diff --git a/test/functional/rpcbind_test.py b/test/functional/rpcbind_test.py
--- a/test/functional/rpcbind_test.py
+++ b/test/functional/rpcbind_test.py
@@ -47,8 +47,8 @@
         self.nodes[0].rpchost = None
         self.start_nodes([base_args])
         # connect to node through non-loopback interface
-        node = get_rpc_proxy(rpc_url(get_datadir_path(self.options.tmpdir, 0), 0, "%s:%d" % (
-            rpchost, rpcport)), 0, coveragedir=self.options.coveragedir)
+        node = get_rpc_proxy(rpc_url(get_datadir_path(
+            self.options.tmpdir, 0), 0, rpchost, rpcport), 0, coveragedir=self.options.coveragedir)
         node.getnetworkinfo()
         self.stop_nodes()
 
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -97,7 +97,7 @@
             assert self.process.poll(
             ) is None, "bitcoind exited with status %i during initialization" % self.process.returncode
             try:
-                self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.host),
+                self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.host, self.rpc_port),
                                          self.index, timeout=self.rpc_timeout, coveragedir=self.coverage_dir)
                 self.rpc.getblockcount()
                 # If the call to getblockcount() succeeds then the RPC connection is up
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -310,17 +310,12 @@
     return PORT_MIN + PORT_RANGE + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)
 
 
-def rpc_url(datadir, i, rpchost=None):
+def rpc_url(datadir, i, rpchost, rpcport):
     rpc_u, rpc_p = get_auth_cookie(datadir)
     host = '127.0.0.1'
-    port = rpc_port(i)
     if rpchost:
-        parts = rpchost.split(':')
-        if len(parts) == 2:
-            host, port = parts
-        else:
-            host = rpchost
-    return "http://%s:%s@%s:%d" % (rpc_u, rpc_p, host, int(port))
+        host = rpchost
+    return "http://%s:%s@%s:%d" % (rpc_u, rpc_p, host, int(rpcport))
 
 # Node functions
 ################