diff --git a/generic/tests/pxe_boot.py b/generic/tests/pxe_boot.py
index d089d4a377394016cc6f738e32a12610c9d4c890..89ea1d6b7fc1badf122c15a97c39b60e33e3dacb 100644
--- a/generic/tests/pxe_boot.py
+++ b/generic/tests/pxe_boot.py
@@ -24,7 +24,7 @@ def run(test, params, env):
     timeout = int(params.get("pxe_timeout", 60))
 
     error_context.context("Snoop packet in the tap device", logging.info)
-    tcpdump_cmd = "tcpdump -nli %s" % vm.get_ifname()
+    tcpdump_cmd = "tcpdump -nli %s port '(tftp or bootps)'" % vm.get_ifname()
     try:
         tcpdump_process = aexpect.run_bg(command=tcpdump_cmd,
                                          output_func=logging.debug,
diff --git a/qemu/tests/pxe_query_cpus.py b/qemu/tests/pxe_query_cpus.py
index 25129b1a7e8eb554ee79dc45485e092315302bb2..d820f3e80c6577f4f4cdea0856546de259cf5f22 100644
--- a/qemu/tests/pxe_query_cpus.py
+++ b/qemu/tests/pxe_query_cpus.py
@@ -15,7 +15,7 @@ from virttest import env_process
 @error_context.context_aware
 def _capture_tftp(test, vm, timeout):
     error_context.context("Snoop packet in the tap device", logging.info)
-    output = aexpect.run_fg("tcpdump -nli %s" % vm.get_ifname(),
+    output = aexpect.run_fg("tcpdump -nli %s port '(tftp or bootps)'" % vm.get_ifname(),
                             logging.debug, "(pxe capture) ", timeout)[1]
 
     error_context.context("Analyzing the tcpdump result", logging.info)
@@ -84,7 +84,7 @@ def run(test, params, env):
         while True:
             count += 1
             try:
-                vm.monitor.info("cpus")
+                vm.monitor.info("cpus", debug=False)
                 vm.verify_status("running")
                 if not bg.is_alive():
                     break