diff --git a/test/Preprocessor/comment_save_macro.c b/test/Preprocessor/comment_save_macro.c
new file mode 100644
index 0000000..635a6fd
--- /dev/null
+++ b/test/Preprocessor/comment_save_macro.c
@@ -0,0 +1,8 @@
+// RUN: clang -E -C %s | grep '^boo bork bar // zot$' &&
+// RUN: clang -E -CC %s | grep -F '^boo bork /* blah*/ bar // zot$' &&
+// RUN: clang -E %s | grep '^boo bork bar$'
+
+
+#define FOO bork // blah
+boo FOO bar // zot
+