diff --git a/tests/hwsim/test_fst_module.py b/tests/hwsim/test_fst_module.py
index 79617e222..47f824d31 100644
--- a/tests/hwsim/test_fst_module.py
+++ b/tests/hwsim/test_fst_module.py
@@ -1839,6 +1839,18 @@ def test_fst_proto(dev, apdev, test_params):
                                      FST_ACTION_SETUP_REQUEST)
         hostapd_tx_and_status(hapd, msg)
 
+        # FST Request dropped: invalid STIE (EID)
+        msg['payload'] = struct.pack("<BBBLBBLBBBBBBB", ACTION_CATEG_FST,
+                                     FST_ACTION_SETUP_REQUEST, 0, 0,
+                                     163, 11, 0, 0, 0, 0, 0, 0, 0, 0)
+        hostapd_tx_and_status(hapd, msg)
+
+        # FST Request dropped: invalid STIE (Len)
+        msg['payload'] = struct.pack("<BBBLBBLBBBBBBB", ACTION_CATEG_FST,
+                                     FST_ACTION_SETUP_REQUEST, 0, 0,
+                                     164, 10, 0, 0, 0, 0, 0, 0, 0, 0)
+        hostapd_tx_and_status(hapd, msg)
+
         # FST Request dropped: new and old band IDs are the same
         msg['payload'] = struct.pack("<BBBLBBLBBBBBBB", ACTION_CATEG_FST,
                                      FST_ACTION_SETUP_REQUEST, 0, 0,
@@ -1969,6 +1981,26 @@ def test_fst_setup_response_proto(dev, apdev, test_params):
                                      FST_ACTION_SETUP_RESPONSE)
         hostapd_tx_and_status(hapd, msg)
 
+        # FST Response dropped: invalid STIE (EID)
+        dialog_token = 1
+        status_code = 0
+        id = 0
+        msg['payload'] = struct.pack("<BBBBBBLBBBBBBB", ACTION_CATEG_FST,
+                                     FST_ACTION_SETUP_RESPONSE, dialog_token,
+                                     status_code,
+                                     163, 11, 0, 0, id, 0, 0, 0, 0, 0)
+        hostapd_tx_and_status(hapd, msg)
+
+        # FST Response dropped: invalid STIE (Len)
+        dialog_token = 1
+        status_code = 0
+        id = 0
+        msg['payload'] = struct.pack("<BBBBBBLBBBBBBB", ACTION_CATEG_FST,
+                                     FST_ACTION_SETUP_RESPONSE, dialog_token,
+                                     status_code,
+                                     164, 10, 0, 0, id, 0, 0, 0, 0, 0)
+        hostapd_tx_and_status(hapd, msg)
+
         # FST Response dropped due to wrong dialog token
         dialog_token = 123
         status_code = 0