diff --git a/core/src/test/scala/shapeless/hlist.scala b/core/src/test/scala/shapeless/hlist.scala
index 121c98f81..674be262a 100644
--- a/core/src/test/scala/shapeless/hlist.scala
+++ b/core/src/test/scala/shapeless/hlist.scala
@@ -1906,6 +1906,7 @@ class HListTests {
 
     val is = l match {
       case i :: true :: s :: 2.0 :: HNil => (i, s)
+      case _ => sys.error("Not matched")
     }
 
     assertTypedEquals[Int](1, is._1)