diff --git a/tests/test_environment/test_environment.py b/tests/test_environment/test_environment.py
index 64487b8c3..10e985843 100644
--- a/tests/test_environment/test_environment.py
+++ b/tests/test_environment/test_environment.py
@@ -41,11 +41,12 @@ def test_config_status(make_app, app_params):
     # incremental build (config entry changed)
     app3 = make_app(*args, confoverrides={'root_doc': 'indexx'}, **kwargs)
     fname = app3.srcdir / 'index.rst'
+    other_fname = app3.srcdir / 'indexx.rst'
     assert fname.is_file()
-    shutil.move(fname, fname[:-4] + 'x.rst')
+    shutil.move(fname, other_fname)
     assert app3.env.config_status == CONFIG_CHANGED
     app3.build()
-    shutil.move(fname[:-4] + 'x.rst', fname)
+    shutil.move(other_fname, fname)
     output = strip_colors(app3.status.getvalue())
     assert 'The configuration has changed' in output
     assert "[config changed ('master_doc')] 1 added," in output
diff --git a/tests/test_util/test_util_i18n.py b/tests/test_util/test_util_i18n.py
index 973b054a1..d5ee52fb1 100644
--- a/tests/test_util/test_util_i18n.py
+++ b/tests/test_util/test_util_i18n.py
@@ -19,16 +19,16 @@ def test_catalog_info_for_file_and_path():
     cat = i18n.CatalogInfo('path', 'domain', 'utf-8')
     assert cat.po_file == 'domain.po'
     assert cat.mo_file == 'domain.mo'
-    assert cat.po_path == str(Path('path', 'domain.po'))
-    assert cat.mo_path == str(Path('path', 'domain.mo'))
+    assert cat.po_path == Path('path', 'domain.po')
+    assert cat.mo_path == Path('path', 'domain.mo')
 
 
 def test_catalog_info_for_sub_domain_file_and_path():
     cat = i18n.CatalogInfo('path', 'sub/domain', 'utf-8')
     assert cat.po_file == 'sub/domain.po'
     assert cat.mo_file == 'sub/domain.mo'
-    assert cat.po_path == str(Path('path', 'sub', 'domain.po'))
-    assert cat.mo_path == str(Path('path', 'sub', 'domain.mo'))
+    assert cat.po_path == Path('path', 'sub', 'domain.po')
+    assert cat.mo_path == Path('path', 'sub', 'domain.mo')
 
 
 def test_catalog_outdated(tmp_path):
@@ -178,8 +178,8 @@ def test_CatalogRepository(tmp_path):
     # for language xx
     repo = i18n.CatalogRepository(tmp_path, ['loc1', 'loc2'], 'xx', 'utf-8')
     assert list(repo.locale_dirs) == [
-        str(tmp_path / 'loc1'),
-        str(tmp_path / 'loc2'),
+        tmp_path / 'loc1',
+        tmp_path / 'loc2',
     ]
     assert all(isinstance(c, i18n.CatalogInfo) for c in repo.catalogs)
     assert sorted(c.domain for c in repo.catalogs) == [