diff --git a/panels/bed_level.py b/panels/bed_level.py
index 4993f4ab..7dae3bb0 100644
--- a/panels/bed_level.py
+++ b/panels/bed_level.py
@@ -48,11 +48,13 @@ class BedLevelPanel(ScreenPanel):
                 self._get_offsets("bltouch")
             elif "probe" in self._screen.printer.get_config_section_list():
                 self._get_offsets("probe")
-            new_screws = []
             # bed_screws uses NOZZLE positions
             # screws_tilt_adjust uses PROBE positions and to be offseted for the buttons to work equal to bed_screws
-            for screw in self.screws:
-                new_screws.append([round(screw[0] + self.x_offset, 1), round(screw[1] + self.y_offset, 1)])
+            new_screws = [
+                [round(screw[0] + self.x_offset, 1), round(screw[1] + self.y_offset, 1)]
+                for screw in self.screws
+            ]
+
             self.screws = new_screws
             logging.info(f"screws with offset: {self.screws}")
         elif "bed_screws" in self._screen.printer.get_config_section_list():
@@ -110,9 +112,9 @@ class BedLevelPanel(ScreenPanel):
             for screw in screw_positions:
                 if screw not in ("bl", "fl", "fr", "br", "bm", "fm", "lm", "rm", ""):
                     logging.error(f"Unknown screw: {screw}")
-                    self._screen.show_popup_message(_("Unknown screw position") + ": %s" % screw)
+                    self._screen.show_popup_message(_("Unknown screw position") + f": {screw}")
                     valid_positions = False
-            if not(3 <= len(screw_positions) <= 8):
+            if not (3 <= len(screw_positions) <= 8):
                 valid_positions = False
             rotation = printer_cfg.getint("screw_rotation", 0)
             logging.info(f"Rotation: {rotation}")
@@ -142,7 +144,7 @@ class BedLevelPanel(ScreenPanel):
                 bedgrid.attach(self.labels['lm'], 1, 1, 1, 1)
             if "rm" in screw_positions:
                 bedgrid.attach(self.labels['rm'], 3, 1, 1, 1)
-        elif nscrews in (4, 6, 8):
+        elif nscrews in {4, 6, 8}:
             bedgrid.attach(self.labels['bl'], 1, 0, 1, 1)
             bedgrid.attach(self.labels['fl'], 1, 2, 1, 1)
             bedgrid.attach(self.labels['fr'], 3, 2, 1, 1)
diff --git a/panels/system.py b/panels/system.py
index ba7830e6..7a7367f0 100644
--- a/panels/system.py
+++ b/panels/system.py
@@ -201,9 +201,9 @@ class SystemPanel(ScreenPanel):
 
         if "package_count" in info:
             label.set_markup((
-                    f'<b>{info["package_count"]} '
-                    + ngettext("Package will be updated", "Packages will be updated", info["package_count"])
-                    + f':</b>\n'
+                f'<b>{info["package_count"]} '
+                + ngettext("Package will be updated", "Packages will be updated", info["package_count"])
+                + f':</b>\n'
             ))
             label.set_halign(Gtk.Align.CENTER)
             vbox.add(label)