diff --git a/cc/testing.go b/cc/testing.go
index be020c5..edbb24d 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -496,6 +496,7 @@
 		"my_include":  nil,
 		"foo.map.txt": nil,
 		"liba.so":     nil,
+		"libb.a":      nil,
 	}
 
 	GatherRequiredFilesForTest(mockFS)