diff --git a/tests/unit_tests/test_settings.py b/tests/unit_tests/test_settings.py
index 9c33f6a2d..c3ff72879 100644
--- a/tests/unit_tests/test_settings.py
+++ b/tests/unit_tests/test_settings.py
@@ -9,6 +9,8 @@ def test_export_to_xml(run_in_tmpdir):
     s.generations_per_batch = 10
     s.inactive = 100
     s.particles = 1000000
+    s.max_lost_particles = 5
+    s.rel_max_lost_particles = 1e-4
     s.keff_trigger = {'type': 'std_dev', 'threshold': 0.001}
     s.energy_mode = 'continuous-energy'
     s.max_order = 5
@@ -62,6 +64,8 @@ def test_export_to_xml(run_in_tmpdir):
     assert s.generations_per_batch == 10
     assert s.inactive == 100
     assert s.particles == 1000000
+    assert s.max_lost_particles == 5
+    assert s.rel_max_lost_particles == 1e-4
     assert s.keff_trigger == {'type': 'std_dev', 'threshold': 0.001}
     assert s.energy_mode == 'continuous-energy'
     assert s.max_order == 5