diff --git a/test_plans/perf_vm2vm_virtio_net_perf_test_plan.rst b/test_plans/perf_vm2vm_virtio_net_perf_test_plan.rst
index 60e7abd0..c284c0f3 100644
--- a/test_plans/perf_vm2vm_virtio_net_perf_test_plan.rst
+++ b/test_plans/perf_vm2vm_virtio_net_perf_test_plan.rst
@@ -97,58 +97,8 @@ Test Case 1: Perf VM2VM split ring vhost-user/virtio-net test with tcp traffic
 
 6. Check iperf throughput can get expected data.
 
-Test Case 2: Perf VM2VM split ring vhost-user/virtio-net dequeue zero-copy test with tcp traffic
-================================================================================================
 
-1. Launch the Vhost sample by below commands::
-
-    rm -rf vhost-net*
-    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
-    testpmd>start
-
-2. Launch VM1 and VM2::
-
-    taskset -c 13 qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6002-:22 \
-    -chardev socket,id=char0,path=./vhost-net0 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
-
-    taskset -c 15 qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16-2.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
-    -chardev socket,id=char0,path=./vhost-net1 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
-
-3. On VM1, set virtio device IP and run arp protocal::
-
-    ifconfig ens5 1.1.1.2
-    arp -s 1.1.1.8 52:54:00:00:00:02
-
-4. On VM2, set virtio device IP and run arp protocal::
-
-    ifconfig ens5 1.1.1.8
-    arp -s 1.1.1.2 52:54:00:00:00:01
-
-5. Check the iperf performance between two VMs by below commands::
-
-    Under VM1, run: `iperf -s -i 1`
-    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
-
-6. Check iperf throughput can get expected data.
-
-Test Case 3: Perf VM2VM packed ring vhost-user/virtio-net test with tcp traffic
+Test Case 2: Perf VM2VM packed ring vhost-user/virtio-net test with tcp traffic
 ===============================================================================
 
 1. Launch the Vhost sample by below commands::
@@ -198,54 +148,3 @@ Test Case 3: Perf VM2VM packed ring vhost-user/virtio-net test with tcp traffic
     Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
 
 6. Check iperf throughput can get expected data.
-
-Test Case 4: Perf VM2VM packed ring vhost-user/virtio-net dequeue zero-copy test with tcp traffic
-=================================================================================================
-
-1. Launch the Vhost sample by below commands::
-
-    rm -rf vhost-net*
-    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
-    testpmd>start
-
-2. Launch VM1 and VM2::
-
-    taskset -c 13 qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6002-:22 \
-    -chardev socket,id=char0,path=./vhost-net0 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :10
-
-    taskset -c 15 qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16-2.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
-    -chardev socket,id=char0,path=./vhost-net1 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :12
-
-3. On VM1, set virtio device IP and run arp protocal::
-
-    ifconfig ens3 1.1.1.2
-    arp -s 1.1.1.8 52:54:00:00:00:02
-
-4. On VM2, set virtio device IP and run arp protocal::
-
-    ifconfig ens3 1.1.1.8
-    arp -s 1.1.1.2 52:54:00:00:00:01
-
-5. Check the iperf performance between two VMs by below commands::
-
-    Under VM1, run: `iperf -s -i 1`
-    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
-
-6. Check iperf throughput can get expected data.
\ No newline at end of file
diff --git a/tests/TestSuite_perf_vm2vm_virtio_net_perf.py b/tests/TestSuite_perf_vm2vm_virtio_net_perf.py
index 7116eece..ac0e38a2 100644
--- a/tests/TestSuite_perf_vm2vm_virtio_net_perf.py
+++ b/tests/TestSuite_perf_vm2vm_virtio_net_perf.py
@@ -164,16 +164,12 @@ class TestPerfVM2VMVirtioNetPerf(TestCase):
 
         self.verify("FAIL" not in status_result, "Exceeded Gap")
 
