diff --git a/artiq/test/coredevice/test_phaser.py b/artiq/test/coredevice/test_phaser.py
index 18aac6a57..4f23f67db 100644
--- a/artiq/test/coredevice/test_phaser.py
+++ b/artiq/test/coredevice/test_phaser.py
@@ -1,7 +1,7 @@
 import unittest
 from artiq.experiment import *
 from artiq.test.hardware_testbench import ExperimentCase
-from artiq.language.core import kernel, delay
+from artiq.language.core import kernel
 from artiq.language.units import us