diff --git a/tests/run.py b/tests/run.py
index 2144d96c7544..1d84a2999662 100755
--- a/tests/run.py
+++ b/tests/run.py
@@ -78,7 +78,7 @@ def run(test,
     if perf_run:
         slowdown = emulated_time / native_time
         print("Slowdown: %s" % round(slowdown, 1))
-        assert slowdown < 70
+        assert slowdown < 140
 
     if expected_inputs > 0:
         testcases = glob.glob(WORKDIR + "/tests/test_*.dat")