diff --git a/tests/unit/test_io_hdf5_h5tools.py b/tests/unit/test_io_hdf5_h5tools.py
index 898a05fe2..d382bcddc 100644
--- a/tests/unit/test_io_hdf5_h5tools.py
+++ b/tests/unit/test_io_hdf5_h5tools.py
@@ -830,7 +830,7 @@ def test_roundtrip_TermSetWrapper_dataset(self):
         foo = Foo(name="species", attr1='attr1', attr2=0,
                   my_data=TermSetWrapper(value=['Homo sapiens', 'Mus musculus'],
                                                          termset=terms))
-                                                         
+
         foobucket = FooBucket('bucket1', [foo])
         foofile = FooFile(buckets=[foobucket])