diff --git a/src/mods4pandas/tests/test_alto.py b/src/mods4pandas/tests/test_alto.py
index 96ff98c..849e076 100644
--- a/src/mods4pandas/tests/test_alto.py
+++ b/src/mods4pandas/tests/test_alto.py
@@ -1,8 +1,8 @@
-from pathlib import Path
 import re
-from lxml import etree as ET
-import pandas as pd
+from pathlib import Path
 
+import pandas as pd
+from lxml import etree as ET
 
 from ..alto4pandas import alto_to_dict, process
 from ..lib import flatten
diff --git a/src/mods4pandas/tests/test_mets.py b/src/mods4pandas/tests/test_mets.py
index b8db332..8d0bba1 100644
--- a/src/mods4pandas/tests/test_mets.py
+++ b/src/mods4pandas/tests/test_mets.py
@@ -1,8 +1,7 @@
 from lxml import etree as ET
 
-
-from ..mods4pandas import mets_to_dict
 from ..lib import flatten
+from ..mods4pandas import mets_to_dict
 
 
 def dict_fromstring(x):
diff --git a/src/mods4pandas/tests/test_mods4pandas.py b/src/mods4pandas/tests/test_mods4pandas.py
index 330369f..d7daf84 100644
--- a/src/mods4pandas/tests/test_mods4pandas.py
+++ b/src/mods4pandas/tests/test_mods4pandas.py
@@ -1,12 +1,12 @@
-from pathlib import Path
 import re
-from lxml import etree as ET
+from pathlib import Path
+
 import pandas as pd
 import pytest
+from lxml import etree as ET
 
-
-from ..mods4pandas import mods_to_dict, process
 from ..lib import flatten
+from ..mods4pandas import mods_to_dict, process
 
 TESTS_DATA_DIR = Path(__file__).parent / "data"
 
diff --git a/src/mods4pandas/tests/test_page_info.py b/src/mods4pandas/tests/test_page_info.py
index 5758aab..a57969e 100644
--- a/src/mods4pandas/tests/test_page_info.py
+++ b/src/mods4pandas/tests/test_page_info.py
@@ -5,7 +5,6 @@ from lxml import etree as ET
 
 from ..mods4pandas import pages_to_dict
 
-
 TESTS_DATA_DIR = Path(__file__).parent / "data"