diff --git a/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/jython/api/v1/impl/MasterDataRegistrationHelper.java b/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/jython/api/v1/impl/MasterDataRegistrationHelper.java
index 902624079cf5075323364855112fb1b6e2622745..e8d3edbc8174e399986a93c9891b55eb50606541 100644
--- a/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/jython/api/v1/impl/MasterDataRegistrationHelper.java
+++ b/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/jython/api/v1/impl/MasterDataRegistrationHelper.java
@@ -24,7 +24,14 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.UUID;
 import java.util.stream.Collectors;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
@@ -100,7 +107,7 @@ public class MasterDataRegistrationHelper {
                 .toArray(String[]::new);
     }
 
-    protected String[] uploadToAsSessionWorkspace(final String sessionToken, final String... relativeFilePaths) throws IOException
+    public String[] uploadToAsSessionWorkspace(final String sessionToken, final String... relativeFilePaths) throws IOException
     {
         final String[] canonicalFilePaths = getFilePaths(relativeFilePaths);
         final ISessionWorkspaceProvider sessionWorkspaceProvider = CommonServiceProvider.getSessionWorkspaceProvider();