yanglint TEST option make-implemented
diff --git a/tools/lint/tests/interactive/clear.test b/tools/lint/tests/interactive/clear.test
index 5a247c9..56481c5 100644
--- a/tools/lint/tests/interactive/clear.test
+++ b/tools/lint/tests/interactive/clear.test
@@ -1,5 +1,21 @@
 source [expr {[info exists ::env(TESTS_DIR)] ? "$env(TESTS_DIR)/interactive/ly.tcl" : "ly.tcl"}]
 
+set mdir $::env(YANG_MODULES_DIR)
+
+test clear_make_implemented_once {clear --make-implemented} {
+-setup $ly_setup -cleanup $ly_cleanup -body {
+    ly_cmd "clear -i"
+    ly_cmd "add $mdir/modmust.yang"
+    ly_cmd "list" "I modmust\r.*I modleaf"
+}}
+
+test clear_make_implemented_twice {clear -i -i} {
+-setup $ly_setup -cleanup $ly_cleanup -body {
+    ly_cmd "clear -i -i"
+    ly_cmd "add $mdir/modmust.yang"
+    ly_cmd "list" "I modmust\r.*I modleaf"
+}}
+
 test clear_ietf_yang_library {clear --yang-library} {
 -setup $ly_setup -cleanup $ly_cleanup -body {
     # add models