.py b/test/functional/feature_reindex.py
--- a/test/functional/feature_reindex.py
+++ b/test/functional/feature_reindex.py
@@ -2,10 +2,13 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test running bitcoind with -reindex and -reindex-chainstate options.
+
+- Start a single node and generate 3 blocks.
+- Stop the node and restart it with -reindex. Verify that the node has reindexed up to block 3.
+- Stop the node and restart it with -reindex-chainstate. Verify that the node has reindexed up to block 3.
+"""
 
-#
-# Test -reindex and -reindex-chainstate with CheckBlockIndex
-#
 import time
 
 from test_framework.test_framework import BitcoinTestFramework
diff --git a/test/functional/interface_http.py b/test/functional/interface_http.py
--- a/test/functional/interface_http.py
+++ b/test/functional/interface_http.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test rpc http basics
-#
+"""Test the RPC HTTP basics."""
 
 import http.client
 import urllib.parse
diff --git a/test/functional/interface_rest.py b/test/functional/interface_rest.py
--- a/test/functional/interface_rest.py
+++ b/test/functional/interface_rest.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test REST interface
-#
+"""Test the REST API."""
 
 from codecs import encode
 from decimal import Decimal
diff --git a/test/functional/mempool_limit.py b/test/functional/mempool_limit.py
--- a/test/functional/mempool_limit.py
+++ b/test/functional/mempool_limit.py
@@ -2,8 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-# Test mempool limiting together/eviction with the wallet
+"""Test mempool limiting together/eviction with the wallet."""
 
 from decimal import Decimal
 
diff --git a/test/functional/mempool_reorg.py b/test/functional/mempool_reorg.py
--- a/test/functional/mempool_reorg.py
+++ b/test/functional/mempool_reorg.py
@@ -2,11 +2,11 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test mempool re-org scenarios.
 
-#
-# Test re-org scenarios with a mempool that contains transactions
-# that spend (directly or indirectly) coinbase transactions.
-#
+Test re-org scenarios with a mempool that contains transactions
+that spend (directly or indirectly) coinbase transactions.
+"""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_raises_rpc_error, create_tx
diff --git a/test/functional/mempool_resurrect.py b/test/functional/mempool_resurrect.py
--- a/test/functional/mempool_resurrect.py
+++ b/test/functional/mempool_resurrect.py
@@ -2,11 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test resurrection of mined transactions when
-# the blockchain is re-organized.
-#
+"""Test resurrection of mined transactions when the blockchain is re-organized."""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, create_tx
diff --git a/test/functional/mempool_spend_coinbase.py b/test/functional/mempool_spend_coinbase.py
--- a/test/functional/mempool_spend_coinbase.py
+++ b/test/functional/mempool_spend_coinbase.py
@@ -2,16 +2,15 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test spending coinbase transactions.
-# The coinbase transaction in block N can appear in block
-# N+100... so is valid in the mempool when the best block
-# height is N+99.
-# This test makes sure coinbase spends that will be mature
-# in the next block are accepted into the memory pool,
-# but less mature coinbase spends are NOT.
-#
+"""Test spending coinbase transactions.
+
+The coinbase transaction in block N can appear in block
+N+100... so is valid in the mempool when the best block
+height is N+99.
+This test makes sure coinbase spends that will be mature
+in the next block are accepted into the memory pool,
+but less mature coinbase spends are NOT.
+"""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_raises_rpc_error, create_tx
diff --git a/test/functional/mining_getblocktemplate_longpoll.py b/test/functional/mining_getblocktemplate_longpoll.py
--- a/test/functional/mining_getblocktemplate_longpoll.py
+++ b/test/functional/mining_getblocktemplate_longpoll.py
@@ -2,6 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test longpolling with getblocktemplate."""
 
 from decimal import Decimal
 import threading
diff --git a/test/functional/mining_prioritisetransaction.py b/test/functional/mining_prioritisetransaction.py
--- a/test/functional/mining_prioritisetransaction.py
+++ b/test/functional/mining_prioritisetransaction.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test PrioritiseTransaction code
-#
+"""Test the prioritisetransaction mining RPC."""
 
 import time
 
diff --git a/test/functional/p2p_compactblocks.py b/test/functional/p2p_compactblocks.py
--- a/test/functional/p2p_compactblocks.py
+++ b/test/functional/p2p_compactblocks.py
@@ -3,6 +3,10 @@
 # Copyright (c) 2017 The Bitcoin developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test compact blocks (BIP 152).
+
+Only testing Version 1 compact blocks (txids)
+"""
 
 import random
 
@@ -46,12 +50,6 @@
 from test_framework.txtools import pad_tx
 from test_framework.util import assert_equal, sync_blocks, wait_until
 
