diff --git a/anesthetic/_version.py b/anesthetic/_version.py
index a33997dd..b15121b0 100644
--- a/anesthetic/_version.py
+++ b/anesthetic/_version.py
@@ -1 +1 @@
-__version__ = '2.1.0'
+__version__ = '2.1.0'
\ No newline at end of file
diff --git a/tests/test_reader.py b/tests/test_reader.py
index ee85fecd..ad28313b 100644
--- a/tests/test_reader.py
+++ b/tests/test_reader.py
@@ -271,9 +271,9 @@ def test_regex_escape():
 @pytest.mark.parametrize('root', ['pc', 'gd'])
 @pytest.mark.skipif(pytables_imported is False,
                     reason="requires tables package")
-def test_hdf5(root):
+def test_hdf5(tmp_path, root):
     samples = read_chains('./tests/example_data/' + root)
-    filename = 'test_hdf5.h5'
+    filename = tmp_path / ('test_hdf5' + root + '.h5')
     key = "samples"
 
     with HDFStore(filename) as store: