diff --git a/artiq/test/lit/escape/error_mutable_aug_asgn.py b/artiq/test/lit/escape/error_mutable_aug_asgn.py
index 1cdbd8838..ca4811768 100644
--- a/artiq/test/lit/escape/error_mutable_aug_asgn.py
+++ b/artiq/test/lit/escape/error_mutable_aug_asgn.py
@@ -6,7 +6,7 @@ from artiq.experiment import *
 @kernel
 def entrypoint():
     a = [1,2]
-    # CHECK-L: ${LINE:+2}: error: lists cannot be mutated in-place
+    # CHECK-L: ${LINE:+2}: error: values cannot be mutated in-place
     # CHECK-L: ${LINE:+1}: note: try using `a = a + [3,4]`
     a += [3,4]