diff --git a/src/calibre/devices/kobo/kobotouch_config.py b/src/calibre/devices/kobo/kobotouch_config.py
index 4f01b2adbc..7c9bf07a2e 100644
--- a/src/calibre/devices/kobo/kobotouch_config.py
+++ b/src/calibre/devices/kobo/kobotouch_config.py
@@ -1121,7 +1121,7 @@ class TemplateConfig(QWidget):  # {{{
 
         tmpl = self.template
         try:
-            v = validation_formatter.validate(tmpl)
+            validation_formatter.validate(tmpl)
             return True
         except Exception as err:
             error_dialog(self, _('Invalid template for {0}').format(self.name),
diff --git a/src/calibre/gui2/device_drivers/tabbed_device_config.py b/src/calibre/gui2/device_drivers/tabbed_device_config.py
index 1fe7bbab1b..b530cf92f5 100644
--- a/src/calibre/gui2/device_drivers/tabbed_device_config.py
+++ b/src/calibre/gui2/device_drivers/tabbed_device_config.py
@@ -64,14 +64,14 @@ class TabbedDeviceConfig(QTabWidget):
     from DeviceOptionsGroupBox, are created to further group the options. The group
     boxes can be coded to support any control type and dependencies between them.
 
-    Set validate_before_accept to True if you want validation() to be called
+    Set validate_before_accept to True if you want validate() to be called
     when OK is pressed
     '''
 
     def __init__(self, device_settings, all_formats, supports_subdirs,
                     must_read_metadata, supports_use_author_sort,
                     extra_customization_message, device,
-                    extra_customization_choices=None, parent=None, validate_before_accept = False):
+                    extra_customization_choices=None, parent=None, validate_before_accept=False):
         QTabWidget.__init__(self, parent)
         self._device = weakref.ref(device)