diff --git a/qemu/tests/block_discard.py b/qemu/tests/block_discard.py
index b44316d46571cf900a024990571f64c9a6e083c7..3f59f06d196559a03e83ed19f9f2e95844c54760 100644
--- a/qemu/tests/block_discard.py
+++ b/qemu/tests/block_discard.py
@@ -32,7 +32,7 @@ def run(test, params, env):
         """
         Get latest scsi disk which emulated by scsi_debug module.
         """
-        scsi_disk_info = process.system_output("lsscsi").splitlines()
+        scsi_disk_info = process.system_output("lsscsi").decode().splitlines()
         scsi_debug = [_ for _ in scsi_disk_info if 'scsi_debug' in _][-1]
         scsi_debug = scsi_debug.split()
         host_id = scsi_debug[0][1:-1]
diff --git a/qemu/tests/physical_resources_check.py b/qemu/tests/physical_resources_check.py
index f48a6f226da1c81b39d3d52f15823a18d569c9fb..353d3a53d6ff6afdf5b08da4013e07448363ad66 100644
--- a/qemu/tests/physical_resources_check.py
+++ b/qemu/tests/physical_resources_check.py
@@ -175,8 +175,8 @@ def run(test, params, env):
             test.error("Failed to get machine type from vm")
 
         machine_type_cmd = "%s -M ?" % utils_misc.get_qemu_binary(params)
-        machine_types = process.system_output(machine_type_cmd,
-                                              ignore_status=True)
+        machine_types = process.system_output(
+                machine_type_cmd, ignore_status=True).decode()
         machine_types = machine_types.split(':')[-1]
         machine_type_map = {}
         for machine_type in machine_types.splitlines():