-'''
-CompactBlocksTest -- test compact blocks (BIP 152)
-
-Only testing Version 1 compact blocks (txids)
-'''
-
 # TestNode: A peer we use to send messages to bitcoind, and store responses.
 
 
diff --git a/test/functional/p2p_feefilter.py b/test/functional/p2p_feefilter.py
--- a/test/functional/p2p_feefilter.py
+++ b/test/functional/p2p_feefilter.py
@@ -2,7 +2,7 @@
 # Copyright (c) 2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-#
+"""Test processing of feefilter messages."""
 
 from decimal import Decimal
 import time
@@ -16,10 +16,6 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import sync_blocks, sync_mempools
 
-'''
-FeeFilterTest -- test processing of feefilter messages
-'''
-
 
 def hashToHex(hash):
     return format(hash, '064x')
diff --git a/test/functional/p2p_invalid_block.py b/test/functional/p2p_invalid_block.py
--- a/test/functional/p2p_invalid_block.py
+++ b/test/functional/p2p_invalid_block.py
@@ -2,6 +2,14 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test node responses to invalid blocks.
+
+In this test we connect to one node over p2p, and test block requests:
+1) Valid blocks should be requested and become chain tip.
+2) Invalid block with duplicated transaction should be re-requested.
+3) Invalid block with bad coinbase value should be rejected and not
+re-requested.
+"""
 
 import copy
 import time
@@ -18,17 +26,7 @@
 from test_framework.util import assert_equal
 
 
-'''
-In this test we connect to one node over p2p, and test block requests:
-1) Valid blocks should be requested and become chain tip.
-2) Invalid block with duplicated transaction should be re-requested.
-3) Invalid block with bad coinbase value should be rejected and not
-re-requested.
-'''
-
 # Use the ComparisonTestFramework with 1 node: only use --testbinary.
-
-
 class InvalidBlockRequestTest(ComparisonTestFramework):
 
     ''' Can either run this test as 1 node with expected answers, or two and compare them.
diff --git a/test/functional/p2p_invalid_tx.py b/test/functional/p2p_invalid_tx.py
--- a/test/functional/p2p_invalid_tx.py
+++ b/test/functional/p2p_invalid_tx.py
@@ -2,6 +2,10 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test node responses to invalid transactions.
+
+In this test we connect to one node over p2p, and test tx requests.
+"""
 
 import time
 
@@ -16,10 +20,6 @@
 from test_framework.test_framework import ComparisonTestFramework
 
 
-'''
-In this test we connect to one node over p2p, and test tx requests.
-'''
-
 # Use the ComparisonTestFramework with 1 node: only use --testbinary.
 
 
diff --git a/test/functional/p2p_leak.py b/test/functional/p2p_leak.py
--- a/test/functional/p2p_leak.py
+++ b/test/functional/p2p_leak.py
@@ -8,7 +8,8 @@
 received a VERACK.
 
 This test connects to a node and sends it a few messages, trying to intice it
-into sending us something it shouldn't."""
+into sending us something it shouldn't.
+"""
 
 import time
 
diff --git a/test/functional/p2p_mempool.py b/test/functional/p2p_mempool.py
--- a/test/functional/p2p_mempool.py
+++ b/test/functional/p2p_mempool.py
@@ -2,6 +2,11 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test p2p mempool message.
+
+Test that nodes are disconnected if they send mempool messages when bloom
+filters are not enabled.
+"""
 
 from test_framework.messages import msg_mempool
 from test_framework.mininode import network_thread_start, P2PInterface
diff --git a/test/functional/p2p_timeouts.py b/test/functional/p2p_timeouts.py
--- a/test/functional/p2p_timeouts.py
+++ b/test/functional/p2p_timeouts.py
@@ -2,7 +2,7 @@
 # Copyright (c) 2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-""" TimeoutsTest -- test various net timeouts (only in extended tests)
+"""Test various net timeouts.
 
