diff --git a/datastore_server/dist/etc/service.properties b/datastore_server/dist/etc/service.properties
index 5fcadf58078bef284c6d871ff09e3c9971f514d2..3ed4a1700ba4d0e182f881d686730445512cc2ad 100644
--- a/datastore_server/dist/etc/service.properties
+++ b/datastore_server/dist/etc/service.properties
@@ -428,3 +428,5 @@ ftp.server.dataset.show-parents-and-children = true
 # hidden and FTP users will not see them.
 # Example (will only show PNG files for data sets of type HCS_IMAGE): 
 # ftp.server.dataset.filelist.filter.HCS_IMAGE= .*png
+
+jython-version=2.7
diff --git a/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/datastore_server/etc/service.properties b/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/datastore_server/etc/service.properties
index 2890dd8a540ca8c25c578b539fcda279d0521298..103e1adf37121e59d3a50a5be02738cd5569f30f 100644
--- a/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/datastore_server/etc/service.properties
+++ b/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/datastore_server/etc/service.properties
@@ -9,3 +9,5 @@ imaging-db.basicDatabaseName = imaging
 imaging-db.databaseKind = barkind
 imaging-db.scriptFolder = source/sql/imaging
 
+
+jython-version=2.7
diff --git a/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/openBIS-server/jetty/etc/service.properties b/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/openBIS-server/jetty/etc/service.properties
index a378970052eb9dd54f5b2b7bbc458491abf2aace..00b882b7214d4bdbcdb8563cab88bad8bb9940e0 100644
--- a/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/openBIS-server/jetty/etc/service.properties
+++ b/datastore_server/resource/test-data/BackupDatabaseDescriptionGeneratorTest/openBIS-server/jetty/etc/service.properties
@@ -15,3 +15,5 @@ database.owner =
 database.owner-password =
 database.admin-user = 
 database.admin-password =
+
+jython-version=2.7