diff --git a/tools/test.py b/tools/test.py
index 2c2a4d78d80a..ee67da897bfc 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -1849,7 +1849,7 @@ def should_keep(case):
     print()
     sys.stderr.write("--- Total time: %s ---\n" % FormatTime(duration))
     timed_tests = [ t for t in cases_to_run if not t.duration is None ]
-    timed_tests.sort(key=lambda x: x.duration)
+    timed_tests.sort(key=lambda x: x.duration, reverse=True)
     for i, entry in enumerate(timed_tests[:20], start=1):
       t = FormatTimedelta(entry.duration)
       sys.stderr.write("%4i (%s) %s\n" % (i, t, entry.GetLabel()))