diff --git a/mt76.h b/mt76.h
index 6eb77046..841f46c4 100644
--- a/mt76.h
+++ b/mt76.h
@@ -529,6 +529,7 @@ struct mt76_testmode_data {
 	u8 tx_rate_sgi;
 	u8 tx_rate_ldpc;
 	u8 tx_rate_stbc;
+	u8 tx_ltf;
 
 	u8 tx_antenna_mask;
 
diff --git a/testmode.c b/testmode.c
index 6b59e083..f37a4603 100644
--- a/testmode.c
+++ b/testmode.c
@@ -12,6 +12,7 @@ static const struct nla_policy mt76_tm_policy[NUM_MT76_TM_ATTRS] = {
 	[MT76_TM_ATTR_TX_RATE_SGI] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_RATE_LDPC] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_RATE_STBC] = { .type = NLA_U8 },
+	[MT76_TM_ATTR_TX_LTF] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_ANTENNA] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_POWER_CONTROL] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_POWER] = { .type = NLA_NESTED },
@@ -338,9 +339,10 @@ int mt76_testmode_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			   0, MT76_TM_TX_MODE_MAX) ||
 	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_RATE_NSS], &td->tx_rate_nss,
 			   1, hweight8(phy->antenna_mask)) ||
-	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_RATE_SGI], &td->tx_rate_sgi, 0, 1) ||
+	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_RATE_SGI], &td->tx_rate_sgi, 0, 2) ||
 	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_RATE_LDPC], &td->tx_rate_ldpc, 0, 1) ||
 	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_RATE_STBC], &td->tx_rate_stbc, 0, 1) ||
+	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_LTF], &td->tx_ltf, 0, 2) ||
 	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_ANTENNA], &td->tx_antenna_mask, 1,
 			   phy->antenna_mask) ||
 	    mt76_tm_get_u8(tb[MT76_TM_ATTR_TX_POWER_CONTROL],
@@ -478,6 +480,8 @@ int mt76_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *msg,
 	    nla_put_u8(msg, MT76_TM_ATTR_TX_RATE_SGI, td->tx_rate_sgi) ||
 	    nla_put_u8(msg, MT76_TM_ATTR_TX_RATE_LDPC, td->tx_rate_ldpc) ||
 	    nla_put_u8(msg, MT76_TM_ATTR_TX_RATE_STBC, td->tx_rate_stbc) ||
+	    (mt76_testmode_param_present(td, MT76_TM_ATTR_TX_LTF) &&
+	     nla_put_u8(msg, MT76_TM_ATTR_TX_LTF, td->tx_ltf)) ||
 	    (mt76_testmode_param_present(td, MT76_TM_ATTR_TX_ANTENNA) &&
 	     nla_put_u8(msg, MT76_TM_ATTR_TX_ANTENNA, td->tx_antenna_mask)) ||
 	    (mt76_testmode_param_present(td, MT76_TM_ATTR_TX_POWER_CONTROL) &&
diff --git a/testmode.h b/testmode.h
index 00c16590..3c09aa55 100644
--- a/testmode.h
+++ b/testmode.h
@@ -26,6 +26,7 @@
  * @MT76_TM_ATTR_TX_RATE_SGI: packet tx use short guard interval (u8)
  * @MT76_TM_ATTR_TX_RATE_LDPC: packet tx enable LDPC (u8)
  * @MT76_TM_ATTR_TX_RATE_STBC: packet tx enable STBC (u8)
+ * @MT76_TM_ATTR_TX_LTF: packet tx LTF, set 0 to 2 for 1x, 2x, and 4x LTF (u8)
  *
  * @MT76_TM_ATTR_TX_ANTENNA: tx antenna mask (u8)
  * @MT76_TM_ATTR_TX_POWER_CONTROL: enable tx power control (u8)
@@ -52,6 +53,7 @@ enum mt76_testmode_attr {
 	MT76_TM_ATTR_TX_RATE_SGI,
 	MT76_TM_ATTR_TX_RATE_LDPC,
 	MT76_TM_ATTR_TX_RATE_STBC,
+	MT76_TM_ATTR_TX_LTF,
 
 	MT76_TM_ATTR_TX_ANTENNA,
 	MT76_TM_ATTR_TX_POWER_CONTROL,
diff --git a/tools/fields.c b/tools/fields.c
index 8483cbac..817d797d 100644
--- a/tools/fields.c
+++ b/tools/fields.c
@@ -295,6 +295,7 @@ static const struct tm_field testdata_fields[NUM_MT76_TM_ATTRS] = {
 	FIELD(u8, TX_RATE_SGI, "tx_rate_sgi"),
 	FIELD(u8, TX_RATE_LDPC, "tx_rate_ldpc"),
 	FIELD(u8, TX_RATE_STBC, "tx_rate_stbc"),
+	FIELD(u8, TX_LTF, "tx_ltf"),
 	FIELD(u8, TX_POWER_CONTROL, "tx_power_control"),
 	FIELD_ARRAY(u8, TX_POWER, "tx_power"),
 	FIELD(u8, TX_ANTENNA, "tx_antenna"),
@@ -316,6 +317,7 @@ static struct nla_policy testdata_policy[NUM_MT76_TM_ATTRS] = {
 	[MT76_TM_ATTR_TX_RATE_SGI] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_RATE_LDPC] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_RATE_STBC] = { .type = NLA_U8 },
+	[MT76_TM_ATTR_TX_LTF] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_POWER_CONTROL] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_TX_ANTENNA] = { .type = NLA_U8 },
 	[MT76_TM_ATTR_FREQ_OFFSET] = { .type = NLA_U32 },