diff --git a/tst/test_rep.sh b/tst/test_rep.sh
index c683d87..d12aecd 100755
--- a/tst/test_rep.sh
+++ b/tst/test_rep.sh
@@ -40,8 +40,8 @@ else
 
     # remove empty dirs from both directiories to make diff work
 
-    find master_library -empty -type d -delete
-    find session_library -empty -type d -delete
+    find $master_library -empty -type d -delete
+    find $session_library -empty -type d -delete
 
     diff -r $master_library $session_library