diff --git a/scripts/qemu.py b/scripts/qemu.py
index f6d2e68627996d02f3820324cd8cf8a1e9ace12c..9bfdf6d37d989cd30475445f97829bc230364d9c 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -54,7 +54,7 @@ class QEMUMachine(object):
 
     def __init__(self, binary, args=None, wrapper=None, name=None,
                  test_dir="/var/tmp", monitor_address=None,
-                 socket_scm_helper=None, debug=False):
+                 socket_scm_helper=None):
         '''
         Initialize a QEMUMachine
 
@@ -65,7 +65,6 @@ def __init__(self, binary, args=None, wrapper=None, name=None,
         @param test_dir: where to create socket and log file
         @param monitor_address: address for QMP monitor
         @param socket_scm_helper: helper program, required for send_fd_scm()"
-        @param debug: enable debug mode
         @note: Qemu process is not started until launch() is used.
         '''
         if args is None:
@@ -85,12 +84,11 @@ def __init__(self, binary, args=None, wrapper=None, name=None,
         self._events = []
         self._iolog = None
         self._socket_scm_helper = socket_scm_helper
-        self._debug = debug
         self._qmp = None
         self._qemu_full_args = None
 
         # just in case logging wasn't configured by the main script:
-        logging.basicConfig(level=(logging.DEBUG if debug else logging.WARN))
+        logging.basicConfig()
 
     def __enter__(self):
         return self
diff --git a/tests/migration/guestperf/engine.py b/tests/migration/guestperf/engine.py
index 0a13050bc609ac28826504dbb745ddf78226720a..e14d4320b23927df71e5699930af7b9f4744255b 100644
--- a/tests/migration/guestperf/engine.py
+++ b/tests/migration/guestperf/engine.py
@@ -388,15 +388,13 @@ def run(self, hardware, scenario, result_dir=os.getcwd()):
                                args=self._get_src_args(hardware),
                                wrapper=self._get_src_wrapper(hardware),
                                name="qemu-src-%d" % os.getpid(),
-                               monitor_address=srcmonaddr,
-                               debug=self._debug)
+                               monitor_address=srcmonaddr)
 
         dst = qemu.QEMUMachine(self._binary,
                                args=self._get_dst_args(hardware, uri),
                                wrapper=self._get_dst_wrapper(hardware),
                                name="qemu-dst-%d" % os.getpid(),
-                               monitor_address=dstmonaddr,
-                               debug=self._debug)
+                               monitor_address=dstmonaddr)
 
         try:
             src.launch()
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 36a7757aafb0b3deeac30e142d6e73b15a8c39e9..6f057904a9ae79bbe98a196c1321cd76c7106de6 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -195,8 +195,6 @@ def __init__(self, path_suffix=''):
         super(VM, self).__init__(qemu_prog, qemu_opts, name=name,
                                  test_dir=test_dir,
                                  socket_scm_helper=socket_scm_helper)
-        if debug:
-            self._debug = True
         self._num_drives = 0
 
     def add_device(self, opts):