diff --git a/python/tests/reference/ConfigMaterial/material.yaml b/python/tests/reference/ConfigMaterial/material.yaml
index 5c006c99c..97c6504bb 100644
--- a/python/tests/reference/ConfigMaterial/material.yaml
+++ b/python/tests/reference/ConfigMaterial/material.yaml
@@ -1,8 +1,10 @@
 homogenization:
   SX:
+    N_constituents: 2
     mech: {type: none}
   Taylor:
-    mech: {N_constituents: 2, type: isostrain}
+    N_constituents: 2
+    mech: {type: isostrain}
 
 material:
   - constituents: