diff --git a/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/datacite/DataciteToOAFTest.scala b/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/datacite/DataciteToOAFTest.scala
index ca1dbc665..136b0fb93 100644
--- a/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/datacite/DataciteToOAFTest.scala
+++ b/dhp-workflows/dhp-aggregation/src/test/scala/eu/dnetlib/dhp/datacite/DataciteToOAFTest.scala
@@ -70,6 +70,9 @@ class DataciteToOAFTest extends AbstractVocabularyTest {
 
     assertEquals(100, nativeSize)
 
+    spark.read.load(targetPath).printSchema();
+
+
     val result: Dataset[Oaf] = spark.read.load(targetPath).as[Oaf]
 
     result