diff --git a/sbt/src/sbt-test/actions/doc-file-options/build.sbt b/sbt/src/sbt-test/actions/doc-file-options/build.sbt
index be9255579..2c56831c1 100644
--- a/sbt/src/sbt-test/actions/doc-file-options/build.sbt
+++ b/sbt/src/sbt-test/actions/doc-file-options/build.sbt
@@ -2,15 +2,16 @@ val newContents = "bbbbbbbbb"
 
 val rootContentFile = "root.txt"
 
-scalaVersion := "2.10.2"
+ThisBuild / scalaVersion := "2.12.8"
 
-scalacOptions in (Compile, doc) := Seq("-doc-root-content", rootContentFile)
-
-TaskKey[Unit]("changeRootContent") := {
-	IO.write(file(rootContentFile), newContents)
-}
-
-TaskKey[Unit]("check") := {
-	val packageHtml = (target in Compile in doc).value / "package.html"
-	assert(IO.read(packageHtml).contains(newContents), s"does not contains ${newContents} in ${packageHtml}" )
-}
+lazy val root = (project in file("."))
+  .settings(
+    Compile / doc / scalacOptions := Seq("-doc-root-content", rootContentFile),
+    TaskKey[Unit]("changeRootContent") := {
+      IO.write(file(rootContentFile), newContents)
+    },
+    TaskKey[Unit]("check") := {
+      val packageHtml = (Compile / doc / target).value / "index.html"
+      assert(IO.read(packageHtml).contains(newContents), s"does not contains ${newContents} in ${packageHtml}" )
+    }
+  )