diff --git a/tests/test_14_read_only_list_file.py b/tests/test_14_read_only_list_file.py
index 33bdc5de..d81d9e37 100644
--- a/tests/test_14_read_only_list_file.py
+++ b/tests/test_14_read_only_list_file.py
@@ -19,7 +19,8 @@ def test_read_only_list_file():
     assert len(_read_only) == 0
 
     with open(FILE_NAME, "w") as fp:
-        fp.writelines(line + '\n' for line in ["one", "two", "three"])
+        for line in ["one", "two", "three"]:
+            fp.write(line + '\n')
 
     assert len(_read_only) == 3
     assert set(_read_only) == {"one", "two", "three"}