diff --git a/tests/neg/4382.scala b/tests/neg/4382.scala
new file mode 100644
index 000000000000..e1be23f29b99
--- /dev/null
+++ b/tests/neg/4382.scala
@@ -0,0 +1,3 @@
+trait x0[x0[_]] {
+  (??? : x0[_]): x0[Int] // error
+}