diff --git a/tests/net/socket/af_packet_ipproto_raw/src/main.c b/tests/net/socket/af_packet_ipproto_raw/src/main.c
index a115ff56933..840a1be25d4 100644
--- a/tests/net/socket/af_packet_ipproto_raw/src/main.c
+++ b/tests/net/socket/af_packet_ipproto_raw/src/main.c
@@ -35,7 +35,7 @@ static int fake_dev_send(const struct device *dev, struct net_pkt *pkt)
 	ARG_UNUSED(pkt);
 
 	/* Loopback the data back to stack: */
-	NET_DBG("Dummy device: Loopbacking data (%d bytes) to iface %d\n", net_pkt_get_len(pkt),
+	NET_DBG("Dummy device: Loopbacking data (%zd bytes) to iface %d\n", net_pkt_get_len(pkt),
 	    net_if_get_by_iface(net_pkt_iface(pkt)));
 
 	recv_pkt = net_pkt_clone(pkt, K_NO_WAIT);
diff --git a/tests/net/socket/misc/src/main.c b/tests/net/socket/misc/src/main.c
index 004232e89bf..3d1e666c642 100644
--- a/tests/net/socket/misc/src/main.c
+++ b/tests/net/socket/misc/src/main.c
@@ -96,7 +96,7 @@ static int dummy_send(const struct device *dev, struct net_pkt *pkt)
 	ARG_UNUSED(dev);
 	ARG_UNUSED(pkt);
 
-	NET_DBG("Sending data (%d bytes) to iface %d\n",
+	NET_DBG("Sending data (%zd bytes) to iface %d\n",
 		net_pkt_get_len(pkt), net_if_get_by_iface(net_pkt_iface(pkt)));
 
 	current_dev = dev;