diff --git a/src/test/rpc_tests.cpp b/src/test/rpc_tests.cpp
index 21ccbe96484..23e666bc454 100644
--- a/src/test/rpc_tests.cpp
+++ b/src/test/rpc_tests.cpp
@@ -89,6 +89,9 @@ BOOST_AUTO_TEST_CASE(rpc_namedparams)
     // Make sure named arguments are transformed into positional arguments in correct places separated by nulls
     BOOST_CHECK_EQUAL(TransformParams(JSON(R"({"arg2": 2, "arg4": 4})"), arg_names).write(), "[null,2,null,4]");
 
+    // Make sure later named argument value silently overwrites earlier values
+    BOOST_CHECK_EQUAL(TransformParams(JSON(R"({"arg2": 2, "arg2": 4})"), arg_names).write(), "[null,4]");
+
     // Make sure named and positional arguments can be combined.
     BOOST_CHECK_EQUAL(TransformParams(JSON(R"({"arg5": 5, "args": [1, 2], "arg4": 4})"), arg_names).write(), "[1,2,null,4,5]");
 
diff --git a/test/functional/interface_bitcoin_cli.py b/test/functional/interface_bitcoin_cli.py
index b1369c2615c..afba8dba85b 100755
--- a/test/functional/interface_bitcoin_cli.py
+++ b/test/functional/interface_bitcoin_cli.py
@@ -90,6 +90,10 @@ class TestBitcoinCli(BitcoinTestFramework):
         assert_raises_rpc_error(-8, "Parameter arg1 specified twice both as positional and named argument", self.nodes[0].cli.echo, 0, 1, arg1=1)
         assert_raises_rpc_error(-8, "Parameter arg1 specified twice both as positional and named argument", self.nodes[0].cli.echo, 0, None, 2, arg1=1)
 
+        self.log.info("Test that later cli named arguments values silently overwrite earlier ones")
+        assert_equal(self.nodes[0].cli("-named", "echo", "arg0=0", "arg1=1", "arg2=2", "arg1=3").send_cli(), ['0', '3', '2'])
+        assert_equal(self.nodes[0].cli("-named", "echo", "args=[0,1,2,3]", "4", "5", "6", ).send_cli(), ['4', '5', '6'])
+
         user, password = get_auth_cookie(self.nodes[0].datadir, self.chain)
 
         self.log.info("Test -stdinrpcpass option")