diff --git a/apps/wpm/filters.py b/apps/wpm/filters.py
index e22468ea..51939be7 100644
--- a/apps/wpm/filters.py
+++ b/apps/wpm/filters.py
@@ -48,7 +48,8 @@ class WMaterialFilter(filters.FilterSet):
             "mgroup": ["exact", "in", "isnull"],
             "mgroup__name": ["exact", "in"],
             "count": ["gte", "lte", "exact"],
-            "notok_sign": ["exact", "in", "isnull"]
+            "notok_sign": ["exact", "in", "isnull"],
+            "count_xtest": ["gte", "isnull"]
         }
 
 class MlogFilter(filters.FilterSet):