diff --git a/pagexml/helper/pagexml_helper.py b/pagexml/helper/pagexml_helper.py
index c3d52d8..d66cf17 100644
--- a/pagexml/helper/pagexml_helper.py
+++ b/pagexml/helper/pagexml_helper.py
@@ -71,8 +71,7 @@ def regions_overlap(region1: pdm.PageXMLDoc, region2: pdm.PageXMLDoc,
     if v_overlap / height2 > threshold:
         if h_overlap / width2 > threshold:
             return True
-    else:
-        return False
+    return False
 
 
 def sort_regions_in_reading_order(doc: pdm.PageXMLDoc) -> List[pdm.PageXMLTextRegion]:
diff --git a/tests/helper-pagexml_helper_test.py b/tests/helper-pagexml_helper_test.py
index 250f00a..b078007 100644
--- a/tests/helper-pagexml_helper_test.py
+++ b/tests/helper-pagexml_helper_test.py
@@ -1,9 +1,9 @@
 import unittest
 from typing import List, Tuple
 
-from pagexml.parser import parse_pagexml_file
 import pagexml.helper.pagexml_helper as helper
 import pagexml.model.physical_document_model as pdm
+from pagexml.parser import parse_pagexml_file
 
 
 def make_region(points: List[Tuple[int, int]], doc_id: str = 'doc') -> pdm.PageXMLTextRegion: