diff --git a/drivers/ethernet/eth_sam_gmac.c b/drivers/ethernet/eth_sam_gmac.c
index cd22d28885f..6b02d223788 100644
--- a/drivers/ethernet/eth_sam_gmac.c
+++ b/drivers/ethernet/eth_sam_gmac.c
@@ -1120,7 +1120,7 @@ static struct net_pkt *frame_get(struct gmac_queue *queue)
 		return NULL;
 	}
 
-	rx_frame = net_pkt_get_reserve_rx(K_NO_WAIT);
+	rx_frame = net_pkt_rx_alloc(K_NO_WAIT);
 
 	/* Process a frame */
 	tail = rx_desc_list->tail;
diff --git a/drivers/ieee802154/ieee802154_uart_pipe.c b/drivers/ieee802154/ieee802154_uart_pipe.c
index 3e40a0314c5..4a48aca0969 100644
--- a/drivers/ieee802154/ieee802154_uart_pipe.c
+++ b/drivers/ieee802154/ieee802154_uart_pipe.c
@@ -127,7 +127,7 @@ static u8_t *upipe_rx(u8_t *buf, size_t *off)
 	if (upipe->rx_len == upipe->rx_off) {
 		struct net_buf *frag;
 
-		pkt = net_pkt_get_reserve_rx(K_NO_WAIT);
+		pkt = net_pkt_rx_alloc(K_NO_WAIT);
 		if (!pkt) {
 			LOG_DBG("No pkt available");
 			goto flush;
diff --git a/subsys/net/lib/openthread/platform/radio.c b/subsys/net/lib/openthread/platform/radio.c
index 43c472385ca..e602d8ab600 100644
--- a/subsys/net/lib/openthread/platform/radio.c
+++ b/subsys/net/lib/openthread/platform/radio.c
@@ -52,13 +52,13 @@ static u16_t channel;
 
 static void dataInit(void)
 {
-	tx_pkt = net_pkt_get_reserve_tx(K_NO_WAIT);
+	tx_pkt = net_pkt_alloc(K_NO_WAIT);
 	__ASSERT_NO_MSG(tx_pkt != NULL);
 
 	tx_payload = net_pkt_get_reserve_tx_data(K_NO_WAIT);
 	__ASSERT_NO_MSG(tx_payload != NULL);
 
-	net_pkt_frag_insert(tx_pkt, tx_payload);
+	net_pkt_append_buffer(tx_pkt, tx_payload);
 
 	sTransmitFrame.mPsdu = tx_payload->data;
 }
diff --git a/tests/net/6lo/src/main.c b/tests/net/6lo/src/main.c
index 122ad847972..6131824a872 100644
--- a/tests/net/6lo/src/main.c
+++ b/tests/net/6lo/src/main.c
@@ -308,12 +308,11 @@ static struct net_pkt *create_pkt(struct net_6lo_data *data)
 	u16_t len;
 	int remaining;
 
-	pkt = net_pkt_get_reserve_tx(K_FOREVER);
+	pkt = net_pkt_alloc_on_iface(net_if_get_default(), K_FOREVER);
 	if (!pkt) {
 		return NULL;
 	}
 
-	net_pkt_set_iface(pkt, net_if_get_default());
 	net_pkt_set_ip_hdr_len(pkt, NET_IPV6H_LEN);
 
 	net_pkt_lladdr_src(pkt)->addr = src_mac;
diff --git a/tests/net/ieee802154/fragment/src/main.c b/tests/net/ieee802154/fragment/src/main.c
index a0093997d07..91ad83d0ed3 100644
--- a/tests/net/ieee802154/fragment/src/main.c
+++ b/tests/net/ieee802154/fragment/src/main.c
@@ -236,12 +236,11 @@ static struct net_pkt *create_pkt(struct net_fragment_data *data)
 	u16_t len;
 	int remaining;
 
-	pkt = net_pkt_get_reserve_tx(K_FOREVER);
+	pkt = net_pkt_alloc_on_iface(net_if_get_default(), K_FOREVER);
 	if (!pkt) {
 		return NULL;
 	}
 
-	net_pkt_set_iface(pkt, net_if_get_default());
 	net_pkt_set_ip_hdr_len(pkt, NET_IPV6H_LEN);
 
 	buf = net_pkt_get_frag(pkt, K_FOREVER);
@@ -470,7 +469,7 @@ static bool test_fragment(struct net_fragment_data *data)
 		goto reassemble;
 	}
 
-	f_pkt = net_pkt_get_reserve_tx(K_FOREVER);
+	f_pkt = net_pkt_alloc(K_FOREVER);
 	if (!f_pkt) {
 		goto end;
 	}
@@ -509,7 +508,7 @@ reassemble:
 
 	buf = f_pkt->buffer;
 	while (buf) {
-		rxpkt = net_pkt_get_reserve_rx(K_FOREVER);
+		rxpkt = net_pkt_rx_alloc(K_FOREVER);
 		if (!rxpkt) {
 			goto end;
 		}
diff --git a/tests/net/ieee802154/l2/src/ieee802154_test.c b/tests/net/ieee802154/l2/src/ieee802154_test.c
index bf8af8b0f3b..ecede5c5357 100644
--- a/tests/net/ieee802154/l2/src/ieee802154_test.c
+++ b/tests/net/ieee802154/l2/src/ieee802154_test.c
@@ -219,7 +219,7 @@ static bool test_ack_reply(struct ieee802154_pkt_test *t)
 
 	NET_INFO("- Sending ACK reply to a data packet\n");
 
-	pkt = net_pkt_get_reserve_rx(K_FOREVER);
+	pkt = net_pkt_rx_alloc(K_FOREVER);
 	frag = net_pkt_get_frag(pkt, K_FOREVER);
 
 	memcpy(frag->data, data_pkt, sizeof(data_pkt));
@@ -267,7 +267,7 @@ static bool initialize_test_environment(void)
 
 	k_sem_reset(&driver_lock);
 
-	current_pkt = net_pkt_get_reserve_rx(K_FOREVER);
+	current_pkt = net_pkt_rx_alloc(K_FOREVER);
 	if (!current_pkt) {
 		NET_ERR("*** No buffer to allocate\n");
 		return false;