diff --git a/clang-tools-extra/test/modularize/SubModule2.h b/clang-tools-extra/test/modularize/SubModule2.h
--- a/clang-tools-extra/test/modularize/SubModule2.h
+++ b/clang-tools-extra/test/modularize/SubModule2.h
@@ -1,3 +1,3 @@
-// SubModule2.h - Master header with same name as directory.
+// SubModule2.h - Main header with same name as directory.
 #include "SubModule2/Header3.h"
 #include "SubModule2/Header4.h"