diff --git a/pphelper/hardware.py b/pphelper/hardware.py
index 203d00c..304600d 100644
--- a/pphelper/hardware.py
+++ b/pphelper/hardware.py
@@ -1184,29 +1184,32 @@ def _send(self, message):
             pass
 
     @property
-    def config_file(self):
+    def test_mode(self):
         """
-        The absolute path to the configuration file.
+        :type:  :obj:`bool`
 
-        :getter: Return the currently set configuration file path.
-        :setter: Set the configuration file path. Must be an absolute path.
-        :type: string
+        :obj:`True` if we're in test mode,  :obj:`False` otherwise.
+
+        Notes
+        -----
+        This property can only be set on class instantiation by passing
+        the ``test_mode`` keyword argument.
 
         """
-        return self._config_file
+        return self._test_mode
 
-    @config_file.setter
-    def config_file(self, path):
+    @property
+    def config_file(self):
         """
-        Set the path to the configuration file. An absolute path is required.
+        :type: string
 
-        Parameters
-        ----------
-        path : string
-            The path to the configuration file, e.g.,
-            'C:\\Users\EEG\\Desktop\\Experiment\\config.xml'.
+        The absolute path to the configuration file.
 
         """
+        return self._config_file
+
+    @config_file.setter
+    def config_file(self, path):
         msg = '1%s' % path
         self._send(msg)
         time.sleep(1.2)
@@ -1310,8 +1313,11 @@ def recording(self):
         :type: bool
 
         `True` if we're currently recording data, and `False` otherwise.
-        This property cannot be set directly. Use ``start_recording()`` and
-        `stop_recording` instead.
+
+        Notes
+        -----
+        This property cannot be set directly. Use
+        :func:`~start_recording` and :func:`~stop_recording` instead.
 
         """
         return self._recording