diff --git a/trytond/tryton.rnc b/trytond/tryton.rnc
index c8d0e2766b..f7def341b9 100644
--- a/trytond/tryton.rnc
+++ b/trytond/tryton.rnc
@@ -8,6 +8,7 @@ attlist.data &=
 attlist.data &=
   [ a:defaultValue = "0" ] attribute grouped { "0" | "1" }?
 attlist.data &= attribute depends { text }?
+attlist.data &= attribute skiptest { "0" | "1" }?
 record = element record { attlist.record, field* }
 attlist.record &= attribute model { text }
 attlist.record &= attribute id { text }
diff --git a/trytond/tryton.rng b/trytond/tryton.rng
index 8ee0abd185..8dafde0535 100644
--- a/trytond/tryton.rng
+++ b/trytond/tryton.rng
@@ -55,6 +55,17 @@
       </attribute>
     </optional>
   </define>
+  <define name="attlist.data" combine="interleave">
+    <optional>
+      <attribute>
+        <name ns="">skiptest</name>
+        <choice>
+          <value>0</value>
+          <value>1</value>
+        </choice>
+      </attribute>
+    </optional>
+  </define>
   <define name="record">
     <element>
       <name ns="">record</name>