diff --git a/tests/regression_tests/surface_source/test.py b/tests/regression_tests/surface_source/test.py
index 4c6527783a..492ef192e9 100644
--- a/tests/regression_tests/surface_source/test.py
+++ b/tests/regression_tests/surface_source/test.py
@@ -10,6 +10,7 @@ from tests.testing_harness import PyAPITestHarness
 
 @pytest.fixture
 def model(request):
+    openmc.reset_auto_ids()
     marker = request.node.get_closest_marker("surf_source_op")
     surf_source_op = marker.args[0]