diff --git a/scapy/contrib/openflow.py b/scapy/contrib/openflow.py
index 954fd4a3a..f04ce3e0c 100755
--- a/scapy/contrib/openflow.py
+++ b/scapy/contrib/openflow.py
@@ -16,7 +16,7 @@ import struct
 from scapy.fields import *
 from scapy.layers.l2 import *
 from scapy.layers.inet import *
-from scapy.compat import orb
+from scapy.compat import orb, raw
 
 ### If prereq_autocomplete is True then match prerequisites will be
 ### automatically handled. See OFPMatch class.
@@ -95,7 +95,7 @@ class OFPPhyPort(Packet):
                     FlagsField("peer", 0, 32, ofp_port_features) ]
 
     def extract_padding(self, s):
-        return "", s
+        return b"", s
 
 class OFPMatch(Packet):
     name = "OFP_MATCH"
@@ -127,7 +127,7 @@ class OFPMatch(Packet):
                    ShortField("tp_dst", None) ]
 
     def extract_padding(self, s):
-        return "", s
+        return b"", s
 
     ### with post_build we create the wildcards field bit by bit
     def post_build(self, p, pay):
@@ -398,7 +398,7 @@ class QueuePropertyPacketListField(PacketListField):
     def getfield(self, pkt, s):
         lst = []
         l = 0
-        ret = ""
+        ret = b""
         remain = s
 
         while remain:
@@ -413,11 +413,11 @@ class QueuePropertyPacketListField(PacketListField):
 class OFPPacketQueue(Packet):
 
     def extract_padding(self, s):
-        return "", s
+        return b"", s
 
     def post_build(self, p, pay):
         if self.properties == []:
-            p += str(OFPQTNone())
+            p += raw(OFPQTNone())
         if self.len is None:
             l = len(p)+len(pay)
             p = p[:4] + struct.pack("!H", l) + p[6:]
@@ -439,7 +439,7 @@ class QueuePacketListField(PacketListField):
     def getfield(self, pkt, s):
         lst = []
         l = 0
-        ret = ""
+        ret = b""
         remain = s
 
         while remain:
@@ -969,7 +969,7 @@ class OFPTStatsRequestTable(_ofp_header):
 class OFPTableStats(Packet):
 
     def extract_padding(self, s):
-        return "", s
+        return b"", s
 
     name = "OFP_TABLE_STATS"
     fields_desc = [ ByteField("table_id", 0),
@@ -1019,7 +1019,7 @@ class OFPTStatsRequestPort(_ofp_header):
 class OFPPortStats(Packet):
 
     def extract_padding(self, s):
-        return "", s
+        return b"", s
 
     name = "OFP_PORT_STATS"
     fields_desc = [ ShortEnumField("port_no", 0, ofp_port_no),
diff --git a/scapy/contrib/openflow.uts b/scapy/contrib/openflow.uts
index 168fc5a97..d228b13f3 100755
--- a/scapy/contrib/openflow.uts
+++ b/scapy/contrib/openflow.uts
@@ -14,7 +14,7 @@ raw(ofm) == b'\x01\x02\x00\x08\x00\x00\x00\x00'
 ofm = OFPMatch(in_port=1, nw_tos=8)
 ofm = OFPMatch(raw(ofm))
 assert(ofm.wildcards1 == 0x1)
-ofm.wildcards2 == 0xfe
+ofm.wildcards2 == 0xee
 
 = OpenFlow(), generic method test with OFPTEchoRequest()
 ofm = OFPTEchoRequest()
@@ -37,7 +37,7 @@ act2 = OFPATOutput(port='CONTROLLER')
 act3 = OFPATSetDlSrc(dl_addr='1a:d5:cb:4e:3c:64')
 ofm = OFPTFlowMod(priority=1000, match=mtc, flags='CHECK_OVERLAP', actions=[act1,act2,act3])
 raw(ofm)
-s = b'\x01\x0e\x00h\x00\x00\x00\x00\x00?\xc8\xfd\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\n\x00\x00\x00\x00\x00\x00\x00\x00\xc0\xa8*\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\xe8\xff\xff\xff\xff\xff\xff\x00\x02\x00\x06\x00\x08\xc0\xa8*\x01\x00\x00\x00\x08\xff\xfd\xff\xff\x00\x04\x00\x10\x1a\xd5\xcbN<d\x00\x00\x00\x00\x00\x00'
+s = b'\x01\x0e\x00h\x00\x00\x00\x00\x00?\xc8\xed\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\n\x00\x00\x08\x00\x00\x00\x00\x00\xc0\xa8*\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\xe8\xff\xff\xff\xff\xff\xff\x00\x02\x00\x06\x00\x08\xc0\xa8*\x01\x00\x00\x00\x08\xff\xfd\xff\xff\x00\x04\x00\x10\x1a\xd5\xcbN<d\x00\x00\x00\x00\x00\x00'
 raw(ofm) == s
 
 = OFPETBadRequest() containing a flow_mod with wrong table_id
@@ -55,6 +55,21 @@ assert(isinstance(dat, Ether))
 assert(isinstance(dat.payload, IP))
 isinstance(dat.payload.payload, ICMP)
 
+= OFPTStatsReplyFlow()
+pkt = TCP()/OFPTStatsReplyFlow(flow_stats=[OFPFlowStats(actions=[OFPATSetTpSrc()])])
+pkt = TCP(raw(pkt))
+assert isinstance(pkt.flow_stats[0].actions[0], OFPATSetTpSrc)
+
+= OFPTQueueGetConfigReply()
+pkt = TCP()/OFPTQueueGetConfigReply(queues=[OFPPacketQueue(properties=[OFPQTMinRate(rate=123)])])
+pkt = TCP(raw(pkt))
+assert pkt.queues[0].properties[0].rate == 123
+
+= OFPETHelloFailed()
+pkt = OFPETHelloFailed(data=OFPTEchoRequest())
+pkt = OFPETHelloFailed(raw(pkt))
+assert isinstance(pkt.data, OFPTEchoRequest)
+
 + Layer bindings
 
 = TCP()/OFPTStatsRequestDesc(), check default sport