 - Create three bitcoind nodes:
 
diff --git a/test/functional/p2p_unrequested_blocks.py b/test/functional/p2p_unrequested_blocks.py
--- a/test/functional/p2p_unrequested_blocks.py
+++ b/test/functional/p2p_unrequested_blocks.py
@@ -2,37 +2,7 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-import time
-
-from test_framework.blocktools import (
-    create_block,
-    create_coinbase,
-    create_transaction,
-)
-from test_framework.messages import (
-    CBlockHeader,
-    CInv,
-    msg_block,
-    msg_headers,
-    msg_inv,
-)
-from test_framework.mininode import (
-    mininode_lock,
-    network_thread_join,
-    network_thread_start,
-    P2PInterface,
-)
-from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    assert_raises_rpc_error,
-    connect_nodes,
-    sync_blocks,
-)
-
-'''
-AcceptBlockTest -- test processing of unrequested blocks.
+"""Test processing of unrequested blocks.
 
 Setup: two nodes, node0+node1, not connected to each other. Node1 will have
 nMinimumChainWork set to 0x10, so it won't process low-work unrequested blocks.
@@ -79,7 +49,35 @@
 
 9. Test Node1 is able to sync when connected to node0 (which should have sufficient
    work on its chain).
-'''
+"""
+
+import time
+
+from test_framework.blocktools import (
+    create_block,
+    create_coinbase,
+    create_transaction,
+)
+from test_framework.messages import (
+    CBlockHeader,
+    CInv,
+    msg_block,
+    msg_headers,
+    msg_inv,
+)
+from test_framework.mininode import (
+    mininode_lock,
+    network_thread_join,
+    network_thread_start,
+    P2PInterface,
+)
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+    assert_raises_rpc_error,
+    connect_nodes,
+    sync_blocks,
+)
 
 
 class AcceptBlockTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_bind.py b/test/functional/rpc_bind.py
--- a/test/functional/rpc_bind.py
+++ b/test/functional/rpc_bind.py
@@ -2,8 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-# Test for -rpcbind, as well as -rpcallowip and -rpcconnect
+"""Test running bitcoind with the -rpcbind and -rpcallowip options."""
 
 from platform import uname
 import socket
diff --git a/test/functional/rpc_decodescript.py b/test/functional/rpc_decodescript.py
--- a/test/functional/rpc_decodescript.py
+++ b/test/functional/rpc_decodescript.py
@@ -2,6 +2,7 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test decoding scripts via decodescript RPC command."""
 
 from test_framework.messages import CTransaction, FromHex, ToHex
 from test_framework.test_framework import BitcoinTestFramework
@@ -117,7 +118,7 @@
                      public_key + ' OP_CHECKSIG', rpc_result['asm'])
 
     def decoderawtransaction_asm_sighashtype(self):
-        """Tests decoding scripts via RPC command "decoderawtransaction".
+        """Test decoding scripts via RPC command "decoderawtransaction".
 
         This test is in with the "decodescript" tests because they are testing the same "asm" script decodes.
         """
diff --git a/test/functional/rpc_getchaintips.py b/test/functional/rpc_getchaintips.py
--- a/test/functional/rpc_getchaintips.py
+++ b/test/functional/rpc_getchaintips.py
@@ -2,10 +2,13 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test the getchaintips RPC.
 
-# Exercise the getchaintips API.  We introduce a network split, work
-# on chains of different lengths, and join the network together again.
-# This gives us two tips, verify that it works.
+- introduce a network split
+- work on chains of different lengths
+- join the network together again
+- verify that getchaintips now returns two chain tips.
+"""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
diff --git a/test/functional/rpc_invalidateblock.py b/test/functional/rpc_invalidateblock.py
--- a/test/functional/rpc_invalidateblock.py
+++ b/test/functional/rpc_invalidateblock.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test InvalidateBlock code
-#
+"""Test the invalidateblock RPC."""
 
 import time
 
diff --git a/test/functional/rpc_listtransactions.py b/test/functional/rpc_listtransactions.py
--- a/test/functional/rpc_listtransactions.py
+++ b/test/functional/rpc_listtransactions.py
@@ -2,8 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-# Exercise the listtransactions API
+"""Test the listtransactions API."""
 
