diff --git a/testdata/primitives.dump b/testdata/primitives.dump
index f5c46fd..b7195ad 100644
--- a/testdata/primitives.dump
+++ b/testdata/primitives.dump
@@ -37,4 +37,7 @@
   nil,
   litter_test.CustomMap{},
   litter_test.CustomMap(nil),
+  chan string,
+  chan<- int64,
+  <-chan uint64,
 }
\ No newline at end of file