Update modules/common/src/test/scala/com.snowplowanalytics.snowplow.e…

…nrich.common/EtlPipelineSpec.scala

Co-authored-by: Anton Parkhomenko <chuwy@users.noreply.github.com>

modules/common/src/test/scala/com.snowplowanalytics.snowplow.enrich.common/EtlPipelineSpec.scala

@@ -103,6 +103,7 @@ class EtlPipelineSpec extends Specification with ValidatedMatchers {
       invalidCollectorPayload
     ) must be like {
       case Validated.Invalid(_: BadRow.CPFormatViolation) :: Nil => ok
+      case other => ko(s"One invalid CPFormatViolation expected, got ${other}")
     }
   }