diff --git a/sklearn/utils/tests/test_cython_templating.py b/sklearn/utils/tests/test_cython_templating.py
index 572d1db523cf8..eeb8319e07415 100644
--- a/sklearn/utils/tests/test_cython_templating.py
+++ b/sklearn/utils/tests/test_cython_templating.py
@@ -10,11 +10,11 @@ def test_files_generated_by_templates_are_git_ignored():
         pytest.skip("Tests are not run from the source folder")
 
     base_dir = pathlib.Path(sklearn.__file__).parent
-    ignored_files = open(gitignore_file, "r").readlines()
-    ignored_files = list(map(lambda line: line.strip("\n"), ignored_files))
+    ignored_files = gitignore_file.read_text().split("\n")
+    ignored_files = [pathlib.Path(line) for line in ignored_files]
 
     for filename in base_dir.glob("**/*.tp"):
         filename = filename.relative_to(base_dir.parent)
         # From "path/to/template.p??.tp" to "path/to/template.p??"
         filename_wo_tempita_suffix = filename.with_suffix("")
-        assert str(filename_wo_tempita_suffix) in ignored_files
+        assert filename_wo_tempita_suffix in ignored_files