1 files changed, 4 insertions, 0 deletions
diff --git a/test/files/scalacheck/parallel-collections/IntOperators.scala b/test/files/scalacheck/parallel-collections/IntOperators.scala
index 24330d7670..4a74b91da8 100644
--- a/test/files/scalacheck/parallel-collections/IntOperators.scala
+++ b/test/files/scalacheck/parallel-collections/IntOperators.scala
@@ -60,6 +60,10 @@ trait IntOperators extends Operators[Int] {
     Array.fill(1000)(1).toSeq
   )
   def newArray(sz: Int) = new Array[Int](sz)
+  def groupByFunctions = List(
+    _ % 2, _ % 3, _ % 5, _ % 10, _ % 154, _% 3217,
+    _ * 2, _ + 1
+  )
 }