diff --git a/tests/test_deprecated.rs b/tests/test_deprecated.rs
new file mode 100644
index 0000000..5524666
--- /dev/null
+++ b/tests/test_deprecated.rs
@@ -0,0 +1,10 @@
+#![deny(deprecated, clippy::all, clippy::pedantic)]
+
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[deprecated]
+    #[error("...")]
+    Deprecated,
+}