diff --git a/modules/device.py b/modules/device.py
index d28e670..5d2a216 100644
--- a/modules/device.py
+++ b/modules/device.py
@@ -890,16 +890,15 @@ class PhysicalDevice:
                     raise SyncExternalError(msg) from e
             else:
                 # If no updates are found, Zabbix interface is in-sync
-                e = f"Host {self.name}: interface in-sync."
-                self.logger.debug(e)
+                self.logger.debug("Host %s: interface in-sync.", self.name)
         else:
-            e = (
+            error_message = (
                 f"Host {self.name} has unsupported interface configuration."
                 f" Host has total of {len(host['interfaces'])} interfaces. "
                 "Manual intervention required."
             )
-            self.logger.error(e)
-            raise SyncInventoryError(e)
+            self.logger.error(error_message)
+            raise SyncInventoryError(error_message)
 
     def create_journal_entry(self, severity, message):
         """
diff --git a/netbox_zabbix_sync.py b/netbox_zabbix_sync.py
index 1f9ab44..76507c4 100755
--- a/netbox_zabbix_sync.py
+++ b/netbox_zabbix_sync.py
@@ -244,16 +244,16 @@ def main(arguments):
             if device.isCluster() and config["clustering"]:
                 # Check if device is primary or secondary
                 if device.promoteMasterDevice():
-                    e = f"Device {device.name}: is " f"part of cluster and primary."
-                    logger.info(e)
+                    logger.info(
+                        "Device %s: is part of cluster and primary.", device.name
+                    )
                 else:
                     # Device is secondary in cluster.
                     # Don't continue with this device.
-                    e = (
-                        f"Device {device.name}: is part of cluster "
-                        f"but not primary. Skipping this host..."
+                    logger.info(
+                        "Device %s: is part of cluster but not primary. Skipping this host...",
+                        device.name,
                     )
-                    logger.info(e)
                     continue
             # Checks if device is in cleanup state
             if device.status in config["zabbix_device_removal"]: