diff --git a/ertviz/controllers/observation_response_controller.py b/ertviz/controllers/observation_response_controller.py
index 37116687..37380a3e 100644
--- a/ertviz/controllers/observation_response_controller.py
+++ b/ertviz/controllers/observation_response_controller.py
@@ -18,7 +18,6 @@ def _get_univariate_misfits_boxplots(misfits_df, color):
     misfits_data = list()
     for misfits in misfits_df.T:
         plot = BoxPlotModel(
-            x_axis=[int(x_axis[misfits])],
             y_axis=misfits_df.T[misfits].values,
             name=f"Misfits@{int(x_axis.loc[misfits])}",
             color=color,
diff --git a/ertviz/models/plot_model.py b/ertviz/models/plot_model.py
index 975a7f3c..efcee0e8 100644
--- a/ertviz/models/plot_model.py
+++ b/ertviz/models/plot_model.py
@@ -6,7 +6,6 @@
 class BoxPlotModel:
     def __init__(self, **kwargs):
         self.selected = True
-        self._x_axis = kwargs["x_axis"]
         self._y_axis = kwargs["y_axis"]
         self._name = kwargs["name"]
         self._color = kwargs["color"]
@@ -14,8 +13,6 @@ def __init__(self, **kwargs):
     @property
     def repr(self):
         repr_dict = dict(
-            # x=self._x_axis, this won't work :/
-            # need something else to get axis right if required
             y=self._y_axis,
             name=self.display_name,
             boxpoints="all",
diff --git a/tests/plots/test_controller.py b/tests/plots/test_controller.py
index 85094993..13886f3d 100644
--- a/tests/plots/test_controller.py
+++ b/tests/plots/test_controller.py
@@ -152,7 +152,6 @@ def test_boxplot_representation():
     data_df = pd.DataFrame(data=data, index=range(10))
 
     plot = BoxPlotModel(
-        x_axis=[5],
         y_axis=data_df.values,
         name="Boxplot@Location5",
         color=assets.ERTSTYLE["ensemble-selector"]["color_wheel"][0],