1 files changed, 9 insertions, 0 deletions
diff --git a/tests/ui/lint/unused/unused-macro-with-bad-frag-spec.rs b/tests/ui/lint/unused/unused-macro-with-bad-frag-spec.rs
new file mode 100644
index 000000000..ce187047b
--- /dev/null
+++ b/tests/ui/lint/unused/unused-macro-with-bad-frag-spec.rs
@@ -0,0 +1,9 @@
+#![allow(unused_macros)]
+
+// Issue #21370
+
+macro_rules! test {
+    ($wrong:t_ty) => () //~ ERROR invalid fragment specifier `t_ty`
+}
+
+fn main() { }