diff --git a/testing/regress/ecl/dfucopy.ecl b/testing/regress/ecl/dfusupercopy.ecl
similarity index 90%
rename from testing/regress/ecl/dfucopy.ecl
rename to testing/regress/ecl/dfusupercopy.ecl
index 536d4d74690..85156773c96 100644
--- a/testing/regress/ecl/dfucopy.ecl
+++ b/testing/regress/ecl/dfusupercopy.ecl
@@ -18,7 +18,7 @@
 //noroxie
 //nohthor
 
-import Std.System;
+import Std.System.Thorlib;
 import Std.File AS FileServices;
 import $.setup;
 prefix := setup.Files(false, false).QueryFilePrefix;
@@ -28,10 +28,6 @@ layout_user := RECORD
    STRING20 user;
 END;
 
-layout_names := RECORD
-   STRING30 name;
-END;
-
 ds1 := DATASET([{'Ned'},{'Robert'}, {'Jaime'}, {'Catelyn'}, {'Cersei'}, {'Daenerys'}, {'Jon'}], layout_user, DISTRIBUTED );
 ds2 := DATASET([{'Sansa'}, {'Arya'}, {'Robb'}, {'Theon'}, {'Bran'}, {'Joffrey'}, {'Hound'}, {'Tyrion'}], layout_user, DISTRIBUTED);
 ds3 := DATASET([{'Arya'}, {'Robb'}, {'Theon'}, {'Bran'}, {'Joffrey'}, {'Hound'}, {'Tyrion'}], layout_user, DISTRIBUTED);
@@ -46,12 +42,10 @@ SEQUENTIAL(
     FileServices.AddSuperFile(prefix + 'superdata', prefix + 'subdata2'),
     FileServices.AddSuperFile(prefix + 'superdata', prefix + 'subdata3'),
     FileServices.FinishSuperFileTransaction(),
-    FileServices.Copy(sourceLogicalName := prefix + 'superdata', destinationGroup := 'mythor', destinationLogicalName := prefix + 'super_copy', ALLOWOVERWRITE := true),
+    FileServices.Copy(sourceLogicalName := prefix + 'superdata', destinationGroup := Thorlib.group(), destinationLogicalName := prefix + 'super_copy', ALLOWOVERWRITE := true),
     FileServices.DeleteLogicalFile(prefix + 'super_copy', true),
-    FileServices.DeleteOwnedSubFiles(prefix + 'superdata'),
+    FileServices.DeleteLogicalFile(prefix + 'superdata', true),
     FileServices.DeleteLogicalFile(prefix + 'subdata1', true),
     FileServices.DeleteLogicalFile(prefix + 'subdata2', true),
     FileServices.DeleteLogicalFile(prefix + 'subdata3', true),
-    FileServices.DeleteLogicalFile(prefix + 'superdata', true),
 )
-
diff --git a/testing/regress/ecl/key/dfucopy.xml b/testing/regress/ecl/key/dfusupercopy.xml
similarity index 100%
rename from testing/regress/ecl/key/dfucopy.xml
rename to testing/regress/ecl/key/dfusupercopy.xml