diff --git a/openbsc/tests/ctrl_test_runner.py b/openbsc/tests/ctrl_test_runner.py
index 24732e0..dfdec40 100644
--- a/openbsc/tests/ctrl_test_runner.py
+++ b/openbsc/tests/ctrl_test_runner.py
@@ -159,6 +159,10 @@
         self.assertEquals(r['mtype'], 'ERROR')
         self.assertEquals(r['error'], 'Command not found')
 
+        r = self.do_set('rf_locked', '999')
+        self.assertEquals(r['mtype'], 'ERROR')
+        self.assertEquals(r['error'], 'Value failed verification.')
+
         r = self.do_get('bts')
         self.assertEquals(r['mtype'], 'ERROR')
         self.assertEquals(r['error'], 'Error while parsing the index.')