-    def start_vhost_testpmd(self, zerocopy=False):
+    def start_vhost_testpmd(self):
         """
         launch the testpmd with different parameters
         """
-        if zerocopy is True:
-            zerocopy_arg = ",dequeue-zero-copy=1"
-        else:
-            zerocopy_arg = ""
-        vdev1 = "--vdev 'net_vhost0,iface=%s/vhost-net0,queues=1%s' " % (self.base_dir, zerocopy_arg)
-        vdev2 = "--vdev 'net_vhost1,iface=%s/vhost-net1,queues=1%s' " % (self.base_dir, zerocopy_arg)
+        vdev1 = "--vdev 'net_vhost0,iface=%s/vhost-net0,queues=1' " % self.base_dir
+        vdev2 = "--vdev 'net_vhost1,iface=%s/vhost-net1,queues=1' " % self.base_dir
         eal_params = self.dut.create_eal_parameters(cores=self.cores_list, prefix='vhost', no_pci=True)
         para = " -- -i --nb-cores=2 --txd=1024 --rxd=1024"
         self.command_line = self.path + eal_params + vdev1 + vdev2 + para
@@ -227,11 +223,11 @@ class TestPerfVM2VMVirtioNetPerf(TestCase):
         self.vm_dut[0].send_expect("arp -s %s %s" % (self.virtio_ip2, self.virtio_mac2), "#", 10)
         self.vm_dut[1].send_expect("arp -s %s %s" % (self.virtio_ip1, self.virtio_mac1), "#", 10)
 
-    def prepare_test_env(self, zerocopy, path_mode, packed_mode=False):
+    def prepare_test_env(self, path_mode, packed_mode=False):
         """
         start vhost testpmd and qemu, and config the vm env
         """
-        self.start_vhost_testpmd(zerocopy)
+        self.start_vhost_testpmd()
         self.start_vms(mode=path_mode, packed=packed_mode)
         self.config_vm_env()
 
@@ -310,24 +306,10 @@ class TestPerfVM2VMVirtioNetPerf(TestCase):
         """
         VM2VM split ring vhost-user/virtio-net test with tcp traffic
         """
-        zerocopy = False
         path_mode = "tso"
         self.test_target = "split_tso"
         self.expected_throughput = self.get_suite_cfg()['expected_throughput'][self.test_target]
-        self.prepare_test_env(zerocopy, path_mode)
-        self.start_iperf_and_verify_vhost_xstats_info(mode="tso")
-        self.handle_expected()
-        self.handle_results()
-
-    def test_vm2vm_split_ring_dequeue_zero_copy_iperf_with_tso(self):
-        """
-        VM2VM split ring vhost-user/virtio-net zero copy test with tcp traffic
-        """
-        zerocopy = True
-        path_mode = "tso"
-        self.test_target = "split_zero_copy_tso"
-        self.expected_throughput = self.get_suite_cfg()['expected_throughput'][self.test_target]
-        self.prepare_test_env(zerocopy, path_mode)
+        self.prepare_test_env(path_mode)
         self.start_iperf_and_verify_vhost_xstats_info(mode="tso")
         self.handle_expected()
         self.handle_results()
@@ -336,26 +318,11 @@ class TestPerfVM2VMVirtioNetPerf(TestCase):
         """
         VM2VM packed ring vhost-user/virtio-net test with tcp traffic
         """
-        zerocopy = False
         path_mode = "tso"
         self.test_target = "packed_tso"
         self.expected_throughput = self.get_suite_cfg()['expected_throughput'][self.test_target]
         packed_mode = True
-        self.prepare_test_env(zerocopy, path_mode, packed_mode)
-        self.start_iperf_and_verify_vhost_xstats_info(mode="tso")
-        self.handle_expected()
-        self.handle_results()
-
-    def test_vm2vm_packed_ring_dequeue_zero_copy_iperf_with_tso(self):
-        """
-        VM2VM packed ring vhost-user/virtio-net zero copy test with tcp traffic
-        """
-        zerocopy = True
-        path_mode = "tso"
-        packed_mode = True
-        self.test_target = "packed_zero_copy_tso"
-        self.expected_throughput = self.get_suite_cfg()['expected_throughput'][self.test_target]
-        self.prepare_test_env(zerocopy, path_mode, packed_mode)
+        self.prepare_test_env(path_mode, packed_mode)
         self.start_iperf_and_verify_vhost_xstats_info(mode="tso")
         self.handle_expected()
         self.handle_results()
