1 files changed, 9 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/builtin_type_shadow.rs b/src/tools/clippy/tests/ui/builtin_type_shadow.rs
new file mode 100644
index 000000000..69b8b6a0e
--- /dev/null
+++ b/src/tools/clippy/tests/ui/builtin_type_shadow.rs
@@ -0,0 +1,9 @@
+#![warn(clippy::builtin_type_shadow)]
+#![allow(non_camel_case_types)]
+
+fn foo<u32>(a: u32) -> u32 {
+    42
+    // ^ rustc's type error
+}
+
+fn main() {}