diff --git a/parsedmarc/elastic.py b/parsedmarc/elastic.py
index 8bc0171..5c7ca91 100644
--- a/parsedmarc/elastic.py
+++ b/parsedmarc/elastic.py
@@ -604,7 +604,9 @@ def save_forensic_report_to_elasticsearch(
             "A forensic sample to {0} from {1} "
             "with a subject of {2} and arrival date of {3} "
             "already exists in "
-            "Elasticsearch".format(to_, from_, subject, forensic_report["arrival_date_utc"])
+            "Elasticsearch".format(
+                to_, from_, subject, forensic_report["arrival_date_utc"]
+            )
         )
 
     parsed_sample = forensic_report["parsed_sample"]
diff --git a/parsedmarc/opensearch.py b/parsedmarc/opensearch.py
index 7d51e5f..d947ea7 100644
--- a/parsedmarc/opensearch.py
+++ b/parsedmarc/opensearch.py
@@ -604,7 +604,9 @@ def save_forensic_report_to_opensearch(
             "A forensic sample to {0} from {1} "
             "with a subject of {2} and arrival date of {3} "
             "already exists in "
-            "OpenSearch".format(to_, from_, subject, forensic_report["arrival_date_utc"])
+            "OpenSearch".format(
+                to_, from_, subject, forensic_report["arrival_date_utc"]
+            )
         )
 
     parsed_sample = forensic_report["parsed_sample"]
diff --git a/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py b/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py
index 46b4c89..0a66245 100755
--- a/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py
+++ b/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py
@@ -31,9 +31,11 @@ def _main():
     known_unknown_domains = []
     with open(known_unknown_list_file_path) as f:
         for line in f.readlines():
-            domain = line.lower().strip() 
+            domain = line.lower().strip()
             if domain in known_unknown_domains:
-                logger.warning(f"{domain} is in {known_unknown_list_file_path} multiple times")
+                logger.warning(
+                    f"{domain} is in {known_unknown_list_file_path} multiple times"
+                )
             else:
                 known_unknown_domains.append(domain)
     logger.info(f"Loading {base_reverse_dns_map_file_path}")
@@ -49,8 +51,10 @@ def _main():
                 known_domains.append(domain)
             if domain in known_unknown_domains and known_domains:
                 pass
-                logger.warning(f"{domain} is in {known_unknown_list_file_path} and {base_reverse_dns_map_file_path}")
-            
+                logger.warning(
+                    f"{domain} is in {known_unknown_list_file_path} and {base_reverse_dns_map_file_path}"
+                )
+
     logger.info(f"Checking domains against {base_reverse_dns_map_file_path}")
     with open(input_csv_file_path) as f:
         for row in csv.DictReader(f):