diff --git a/tests/testutils.py b/tests/testutils.py
index df7831e..862571f 100644
--- a/tests/testutils.py
+++ b/tests/testutils.py
@@ -35,8 +35,12 @@
 def simple_tcp_packet(pktlen=100, 
                       dl_dst='00:01:02:03:04:05',
                       dl_src='00:06:07:08:09:0a',
+                      dl_vlan_enable=False,
+                      dl_vlan=0,
+                      dl_vlan_pcp=0,
                       ip_src='192.168.0.1',
                       ip_dst='192.168.0.2',
+                      ip_tos=0,
                       tcp_sport=1234,
                       tcp_dport=80
                       ):
@@ -47,8 +51,12 @@
     @param len Length of packet in bytes w/o CRC
     @param dl_dst Destinatino MAC
     @param dl_src Source MAC
+    @param dl_vlan_enable True if the packet is with vlan, False otherwise
+    @param dl_vlan VLAN ID
+    @param dl_vlan_pcp VLAN priority
     @param ip_src IP source
     @param ip_dst IP destination
+    @param ip_tos IP ToS
     @param tcp_dport TCP destination port
     @param ip_sport TCP source port
 
@@ -56,9 +64,16 @@
     shouldn't assume anything about this packet other than that
     it is a valid ethernet/IP/TCP frame.
     """
-    pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \
-        scapy.IP(src=ip_src, dst=ip_dst)/ \
-        scapy.TCP(sport=tcp_sport, dport=tcp_dport)
+    if (dl_vlan_enable):
+        pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \
+            scapy.Dot1Q(prio=dl_vlan_pcp, id=0, vlan=dl_vlan)/ \
+            scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos)/ \
+            scapy.TCP(sport=tcp_sport, dport=tcp_dport)
+    else:
+        pkt = scapy.Ether(dst=dl_dst, src=dl_src)/ \
+            scapy.IP(src=ip_src, dst=ip_dst, tos=ip_tos)/ \
+            scapy.TCP(sport=tcp_sport, dport=tcp_dport)
+
     pkt = pkt/("D" * (pktlen - len(pkt)))
 
     return pkt