diff --git a/tests/neg/i17192.5.scala b/tests/neg/i17192.5.scala
index 2837af36b573..a23c8b589a1a 100644
--- a/tests/neg/i17192.5.scala
+++ b/tests/neg/i17192.5.scala
@@ -1,6 +1,7 @@
 class Ifce[BT <: Boolean]:
   type RT = BT match
-    case true => this.type { val v1: Int }
+    case true  => this.type { val v1: Int }
+    case false => this.type
   def cast: RT = this.asInstanceOf[RT]
 
 class Test: