diff --git a/pmb/install/format.py b/pmb/install/format.py
index 45cdf555..2e2762a4 100644
--- a/pmb/install/format.py
+++ b/pmb/install/format.py
@@ -15,8 +15,8 @@ def format_and_mount_boot(args, boot_label):
     mountpoint = "/mnt/install/boot"
     device = "/dev/installp1"
     filesystem = args.deviceinfo["boot_filesystem"] or "ext2"
-    logging.info("(native) format " + device + " (boot, " + filesystem + "), mount to " +
-                 mountpoint)
+    logging.info(f"(native) format {device} (boot, {filesystem}), mount to"
+                 " mountpoint")
     if filesystem == "fat16":
         pmb.chroot.root(args, ["mkfs.fat", "-F", "16", "-n", boot_label,
                                device])
diff --git a/test/static_code_analysis.sh b/test/static_code_analysis.sh
index 44c2923c..47a7a014 100755
--- a/test/static_code_analysis.sh
+++ b/test/static_code_analysis.sh
@@ -88,6 +88,7 @@ py_files="
 	pmb/helpers/status.py
 	pmb/helpers/ui.py
 	pmb/install/__init__.py
+	pmb/install/format.py
 	pmb/install/recovery.py
 	pmb/install/ui.py
 	pmb/parse/__init__.py