diff --git a/artiq/test/coredevice/test_cache.py b/artiq/test/coredevice/test_cache.py
index 717f68b34..368515e0b 100644
--- a/artiq/test/coredevice/test_cache.py
+++ b/artiq/test/coredevice/test_cache.py
@@ -1,4 +1,5 @@
 from artiq.experiment import *
+from artiq.coredevice.exceptions import CacheError
 from artiq.test.hardware_testbench import ExperimentCase