 from decimal import Decimal
 
diff --git a/test/functional/rpc_named_arguments.py b/test/functional/rpc_named_arguments.py
--- a/test/functional/rpc_named_arguments.py
+++ b/test/functional/rpc_named_arguments.py
@@ -2,6 +2,7 @@
 # Copyright (c) 2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test using named arguments for RPCs."""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_raises_rpc_error
diff --git a/test/functional/rpc_preciousblock.py b/test/functional/rpc_preciousblock.py
--- a/test/functional/rpc_preciousblock.py
+++ b/test/functional/rpc_preciousblock.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test PreciousBlock code
-#
+"""Test the preciousblock RPC."""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
diff --git a/test/functional/rpc_rawtransaction.py b/test/functional/rpc_rawtransaction.py
--- a/test/functional/rpc_rawtransaction.py
+++ b/test/functional/rpc_rawtransaction.py
@@ -2,15 +2,16 @@
 # Copyright (c) 2014-2017 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-"""rawtranscation RPCs QA test.
-
-# Tests the following RPCs:
-#    - createrawtransaction
-#    - signrawtransactionwithwallet
-#    - sendrawtransaction
-#    - decoderawtransaction
-#    - getrawtransaction
+"""Test the rawtranscation RPCs.
+
+Test the following RPCs:
+   - createrawtransaction
+   - signrawtransactionwithwallet
+   - sendrawtransaction
+   - decoderawtransaction
+   - getrawtransaction
 """
+
 from decimal import Decimal
 
 from collections import OrderedDict
diff --git a/test/functional/rpc_signmessage.py b/test/functional/rpc_signmessage.py
--- a/test/functional/rpc_signmessage.py
+++ b/test/functional/rpc_signmessage.py
@@ -2,6 +2,7 @@
 # Copyright (c) 2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test RPC commands for signing and verifying messages."""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
diff --git a/test/functional/rpc_txoutproof.py b/test/functional/rpc_txoutproof.py
--- a/test/functional/rpc_txoutproof.py
+++ b/test/functional/rpc_txoutproof.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test merkleblock fetch/validation
-#
+"""Test gettxoutproof and verifytxoutproof RPCs."""
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
diff --git a/test/functional/rpc_users.py b/test/functional/rpc_users.py
--- a/test/functional/rpc_users.py
+++ b/test/functional/rpc_users.py
@@ -2,10 +2,7 @@
 # Copyright (c) 2015-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#
-# Test multiple rpc user config option rpcauth
-#
+"""Test multiple RPC users."""
 
 import http.client
 import os
diff --git a/test/functional/wallet_import_rescan.py b/test/functional/wallet_import_rescan.py
--- a/test/functional/wallet_import_rescan.py
+++ b/test/functional/wallet_import_rescan.py
@@ -2,7 +2,8 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-'''
+"""Test wallet import RPCs.
+
 Test rescan behavior of importaddress, importpubkey, importprivkey, and
 importmulti RPCs with different types of keys and rescan options.
 
@@ -16,7 +17,7 @@
 test makes more listtransactions and getbalance calls to confirm that the
 importing nodes pick up the new transactions regardless of whether rescans
 happened previously.
-'''
+"""
 
 import collections
 import enum
diff --git a/test/functional/wallet_importmulti.py b/test/functional/wallet_importmulti.py
--- a/test/functional/wallet_importmulti.py
+++ b/test/functional/wallet_importmulti.py
@@ -2,7 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
+"""Test the importmulti RPC."""
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
diff --git a/test/functional/wallet_importprunedfunds.py b/test/functional/wallet_importprunedfunds.py
--- a/test/functional/wallet_importprunedfunds.py
+++ b/test/functional/wallet_importprunedfunds.py
@@ -2,6 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test the importprunedfunds and removeprunedfunds RPCs."""
 
 from decimal import Decimal
 
diff --git a/test/functional/wallet_keypool.py b/test/functional/wallet_keypool.py
--- a/test/functional/wallet_keypool.py
+++ b/test/functional/wallet_keypool.py
@@ -2,8 +2,7 @@
 # Copyright (c) 2014-2016 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-# Exercise the wallet keypool, and interaction with wallet encryption/locking
+"""Test the wallet keypool and interaction with wallet encryption/locking."""
 import time
 
 from test_framework.test_framework import BitcoinTestFramework
diff --git a/test/functional/wallet_listreceivedby.py b/test/functional/wallet_listreceivedby.py
--- a/test/functional/wallet_listreceivedby.py
+++ b/test/functional/wallet_listreceivedby.py
@@ -2,8 +2,8 @@
 # Copyright (c) 2014-2017 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
 """Test the listreceivedbyaddress RPC."""
+
 from decimal import Decimal
 
 from test_framework.test_framework import BitcoinTestFramework
diff --git a/test/functional/wallet_listsinceblock.py b/test/functional/wallet_listsinceblock.py
--- a/test/functional/wallet_listsinceblock.py
+++ b/test/functional/wallet_listsinceblock.py
@@ -2,7 +2,7 @@
 # Copyright (c) 2017 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
+"""Test the listsincelast RPC."""
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_array_result, assert_raises_rpc_error