1 files changed, 16 insertions, 0 deletions
diff --git a/tests/patmat/t9399.scala b/tests/patmat/t9399.scala
new file mode 100644
index 000000000..89dbedd96
--- /dev/null
+++ b/tests/patmat/t9399.scala
@@ -0,0 +1,16 @@
+sealed abstract class TA
+sealed abstract class TB extends TA
+case object A extends TA
+case object B extends TB
+
+sealed trait C
+case class CTA(id: Int, da: TA) extends C
+case class CTB(id: Int, da: TB) extends C
+
+object Test {
+  val test: C => Unit = {
+    case CTA(_, A) =>
+    case CTA(_, B) =>
+    case CTB(_, B) =>
+  }
+}