diff --git a/tests/regression_tests/microxs/test.py b/tests/regression_tests/microxs/test.py
index dbfe3357b..f92f61479 100644
--- a/tests/regression_tests/microxs/test.py
+++ b/tests/regression_tests/microxs/test.py
@@ -4,9 +4,10 @@ from pathlib import Path
 import numpy as np
 import pytest
 import openmc
-
 from openmc.deplete import MicroXS
 
+from tests.regression_tests import config
+
 CHAIN_FILE = Path(__file__).parents[2] / "chain_simple.xml"
 
 @pytest.fixture(scope="module")
@@ -46,7 +47,10 @@ def model():
 
 
 def test_from_model(model):
-    ref_xs = MicroXS.from_csv('test_reference.csv')
     test_xs = MicroXS.from_model(model, model.materials[0], CHAIN_FILE)
+    if config['update']:
+        test_xs.to_csv('test_reference.csv')
+
+    ref_xs = MicroXS.from_csv('test_reference.csv')
 
     np.testing.assert_allclose(test_xs, ref_xs, rtol=1e-11)