diff --git a/cc/testing.go b/cc/testing.go
index bf806bc..f0ad33b 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -265,6 +265,7 @@
 		"bar.c":       nil,
 		"a.proto":     nil,
 		"b.aidl":      nil,
+		"sub/c.aidl":  nil,
 		"my_include":  nil,
 		"foo.map.txt": nil,
 		"liba.so":     nil,