diff --git a/clang/test/Preprocessor/define_target.c b/clang/test/Preprocessor/define_target.c
new file mode 100644
index 000000000000..85a132f55766
--- /dev/null
+++ b/clang/test/Preprocessor/define_target.c
@@ -0,0 +1,27 @@
+// Note that the run lines are at the bottom of this file.
+
+#define_target TEST1
+TEST1   // diagnose
+
+#define_target TEST2
+#undef TEST2
+TEST2   // no diagnose
+
+#define_target TEST3
+#define TEST3
+TEST3   // no diagnose
+
+#define TEST4
+#define_target TEST4
+TEST4   // diagnose
+
+
+// check success:
+// RUN: clang -Eonly %s &&
+
+// Check proper # of notes is emitted.
+// RUN: clang -Eonly %s 2>&1 | grep note | wc -l | grep 2 &&
+
+// Check that the diagnostics are the right ones.
+// RUN: clang %s -Eonly -fno-caret-diagnostics 2>&1 | grep ':4:1: note' &&
+// RUN: clang %s -Eonly -fno-caret-diagnostics 2>&1 | grep ':16:1: note'