diff --git a/src/gcp_scanner/credsdb.py b/src/gcp_scanner/credsdb.py
index 78aebeb5..cf2c47c0 100644
--- a/src/gcp_scanner/credsdb.py
+++ b/src/gcp_scanner/credsdb.py
@@ -189,7 +189,7 @@ def find_creds(explicit_path: Optional[str] = None) -> List[str]:
         search_paths.append(full_path)
 
   for dir_path in search_paths:
-    logging.info(f"Scanning {dir_path} for credentials.db")
+    logging.info("Scanning %s for credentials.db", dir_path)
     full_path = os.path.join(dir_path, "credentials.db")
     if os.path.exists(full_path) and os.access(full_path, os.R_OK):
       print(f"Identified accessible gcloud config profile {full_path}")
diff --git a/src/gcp_scanner/scanner.py b/src/gcp_scanner/scanner.py
index e6a9b383..e0b76daf 100644
--- a/src/gcp_scanner/scanner.py
+++ b/src/gcp_scanner/scanner.py
@@ -328,7 +328,7 @@ def impersonate_service_accounts(
 
   # trying to impersonate SAs within project
   if impers is not None and impers.get('impersonate', False) is True:
-    logging.info(f'Looking for impersonation options in {project_id}')
+    logging.info('Looking for impersonation options in %s', project_id)
     iam_client = iam_client_for_credentials(credentials)
     if is_set(scan_config, 'iam_policy') is False:
       iam_policy = CrawlerFactory.create_crawler('iam_policy').crawl(
@@ -570,13 +570,14 @@ def main():
                 (
                     item
                     for item in project_list
-                    if item["projectId"] == force_project_id
+                    if item['projectId'] == force_project_id
                 ),
                 None,
             )
             is not None
         ):
-          logging.info(f"The project {force_project_id} is already in the list")
+          logging.info('The project %s is already in the list',
+                       force_project_id)
           continue
         res = CrawlerFactory.create_crawler(
             'project_info',
@@ -624,7 +625,7 @@ def main():
 
   # See i#267 on why we use the native threading approach here.
   for i, project_obj in enumerate(project_queue):
-    logging.info('Finished %d projects out of %d' % (i, len(project_queue) - 1))
+    logging.info('Finished %d projects out of %d', i, len(project_queue) - 1)
     sync_t = threading.Thread(target=scanner.get_resources, args=(project_obj,))
     sync_t.daemon = True
     sync_t.start()