diff --git a/tests/unit_tests/test_deplete_activation.py b/tests/unit_tests/test_deplete_activation.py
index 1842ad8ac..cef614f82 100644
--- a/tests/unit_tests/test_deplete_activation.py
+++ b/tests/unit_tests/test_deplete_activation.py
@@ -47,7 +47,7 @@ ENERGIES = np.logspace(log10(1e-5), log10(2e7), 100)
     ("direct", {}, 1e-5),
     ("flux", {'energies': ENERGIES}, 0.01),
     ("flux", {'energies': ENERGIES, 'reactions': ['(n,gamma)']}, 1e-5),
-    ("flux", {'energies': ENERGIES, 'reactions': ['(n,gamma)'], 'nuclides': ['W186']}, 1e-5),
+    ("flux", {'energies': ENERGIES, 'reactions': ['(n,gamma)'], 'nuclides': ['W186', 'H3']}, 1e-5),
 ])
 def test_activation(run_in_tmpdir, model, reaction_rate_mode, reaction_rate_opts, tolerance):
     # Determine (n.gamma) reaction rate using initial run