diff --git a/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala b/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala
index 44c82e256..c4aa64fd4 100644
--- a/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala
+++ b/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala
@@ -1025,6 +1025,7 @@ case object Crossref2Oaf {
             tp._1 match {
               case "electronic" => journal.setIssnOnline(tp._2)
               case "print"      => journal.setIssnPrinted(tp._2)
+              case _            =>
             }
           })
         }
diff --git a/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/crossref/issn_pub.json b/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/crossref/issn_pub.json
index 2a9e391df..2f1af2a6e 100644
--- a/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/crossref/issn_pub.json
+++ b/dhp-workflows/dhp-aggregation/src/test/resources/eu/dnetlib/dhp/collection/crossref/issn_pub.json
@@ -789,10 +789,6 @@
       "value": "2227-9717",
       "type": "electronic"
     },
-    {
-      "value": "VALUE",
-      "type": "PIPPO"
-    },
     {
       "value": "1063-4584",
       "type": "pu"
diff --git a/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/collection/crossref/CrossrefMappingTest.scala b/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/collection/crossref/CrossrefMappingTest.scala
index ed43bb1a1..c3ea884eb 100644
--- a/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/collection/crossref/CrossrefMappingTest.scala
+++ b/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/collection/crossref/CrossrefMappingTest.scala
@@ -2,7 +2,9 @@ package eu.dnetlib.dhp.collection.crossref
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import eu.dnetlib.dhp.aggregation.AbstractVocabularyTest
-import org.junit.jupiter.api.BeforeEach
+import eu.dnetlib.dhp.collection.crossref.Crossref2Oaf.TransformationType
+import org.apache.commons.io.IOUtils
+import org.junit.jupiter.api.{BeforeEach, Test}
 import org.junit.jupiter.api.extension.ExtendWith
 import org.mockito.junit.jupiter.MockitoExtension
 import org.slf4j.{Logger, LoggerFactory}
@@ -18,4 +20,13 @@ class CrossrefMappingTest extends AbstractVocabularyTest {
     super.setUpVocabulary()
   }
 
+  @Test
+  def mappingRecord(): Unit = {
+    val input =
+      IOUtils.toString(getClass.getResourceAsStream("/eu/dnetlib/dhp/collection/crossref/issn_pub.json"), "utf-8")
+
+    println(Crossref2Oaf.convert(input, vocabularies, TransformationType.All))
+
+  }
+
 }