diff --git a/mmgen/baseconv.py b/mmgen/baseconv.py
index 19f44e6a..da1bf323 100755
--- a/mmgen/baseconv.py
+++ b/mmgen/baseconv.py
@@ -102,6 +102,7 @@ class baseconv(object):
 		for k,v in list(cls.wl_chksums.items()):
 			res = cls.get_wordlist_chksum(k)
 			assert res == v,'{}: checksum mismatch for {} (should be {})'.format(res,k,v)
+		return True
 
 	@classmethod
 	def check_wordlist(cls,wl_id):
@@ -109,13 +110,16 @@ class baseconv(object):
 
 		wl = cls.digits[wl_id]
 		from mmgen.util import qmsg,compare_chksums
-		qmsg('Wordlist: {}\nLength: {} words'.format(wl_id,len(wl)))
+		ret = 'Wordlist: {}\nLength: {} words'.format(wl_id,len(wl))
 		new_chksum = cls.get_wordlist_chksum(wl_id)
 
 		a,b = 'generated','saved'
 		compare_chksums(new_chksum,a,cls.wl_chksums[wl_id],b,die_on_fail=True)
 
-		qmsg('List is sorted') if tuple(sorted(wl)) == wl else die(3,'ERROR: List is not sorted!')
+		if tuple(sorted(wl)) == wl:
+			return ret + '\nList is sorted'
+		else:
+			die(3,'ERROR: List is not sorted!')
 
 	@classmethod
 	def get_pad(cls,pad,seed_pad_func):
diff --git a/mmgen/protocol.py b/mmgen/protocol.py
index 6130a01e..b36c42d7 100755
--- a/mmgen/protocol.py
+++ b/mmgen/protocol.py
@@ -464,12 +464,13 @@ class CoinProtocol(MMGenObject):
 		coin = coin.lower()
 		assert type(testnet) == bool
 		m = "{}: not a valid coin for network {}\nSupported coins: {}"
-		assert coin in cls.coins, m.format(coin.upper(),g.network.upper(),cls.list_coins())
-		return cls.coins[coin][testnet]
+		assert coin in cls.coins, m.format(coin.upper(),g.network.upper(),' '.join(cls.list_coins()))
+		proto = cls.coins[coin][testnet]
+		return proto
 
 	@classmethod
 	def list_coins(cls):
-		return ' '.join(c.upper() for c in cls.coins)
+		return [c.upper() for c in cls.coins]
 
 	@classmethod
 	def get_base_coin_from_name(cls,name):
@@ -557,6 +558,8 @@ def make_init_genonly_altcoins_str(data):
 def init_coin(coin,testnet=None):
 	if testnet is not None:
 		g.testnet = testnet
+	g.network = ('mainnet','testnet')[g.testnet]
 	coin = coin.upper()
 	g.coin = coin
 	g.proto = CoinProtocol(coin,g.testnet)
+	return g.proto
diff --git a/mmgen/tool.py b/mmgen/tool.py
index d9a37349..c6b7b548 100755
--- a/mmgen/tool.py
+++ b/mmgen/tool.py
@@ -527,7 +527,6 @@ class MMGenToolCmdMnemonic(MMGenToolCmdBase):
 
 	def hex2mn( self, hexstr:'sstr', fmt:mn_opts_disp = dfl_mnemonic_fmt ):
 		"convert a 16, 24 or 32-byte hexadecimal number to a mnemonic seed phrase"
-		opt.out_fmt = self._get_mnemonic_fmt(fmt)
 		if fmt == 'bip39':
 			from mmgen.bip39 import bip39
 			return ' '.join(bip39.fromhex(hexstr,fmt))
@@ -539,7 +538,6 @@ class MMGenToolCmdMnemonic(MMGenToolCmdBase):
 
 	def mn2hex( self, seed_mnemonic:'sstr', fmt:mn_opts_disp = dfl_mnemonic_fmt ):
 		"convert a 12, 18 or 24-word mnemonic seed phrase to a hexadecimal number"
-		in_fmt = self._get_mnemonic_fmt(fmt)
 		if fmt == 'bip39':
 			from mmgen.bip39 import bip39
 			return bip39.tohex(seed_mnemonic.split(),fmt)
@@ -549,8 +547,7 @@ class MMGenToolCmdMnemonic(MMGenToolCmdBase):
 	def mn_stats(self, fmt:mn_opts_disp = dfl_mnemonic_fmt ):
 		"show stats for mnemonic wordlist"
 		conv_cls = mnemonic_fmts[fmt]['conv_cls']()
-		conv_cls.check_wordlist(fmt)
-		return True
+		return conv_cls.check_wordlist(fmt)
 
