diff --git a/test/lib.sh b/test/lib.sh
index 5432a4e6..afca104b 100755
--- a/test/lib.sh
+++ b/test/lib.sh
@@ -549,7 +549,7 @@ function expectpart(){
   fi
   # Loop over all variable args expect strings (skip first two args)
   # note that "expect" var is never actually used
-  # Then test positive for strings, if the token --neg-- is detected, then test negative for the rest
+  # Then test positive for strings, if the token --not-- is detected, then test negative for the rest
   positive=true;
   let i=0;
   for exp in "$@"; do
diff --git a/test/test_cli_duplicates.sh b/test/test_cli_duplicates.sh
new file mode 100755
index 00000000..279532ed
--- /dev/null
+++ b/test/test_cli_duplicates.sh
@@ -0,0 +1,184 @@
+#!/usr/bin/env bash
+# Test of duplicates in autocli expansion. 
+# Regression of issues:
+#  keys: https://github.com/clicon/clixon/issues/301
+#  reftree: https://github.com/clicon/cligen/issues/73
+# Duplicates can happen in expansion in autocli of unions and treerefs(@) where the same
+# command occurs multiple times, ie "merging" does not work in some cases
+# An effect is also that next level expansion does not work, ie "after" the command
+
+# Magic line must be first in script (see README.md)
+s="$_" ; . ./lib.sh || if [ "$s" = $0 ]; then exit 0; else return 0; fi
+
+APPNAME=example
+
+# include err() and new() functions and creates $dir
+
+cfg=$dir/conf_yang.xml
+fcli=$dir/example.cli
+fcli2=$dir/extra.cli
+fyang=$dir/example.yang
+
+cat <<EOF > $fyang
+module example {
+    yang-version 1.1;
+    namespace "urn:example:clixon";
+    prefix ex;
+    typedef uniontype {
+        type union {
+	    type enumeration {
+                enum u1;
+                enum u2;
+            }
+	    type string;
+        }
+    }
+    /* Generic config data */
+    container tableleaf{
+	list parleaf{
+	    description "leaf is union type";
+	    key name;
+	    leaf name{
+		type string;
+	    }
+	    leaf value{
+		type uniontype;
+	    }
+	}
+    }
+    container tablekey{
+	list parkey{
+	    description "key is union type";
+	    key name;
+	    leaf name{
+		type uniontype;
+	    }
+	    leaf value{
+		type string;
+	    }
+	}
+    }
+}
+EOF
+
+AUTOCLI=$(autocli_config example kw-nokey false)
+
+# Use yang in example
+cat <<EOF > $cfg
+<clixon-config xmlns="http://clicon.org/config">
+  <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
+  <CLICON_YANG_DIR>${YANG_INSTALLDIR}</CLICON_YANG_DIR>
+  <CLICON_YANG_DIR>$IETFRFC</CLICON_YANG_DIR>
+  <CLICON_YANG_MAIN_DIR>$dir</CLICON_YANG_MAIN_DIR>
+  <CLICON_BACKEND_DIR>/usr/local/lib/$APPNAME/backend</CLICON_BACKEND_DIR>
+  <CLICON_CLI_MODE>$APPNAME</CLICON_CLI_MODE>
+  <CLICON_CLI_DIR>/usr/local/lib/$APPNAME/cli</CLICON_CLI_DIR>
+  <CLICON_CLISPEC_DIR>$dir</CLICON_CLISPEC_DIR>
+  <CLICON_SOCK>/usr/local/var/$APPNAME/$APPNAME.sock</CLICON_SOCK>
+  <CLICON_BACKEND_PIDFILE>/usr/local/var/$APPNAME/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
+  <CLICON_XMLDB_DIR>$dir</CLICON_XMLDB_DIR>
+  <CLICON_XMLDB_PRETTY>false</CLICON_XMLDB_PRETTY>
+  ${AUTOCLI}
+</clixon-config>
+EOF
+
+cat <<EOF > $fcli
+CLICON_MODE="example";
+CLICON_PROMPT="%U@%H %W> ";
+CLICON_PLUGIN="example_cli";
+
+# Autocli syntax tree operations
+set @datamodel, cli_auto_set();
+validate("Validate changes"), cli_validate();
+commit("Commit the changes"), cli_commit();
+quit("Quit"), cli_quit();
+show("Show a particular state of the system")
+    configuration("Show configuration"), cli_auto_show("datamodel", "candidate", "text", true, false);
+@extra;
+EOF
+
+# Extra clispec included in the example clispec
+# Need "extra" command between the two "show" commands to trigger the duplication
+cat <<EOF > $fcli2
+CLICON_MODE="extra";
+CLICON_PROMPT="%U@%H %W> ";
+CLICON_PLUGIN="example_cli";
+
+extracmd;
+show("Show a particular state of the system"){
+   extrasub;
+}
+EOF
+
+new "test params: -f $cfg"
+if [ $BE -ne 0 ]; then
+    new "kill old backend"
+    sudo clixon_backend -z -f $cfg
+    if [ $? -ne 0 ]; then
+	err
+    fi
+    new "start backend -s init -f $cfg"
+    start_backend -s init -f $cfg
+fi
+
+new "wait backend"
+wait_backend
+
+# include treeref
+new "cli include tree - basic"
+expectpart "$(echo "?" | $clixon_cli -f $cfg 2>/dev/null)" 0 show extracmd
+
+new "cli include tree - count"
+ret=$(echo "?" | $clixon_cli -f $cfg 2>&1 2>/dev/null)
+count=$(echo "$ret" | grep -c show)
+if [ $count -gt 1 ]; then
+    err "number of show: 1" $count
+fi
+
+# query of treeref?
+new "cli include tree - subtrees"
+expectpart "$(echo "show ?" | $clixon_cli -f $cfg 2>/dev/null)" 0 show configuration extrasub
+
+#-------------------------------
+# list expansion leaf and key
+new "cli query leaf union - basic"
+expectpart "$(echo "set tableleaf parleaf a value ?" | $clixon_cli -f $cfg 2>/dev/null)" 0 u1 u2
+
+new "cli query leaf union - count"
+ret=$(echo "set tableleaf parleaf a value ?" | $clixon_cli -f $cfg 2>&1 2>/dev/null)
+count=$(echo "$ret" | grep -c u1)
+if [ $count -gt 1 ]; then
+    err "number of u1: 1" $count
+fi
+
+new "cli set key union"
+expectpart "$($clixon_cli -1 -f $cfg set tablekey parkey u1 value 42)" 0 "^$"
+
+new "cli query key union - basic"
+expectpart "$(echo "set tablekey parkey ?" | $clixon_cli -f $cfg 2>/dev/null)" 0 u1 u2
+
+new "cli query leaf union - count"
+ret=$(echo "set tablekey parkey ?" | $clixon_cli -f $cfg 2>&1 2>/dev/null)
+count=$(echo "$ret" | grep -c u1)
+if [ $count -gt 1 ]; then
+    err "number of u1: 1" $count
+fi
+
+if [ $BE -ne 0 ]; then
+    new "Kill backend"
+    # Check if premature kill
+    pid=$(pgrep -u root -f clixon_backend)
+    if [ -z "$pid" ]; then
+	err "backend already dead"
+    fi
+    # kill backend
+    stop_backend -f $cfg
+fi
+
+rm -rf $dir
+
+unset count
+unset ret
+
+new "endtest"
+endtest