[qa] Remove hardcoded "4 nodes" from test_framework

1 files changed, 5 insertions, 4 deletions

diff --git a/qa/rpc-tests/signmessages.py b/qa/rpc-tests/signmessages.py
index 4a47c0ca1e..31b6f14a26 100755
--- a/qa/rpc-tests/signmessages.py
+++ b/qa/rpc-tests/signmessages.py
@@ -10,12 +10,13 @@ from test_framework.util import *
 class SignMessagesTest(BitcoinTestFramework):
     """Tests RPC commands for signing and verifying messages."""
 
-    def setup_chain(self):
-        print('Initializing test directory ' + self.options.tmpdir)
-        initialize_chain_clean(self.options.tmpdir, 1)
+    def __init__(self):
+        super().__init__()
+        self.setup_clean_chain = True
+        self.num_nodes = 1
 
     def setup_network(self, split=False):
-        self.nodes = start_nodes(1, self.options.tmpdir)
+        self.nodes = start_nodes(self.num_nodes, self.options.tmpdir)
         self.is_network_split = False
 
     def run_test(self):