diff --git a/artiq/test/lit/inferencer/cast.py b/artiq/test/lit/inferencer/cast.py
index 0f9c4c8d9..be2ddbf4a 100644
--- a/artiq/test/lit/inferencer/cast.py
+++ b/artiq/test/lit/inferencer/cast.py
@@ -1,5 +1,8 @@
 # RUN: %python -m artiq.compiler.testbench.inferencer +mono %s >%t
 # RUN: OutputCheck %s --file-to-check=%t
 
-# CHECK-L: numpy.int64
+# CHECK-L: 2:numpy.int64
 int64(2)**32
+
+# CHECK-L: round:<function round>(1.0:float):numpy.int64
+int64(round(1.0))