diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 257d375..a5bec9a 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -154,8 +154,8 @@ class ChannelGraphs:
         self._i_widget = i_widget
 
         self._t_plot = LiveLinePlot()
-        self._i_plot = LiveLinePlot(name='Measured')
-        self._iset_plot = LiveLinePlot(name='Set', pen=pg.mkPen('r'))
+        self._i_plot = LiveLinePlot(name="Measured")
+        self._iset_plot = LiveLinePlot(name="Set", pen=pg.mkPen('r'))
 
         self._t_line = self._t_widget.getPlotItem().addLine(label='{value} °C')
         self._t_line.setVisible(False)