diff --git a/qemu/tests/boot_order_check.py b/qemu/tests/boot_order_check.py
index 66ee4b4d671e7b786af3920b03e6bddb68d61dfe..92fb86944cd6509f961df637c42e250e54565fe7 100644
--- a/qemu/tests/boot_order_check.py
+++ b/qemu/tests/boot_order_check.py
@@ -7,6 +7,13 @@ from avocado.utils import process
 from virttest import error_context
 
 
+try:
+    cmp
+except NameError:
+    def cmp(x, y):
+        return (x > y) - (x < y)
+
+
 @error_context.context_aware
 def run(test, params, env):
     """
diff --git a/qemu/tests/netperf_udp.py b/qemu/tests/netperf_udp.py
index 2045ba06a4b6930a4232f215754ae175b00df52f..50b77b51e391ee5ac6b82a86fffa6555c02cf181 100644
--- a/qemu/tests/netperf_udp.py
+++ b/qemu/tests/netperf_udp.py
@@ -172,7 +172,8 @@ def run(test, params, env):
     finally:
         netperf_server.stop()
 
-    file(os.path.join(test.debugdir, "udp_results"), "w").write(msg)
+    with open(os.path.join(test.debugdir, "udp_results"), "w") as result_file:
+        result_file.write(msg)
     failratio = float(params.get("failratio", 0.3))
     error_context.context("Compare UDP performance.", logging.info)
     for i in range(len(throughput) - 1):
diff --git a/qemu/tests/qemu_nobody.py b/qemu/tests/qemu_nobody.py
index 052e287d07516f4600357f621fdf247491f15cd9..0ba89d2b29ba2ee41c4b9146dcf78e78e5bbb980 100644
--- a/qemu/tests/qemu_nobody.py
+++ b/qemu/tests/qemu_nobody.py
@@ -7,6 +7,13 @@ from virttest import env_process
 from virttest import error_context
 
 
+try:
+    cmp
+except NameError:
+    def cmp(x, y):
+        return (x > y) - (x < y)
+
+
 @env_process.context_aware
 def run(test, params, env):
     """
diff --git a/qemu/tests/timedrift_monotonicity.py b/qemu/tests/timedrift_monotonicity.py
index 46c347e07983785a5a6375ea47e1d7f197455a70..971895df14751e535525b75b2b773740fa6efb27 100644
--- a/qemu/tests/timedrift_monotonicity.py
+++ b/qemu/tests/timedrift_monotonicity.py
@@ -38,9 +38,8 @@ def run(test, params, env):
             if float(tv) < float(lasttv):
                 p_tv = "time value = " + tv + "\n"
                 p_lasttv = "last time value = " + lasttv + "\n"
-                time_log = file(host_path, 'a')
-                time_log.write("time went backwards:\n" + p_tv + p_lasttv)
-                time_log.close()
+                with open(host_path, 'a') as time_log:
+                    time_log.write("time went backwards:\n" + p_tv + p_lasttv)
             lasttv = tv
             time.sleep(0.1)
 
@@ -86,12 +85,11 @@ def run(test, params, env):
             log_dir = os.path.join(test.outputdir,
                                    "timedrift-monotonicity-result.txt")
             shutil.copyfile(host_path, log_dir)
-            myfile = file(host_path, 'r')
-            for line in myfile:
-                if "time went backwards" in line:
-                    myfile.close()
-                    test.fail("Failed Time Monotonicity testing, "
-                              "Please check log %s" % host_path)
+            with open(host_path, 'r') as myfile:
+                for line in myfile:
+                    if "time went backwards" in line:
+                        test.fail("Failed Time Monotonicity testing, "
+                                  "Please check log %s" % host_path)
     finally:
         session1.close()
         # remove flags add for this test.
diff --git a/qemu/tests/trace_cmd_boot.py b/qemu/tests/trace_cmd_boot.py
index 61ea776550c3b179972aca653f134bdfe99818dc..48cc22a97d230a70e8e7cc7789abf7fd3030fff7 100644
--- a/qemu/tests/trace_cmd_boot.py
+++ b/qemu/tests/trace_cmd_boot.py
@@ -75,7 +75,8 @@ def run(test, params, env):
                     logging.warn("trace-cmd could not finish after 120s.")
                 trace_job = None
                 process.system(trace_report_cmd, shell=True)
-                report_txt = file(report_file).read()
+                with open(report_file) as report_f:
+                    report_txt = report_f.read()
                 txt = "Check whether the trace.txt includes the error log."
                 error_context.context(txt, logging.info)
                 if re.findall(re_trace, report_txt, re.S):
diff --git a/qemu/tests/win_virtio_serial_data_transfer_reboot.py b/qemu/tests/win_virtio_serial_data_transfer_reboot.py
index 3407d6780678b9156e61102e811c13dfd2335776..938238c586759e5d216545476c58191f2374c666 100644
--- a/qemu/tests/win_virtio_serial_data_transfer_reboot.py
+++ b/qemu/tests/win_virtio_serial_data_transfer_reboot.py
@@ -39,7 +39,8 @@ def run(test, params, env):
 
     def receive_data(test, session, serial_receive_cmd, data_file):
         output = session.cmd_output(serial_receive_cmd, timeout=30)
-        ori_data = file(data_file, "r").read()
+        with open(data_file, "r") as data_file:
+            ori_data = data_file.read()
         if ori_data.strip() != output.strip():
             err = "Data lost during transfer. Origin data is:\n%s" % ori_data
             err += "Guest receive data:\n%s" % output