diff --git a/tests/hwsim/test_hapd_ctrl.py b/tests/hwsim/test_hapd_ctrl.py
index e45eca041..8e910827d 100644
--- a/tests/hwsim/test_hapd_ctrl.py
+++ b/tests/hwsim/test_hapd_ctrl.py
@@ -354,9 +354,9 @@ def test_hapd_ctrl_set_error_cases(dev, apdev):
                "beacon_int 65536",
                "acs_num_scans 0",
                "acs_num_scans 101",
-               "rts_threshold -1",
-               "rts_threshold 2348",
-               "fragm_threshold -1",
+               "rts_threshold -2",
+               "rts_threshold 65536",
+               "fragm_threshold -2",
                "fragm_threshold 2347",
                "send_probe_response -1",
                "send_probe_response 2",