diff --git a/test/Frontend/cpp-output.c b/test/Frontend/cpp-output.c
new file mode 100644
index 0000000..e44095b
--- /dev/null
+++ b/test/Frontend/cpp-output.c
@@ -0,0 +1,14 @@
+// RUN: %clang -E -o %t -C %s
+// RUN: grep '^int x; // comment' %t
+// RUN: grep '^x x' %t
+// RUN: %clang -E -o %t -CC %s
+// RUN: grep '^int x; // comment' %t
+// RUN: grep '^x /\* comment \*/ x /\* comment \*/' %t
+
+int x; // comment
+
+#define A(foo, bar) foo bar
+#define B x // comment 
+
+A(B, B)
+