1 files changed, 9 insertions, 0 deletions
diff --git a/tests/ui/proc-macro/bang-macro.rs b/tests/ui/proc-macro/bang-macro.rs
new file mode 100644
index 00000000000..92810791314
--- /dev/null
+++ b/tests/ui/proc-macro/bang-macro.rs
@@ -0,0 +1,9 @@
+// run-pass
+// aux-build:bang-macro.rs
+
+extern crate bang_macro;
+use bang_macro::rewrite;
+
+fn main() {
+    assert_eq!(rewrite!("Hello, world!"), "NOT Hello, world!");
+}