diff --git a/test/cpp/qps/qps_diff.py b/test/cpp/qps/qps_diff.py
index 9db5f731942..a95f9b899ae 100755
--- a/test/cpp/qps/qps_diff.py
+++ b/test/cpp/qps/qps_diff.py
@@ -124,7 +124,7 @@ def diff(scenarios, loops, old, new):
   for sn in scenarios:
     mdn_diff = abs(_median(new_data[sn]) - _median(old_data[sn]))
     print('%s: %s=%r %s=%r mdn_diff=%r' % (sn, new, new_data[sn], old, old_data[sn], mdn_diff))
-    s = bm_speedup.speedup(new_data[sn], old_data[sn])
+    s = bm_speedup.speedup(new_data[sn], old_data[sn], 10e-5)
     if abs(s) > 3 and mdn_diff > 0.5:
       rows.append([sn, '%+d%%' % s])