diff --git a/artiq/test/coredevice/test_performance.py b/artiq/test/coredevice/test_performance.py
index 52433c744..e89fec585 100644
--- a/artiq/test/coredevice/test_performance.py
+++ b/artiq/test/coredevice/test_performance.py
@@ -44,7 +44,7 @@ class TransferTest(ExperimentCase):
         exp = self.create(_Transfer)
         host_to_device_rate = exp.host_to_device()
         print(host_to_device_rate, "B/s")
-        self.assertGreater(host_to_device_rate, 1.8e6)
+        self.assertGreater(host_to_device_rate, 1.6e6)
 
     @unittest.skipUnless(artiq_low_latency,
                          "timings are dependent on CPU load and network conditions")
@@ -52,7 +52,7 @@ class TransferTest(ExperimentCase):
         exp = self.create(_Transfer)
         device_to_host_rate = exp.device_to_host()
         print(device_to_host_rate, "B/s")
-        self.assertGreater(device_to_host_rate, 1.8e6)
+        self.assertGreater(device_to_host_rate, 1.6e6)
 
 
 class _KernelOverhead(EnvExperiment):