diff --git a/tests/test_backup.py b/tests/test_backup.py
index f2d2fd43372b76935a697bd453f58aaf32797c24..6084d5d1afe45a08b469175c990f385a75d05a33 100755
--- a/tests/test_backup.py
+++ b/tests/test_backup.py
@@ -60,7 +60,7 @@ def test_backup_space(server):
             print('There is less than 20% of available space for backups')
             return False
         else:
-            print('There is %s%% of free space' % used_perc)
+            print('There is %s%% of free space' % (100 - used_perc))
             return True
     else:
         print('Failed to check backup space')