diff --git a/hnn_core/gui/gui.py b/hnn_core/gui/gui.py
index 1a5a29bcd1..62e2438ae0 100644
--- a/hnn_core/gui/gui.py
+++ b/hnn_core/gui/gui.py
@@ -262,7 +262,7 @@ def __init__(self, theme_color="#8A2BE2",
         self.simulation_list_widget = Dropdown(options=[],
                                                value=None,
                                                description='',
-                                               layout={'width': 'max-content'})
+                                               layout={'width': '15%'})
         # Drive selection
         self.widget_drive_type_selection = RadioButtons(
             options=['Evoked', 'Poisson', 'Rhythmic'],
@@ -1215,8 +1215,6 @@ def on_upload_data_change(change, data, viz_manager, log_out):
     data_fname = dict_name[0]
     file_extension = f".{dict_name[1]}"
 
-    # data_fname = data_dict['name'].rstrip('.txt')
-
     if data_fname in data['simulation_data'].keys():
         logger.error(f"Found existing data: {data_fname}.")
         return