1 files changed, 13 insertions, 0 deletions
diff --git a/tests/ui/lint/lint-unknown-lint.rs b/tests/ui/lint/lint-unknown-lint.rs
new file mode 100644
index 00000000000..2d842d51420
--- /dev/null
+++ b/tests/ui/lint/lint-unknown-lint.rs
@@ -0,0 +1,13 @@
+#![deny(unknown_lints)]
+
+#![allow(not_a_real_lint)] //~ ERROR unknown lint
+
+#![deny(dead_cod)] //~ ERROR unknown lint
+                   //~| HELP did you mean
+                   //~| SUGGESTION dead_code
+
+#![deny(rust_2018_idiots)] //~ ERROR unknown lint
+                           //~| HELP did you mean
+                           //~| SUGGESTION rust_2018_idioms
+
+fn main() {}