diff --git a/build.sbt b/build.sbt
index 7ff99b8..5e763a2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ course := "progfun1"
 assignment := "example"
 name := course.value + "-" + assignment.value
 testSuite := "example.ListsSuite"
-scalaVersion := "0.19.0-bin-20190917-d821081-NIGHTLY"
+scalaVersion := "0.19.0-bin-20190918-dd68eb8-NIGHTLY"
 scalacOptions ++= Seq("-language:implicitConversions", "-deprecation")
 libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test
 
diff --git a/grading-tests.jar b/grading-tests.jar
index ffa1d53..9fbce2c 100644
Binary files a/grading-tests.jar and b/grading-tests.jar differ