diff --git a/test-kit/src/test/scala/HistoryTest.scala b/test-kit/src/test/scala/HistoryTest.scala
index 2713c2242..d3092244e 100644
--- a/test-kit/src/test/scala/HistoryTest.scala
+++ b/test-kit/src/test/scala/HistoryTest.scala
@@ -2,7 +2,7 @@ package chess
 
 class ThreefoldRepetitionTest extends ChessTest:
 
-  def toHash(a: Int) = PositionHash(Hash(a))
+  def toHash(a: Int) = PositionHash(Hash(a << 8))
   def makeHistory(positions: List[Int]) =
     (positions
       .map(toHash))