diff --git a/tests/pos/i8424.scala b/tests/pos/i8424.scala
new file mode 100644
index 000000000000..f557e32e9326
--- /dev/null
+++ b/tests/pos/i8424.scala
@@ -0,0 +1,9 @@
+
+trait T
+trait U
+
+class Test(x: Any)(using val t: T = ???)(using val u: U = ???, disregard: Any = ???)
+
+object Test {
+  def apply() = new Test(???)
+}