diff --git a/tests/unit_tests/test_lib.py b/tests/unit_tests/test_lib.py
index 2f02d7ea9..53fd217bd 100644
--- a/tests/unit_tests/test_lib.py
+++ b/tests/unit_tests/test_lib.py
@@ -346,6 +346,8 @@ def test_set_n_batches(lib_run):
 
     # n_active should have been overwritten from 5 to 15
     assert openmc.lib.num_realizations() == 15
+
+    # Ensure statepoint created at new value of n_batches
     assert os.path.exists('statepoint.20.h5')