 	def mn_printlist( self, fmt:mn_opts_disp = dfl_mnemonic_fmt, enum=False, pager=False ):
 		"print mnemonic wordlist"
@@ -896,12 +893,12 @@ class MMGenToolCmdRPC(MMGenToolCmdBase):
 class MMGenToolCmdMonero(MMGenToolCmdBase):
 	"Monero wallet utilities"
 
-	_chain_height = None
+	_monero_chain_height = None
 	monerod_args = []
 
 	@property
-	def chain_height(self):
-		if self._chain_height == None:
+	def monero_chain_height(self):
+		if self._monero_chain_height == None:
 			from mmgen.daemon import CoinDaemon
 			port = CoinDaemon('xmr',test_suite=g.test_suite).rpc_port
 			cmd = ['monerod','--rpc-bind-port={}'.format(port)] + self.monerod_args + ['status']
@@ -912,10 +909,10 @@ class MMGenToolCmdMonero(MMGenToolCmdBase):
 			m = re.search(r'Height: (\d+)/\d+ ',cp.stdout.decode())
 			if not m:
 				die(1,'Unable to connect to monerod!')
-			self._chain_height = int(m.group(1))
-			msg('Chain height: {}'.format(self._chain_height))
+			self._monero_chain_height = int(m.group(1))
+			msg('Chain height: {}'.format(self._monero_chain_height))
 
-		return self._chain_height
+		return self._monero_chain_height
 
 	def keyaddrlist2monerowallets(  self,
 									xmr_keyaddrfile:str,
@@ -962,7 +959,7 @@ class MMGenToolCmdMonero(MMGenToolCmdBase):
 				ymsg("Wallet '{}' does not exist!".format(fn))
 				return False
 
-			chain_height = self.chain_height
+			chain_height = self.monero_chain_height
 			gmsg(m)
 
 			import time
diff --git a/test/test-release.sh b/test/test-release.sh
index b70db5cf..af8e084b 100755
--- a/test/test-release.sh
+++ b/test/test-release.sh
@@ -305,14 +305,17 @@ t_alts="
 
 f_alts='Gen-only altcoin tests completed'
 
-[ "$NO_TMPFILE_REMOVAL" ] || rm -rf /tmp/mmgen-test-release*
-
-if [ "$MSYS2" ]; then
-	TMPDIR='/tmp/mmgen-test-release'
+if [ "$NO_TMPFILE_REMOVAL" ]; then
+	TMPDIR=$(echo /tmp/mmgen-test-release*)
 else
-	TMPDIR='/tmp/mmgen-test-release-'$(cat /dev/urandom | base32 - | head -n1 | cut -b 1-16)
+	rm -rf /tmp/mmgen-test-release*
+	if [ "$MSYS2" ]; then
+		TMPDIR='/tmp/mmgen-test-release'
+	else
+		TMPDIR='/tmp/mmgen-test-release-'$(cat /dev/urandom | base32 - | head -n1 | cut -b 1-16)
+	fi
+	mkdir -p $TMPDIR
 fi
-mkdir -p $TMPDIR
 
 i_xmr='Monero'
 s_xmr='Testing key-address file generation and wallet creation and sync operations for Monero'
@@ -439,6 +442,11 @@ f_ltc_rt='Regtest (Bob and Alice) mode tests for LTC completed'
 i_tool2='Tooltest2'
 s_tool2="The following tests will run '$tooltest2_py' for all supported coins"
 t_tool2="
+	$tooltest2_py --tool-api # test the tool_api subsystem
+	$tooltest2_py --tool-api --testnet=1
+	$tooltest2_py --tool-api --coin=eth
+	$tooltest2_py --tool-api --coin=xmr
+	$tooltest2_py --tool-api --coin=zec
 	$tooltest2_py --fork # run once with --fork so commands are actually executed
 	$tooltest2_py
 	$tooltest2_py --testnet=1