diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguage.closuresExt.test/models/jetbrains.mps.baseLanguage.closuresExt.test.collections.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguage.closuresExt.test/models/jetbrains.mps.baseLanguage.closuresExt.test.collections.mps
index ec94111a..9a0ac0a8 100644
--- a/samples/mpscore/solutions/jetbrains.mps.baseLanguage.closuresExt.test/models/jetbrains.mps.baseLanguage.closuresExt.test.collections.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguage.closuresExt.test/models/jetbrains.mps.baseLanguage.closuresExt.test.collections.mps
@@ -1774,6 +1774,9 @@
                 <property role="1U20sK" value="error" />
               </node>
             </node>
+            <node concept="1U20sH" id="1uV2bz2gQc5" role="lGtFl">
+              <property role="1U20sK" value="error" />
+            </node>
           </node>
         </node>
       </node>