diff --git a/src/calibre/gui2/dbus_export/menu.py b/src/calibre/gui2/dbus_export/menu.py
new file mode 100644
index 0000000000..3b5d1acf43
--- /dev/null
+++ b/src/calibre/gui2/dbus_export/menu.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+import dbus
+
+from calibre.utils.dbus_service import Object
+
+class DBusMenu(Object):
+
+    IFACE = 'com.canonical.dbusmenu'
+
+    def __init__(self, notifier, object_path, **kw):
+        self.notifier = notifier
+        bus = kw.get('bus')
+        if bus is None:
+            bus = kw['bus'] = dbus.SessionBus()
+        Object.__init__(self, bus, object_path)
+
+    def publish_new_menu(self):
+        pass
+
+
diff --git a/src/calibre/gui2/dbus_export/tray.py b/src/calibre/gui2/dbus_export/tray.py
index c8a3db91dc..f3d9a697f8 100644
--- a/src/calibre/gui2/dbus_export/tray.py
+++ b/src/calibre/gui2/dbus_export/tray.py
@@ -6,39 +6,22 @@ from __future__ import (unicode_literals, division, absolute_import,
 __license__ = 'GPL v3'
 __copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
 
-import os, sys, array, socket
+# Implement the StatusNotifierItem spec for creating a system tray icon in
+# modern linux desktop environments. See
+# http://www.notmart.org/misc/statusnotifieritem/index.html#introduction
+# This is not an actual standard, but is apparently used by GNOME, KDE and
+# Unity, which makes it necessary enough to implement.
+
+import os
 
 import dbus
 from PyQt5.Qt import (
-    QApplication, QObject, pyqtSignal, Qt, QPoint, QRect, QMenu, QImage, QSize, QIcon)
+    QApplication, QObject, pyqtSignal, Qt, QPoint, QRect, QMenu, QIcon)
 
+from calibre.gui2.dbus_export.menu import DBusMenu
+from calibre.gui2.dbus_export.utils import log, qicon_to_sni_image_list
 from calibre.utils.dbus_service import Object, method as dbus_method, BusName, dbus_property, signal as dbus_signal
 
-def log(*args, **kw):
-    kw['file'] = sys.stderr
-    print('StatusNotifier:', *args, **kw)
-    kw['file'].flush()
-
-def qicon_to_sni_image_list(qicon):
-    'See http://www.notmart.org/misc/statusnotifieritem/icons.html'
-    ans = dbus.Array(signature='(iiay)')
-    if not qicon.isNull():
-        sizes = qicon.availableSizes() or (QSize(x, x) for x in (32, 64, 128, 256))
-        tc = b'L' if array.array(b'I').itemsize < 4 else b'I'
-        for size in sizes:
-            # Convert to DBUS struct of width, height, and image data in ARGB32
-            # in network endianness
-            i = qicon.pixmap(size).toImage().convertToFormat(QImage.Format_ARGB32)
-            w, h = i.width(), i.height()
-            data = i.constBits().asstring(4 * w * h)
-            if socket.htonl(1) != 1:
-                # Host endianness != Network Endiannes
-                data = array.array(tc, i.constBits().asstring(4 * i.width() * i.height()))
-                data.byteswap()
-                data = data.tostring()
-            ans.append((w, h, dbus.ByteArray(data)))
-    return ans
-
 class Factory(QObject):
 
     'See http://www.notmart.org/misc/statusnotifieritem/statusnotifierwatcher.html'
@@ -186,20 +169,6 @@ class StatusNotifierItem(QObject):
     def icon(self):
         return self._icon
 
-class DBusMenu(Object):
-
-    IFACE = 'com.canonical.dbusmenu'
-
-    def __init__(self, notifier, object_path, **kw):
-        self.notifier = notifier
-        bus = kw.get('bus')
-        if bus is None:
-            bus = kw['bus'] = dbus.SessionBus()
-        Object.__init__(self, bus, object_path)
-
-    def publish_new_menu(self):
-        pass
-
 class StatusNotifierItemAPI(Object):
 
     'See http://www.notmart.org/misc/statusnotifieritem/statusnotifieritem.html'
diff --git a/src/calibre/gui2/dbus_export/utils.py b/src/calibre/gui2/dbus_export/utils.py
new file mode 100644
index 0000000000..dd3a3cd746
--- /dev/null
+++ b/src/calibre/gui2/dbus_export/utils.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+import sys, array, socket
+
+import dbus
+
+from PyQt5.Qt import QSize, QImage
+
+def log(*args, **kw):
+    kw['file'] = sys.stderr
+    print('StatusNotifier:', *args, **kw)
+    kw['file'].flush()
+
+
+def qicon_to_sni_image_list(qicon):
+    'See http://www.notmart.org/misc/statusnotifieritem/icons.html'
+    ans = dbus.Array(signature='(iiay)')
+    if not qicon.isNull():
+        sizes = qicon.availableSizes() or (QSize(x, x) for x in (32, 64, 128, 256))
+        tc = b'L' if array.array(b'I').itemsize < 4 else b'I'
+        for size in sizes:
+            # Convert to DBUS struct of width, height, and image data in ARGB32
+            # in network endianness
+            i = qicon.pixmap(size).toImage().convertToFormat(QImage.Format_ARGB32)
+            w, h = i.width(), i.height()
+            data = i.constBits().asstring(4 * w * h)
+            if socket.htonl(1) != 1:
+                # Host endianness != Network Endiannes
+                data = array.array(tc, i.constBits().asstring(4 * i.width() * i.height()))
+                data.byteswap()
+                data = data.tostring()
+            ans.append((w, h, dbus.ByteArray(data)))
+    return ans
+