diff --git a/tests/eko/runner/test_parts.py b/tests/eko/runner/test_parts.py
new file mode 100644
index 000000000..39c3bc843
--- /dev/null
+++ b/tests/eko/runner/test_parts.py
@@ -0,0 +1,22 @@
+from eko.runner import parts
+
+
+def test_evolve_configs(eko_factory):
+    # QCD@LO
+    e10 = eko_factory.get()
+    assert e10.theory_card.order == (1, 0)
+    p10 = parts.evolve_configs(e10)
+    assert p10["matching_order"] == (0, 0)
+    # QCD@N3LO + QED@N2LO w/o matching_order
+    eko_factory.theory.order = (4, 3)
+    eko_factory.theory.matching_order = None
+    e43 = eko_factory.get({})
+    assert e43.theory_card.order == (4, 3)
+    p43 = parts.evolve_configs(e43)
+    assert p43["matching_order"] == (3, 2)
+    # QCD@N3LO + QED@N2LO w/ matching_order
+    eko_factory.theory.matching_order = (3, 0)
+    e43b = eko_factory.get({})
+    assert e43b.theory_card.order == (4, 3)
+    p43b = parts.evolve_configs(e43b)
+    assert p43b["matching_order"] == (3, 0)