diff --git a/artiq/test/coredevice/test_ad9910.py b/artiq/test/coredevice/test_ad9910.py
index 52d1c5be4..407755df6 100644
--- a/artiq/test/coredevice/test_ad9910.py
+++ b/artiq/test/coredevice/test_ad9910.py
@@ -1,5 +1,3 @@
-import unittest
-
 from artiq.experiment import *
 from artiq.test.hardware_testbench import ExperimentCase
 from artiq.coredevice.ad9910 import _AD9910_REG_FTW
diff --git a/artiq/test/coredevice/test_urukul.py b/artiq/test/coredevice/test_urukul.py
index 34b2fd128..2141303c4 100644
--- a/artiq/test/coredevice/test_urukul.py
+++ b/artiq/test/coredevice/test_urukul.py
@@ -1,5 +1,3 @@
-import unittest
-
 from artiq.experiment import *
 from artiq.test.hardware_testbench import ExperimentCase
 from artiq.coredevice import urukul