diff --git a/main-command/src/main/scala/sbt/internal/client/BspClient.scala b/main-command/src/main/scala/sbt/internal/client/BspClient.scala
index 613e5de96..c9942ba99 100644
--- a/main-command/src/main/scala/sbt/internal/client/BspClient.scala
+++ b/main-command/src/main/scala/sbt/internal/client/BspClient.scala
@@ -15,8 +15,8 @@ import sbt.Exit
 import sbt.io.syntax._
 import sbt.protocol.ClientSocket
 
-import scala.sys.process.Process
 import scala.util.control.NonFatal
+import java.lang.ProcessBuilder.Redirect
 
 class BspClient private (sbtServer: Socket) {
   private def run(): Exit = Exit(BspClient.bspRun(sbtServer))
@@ -90,8 +90,15 @@ object BspClient {
    * This instance must be shutdown explicitly via `sbt -client shutdown`
    */
   def forkServer(baseDirectory: File, portfile: File): Unit = {
-    val args = List[String]()
-    val launchOpts = List("-Xms2048M", "-Xmx2048M", "-Xss2M")
+    val args = List("--detach-stdio")
+    val launchOpts = List(
+      "-Dfile.encoding=UTF-8",
+      "-Dsbt.io.virtual=true",
+      "-Xms1024M",
+      "-Xmx1024M",
+      "-Xss4M",
+      "-XX:ReservedCodeCacheSize=128m"
+    )
 
     val launcherJarString = sys.props.get("java.class.path") match {
       case Some(cp) =>
@@ -102,10 +109,15 @@ object BspClient {
     }
 
     val cmd = "java" :: launchOpts ::: "-jar" :: launcherJarString :: args
-    val process = Process(cmd, baseDirectory).run()
+    val processBuilder =
+      new ProcessBuilder(cmd: _*)
+        .directory(baseDirectory)
+        .redirectInput(Redirect.PIPE)
 
-    while (process.isAlive() && !portfile.exists) Thread.sleep(100)
+    val process = processBuilder.start()
 
-    if (!process.isAlive()) sys.error("sbt server exited")
+    while (process.isAlive && !portfile.exists) Thread.sleep(100)
+
+    if (!process.isAlive) sys.error("sbt server exited")
   }
 }
diff --git a/main/src/main/scala/sbt/ScriptedPlugin.scala b/main/src/main/scala/sbt/ScriptedPlugin.scala
index 2d79de76b..aece10240 100644
--- a/main/src/main/scala/sbt/ScriptedPlugin.scala
+++ b/main/src/main/scala/sbt/ScriptedPlugin.scala
@@ -16,6 +16,7 @@ import sbt.nio.Keys._
 import sbt.Project._
 import sbt.internal.inc.ModuleUtilities
 import sbt.internal.inc.classpath.ClasspathUtil
+import sbt.internal.librarymanagement.cross.CrossVersionUtil
 import sbt.internal.util.complete.{ DefaultParsers, Parser }
 import sbt.io._
 import sbt.io.syntax._
@@ -78,7 +79,7 @@ object ScriptedPlugin extends AutoPlugin {
     scriptedClasspath := getJars(ScriptedConf).value,
     scriptedTests := scriptedTestsTask.value,
     scriptedParallelInstances := 1,
-    scriptedBatchExecution := true,
+    scriptedBatchExecution := CrossVersionUtil.binarySbtVersion(scriptedSbt.value) != "0.13",
     scriptedRun := scriptedRunTask.value,
     scriptedDependencies := {
       def use[A](@deprecated("unused", "") x: A*): Unit = () // avoid unused warnings
diff --git a/sbt/src/sbt-test/project/scripted13/build.sbt b/sbt/src/sbt-test/project/scripted13/build.sbt
index 8a7182a4c..fd2fa6ebe 100644
--- a/sbt/src/sbt-test/project/scripted13/build.sbt
+++ b/sbt/src/sbt-test/project/scripted13/build.sbt
@@ -1,5 +1 @@
-lazy val root = (project in file("."))
-  .settings(
-    sbtPlugin := true,
-    resolvers += Resolver.typesafeIvyRepo("releases")
-  )
+enablePlugins(SbtPlugin)
diff --git a/sbt/src/sbt-test/project/scripted13/project/plugins.sbt b/sbt/src/sbt-test/project/scripted13/project/plugins.sbt
index a2a45d929..217d3d1a5 100644
--- a/sbt/src/sbt-test/project/scripted13/project/plugins.sbt
+++ b/sbt/src/sbt-test/project/scripted13/project/plugins.sbt
@@ -1,5 +1 @@
-libraryDependencies += {
-   "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value
-}
-
 offline := true
diff --git a/sbt/src/sbt-test/project/scripted13/disabled b/sbt/src/sbt-test/project/scripted13/test
similarity index 88%
rename from sbt/src/sbt-test/project/scripted13/disabled
rename to sbt/src/sbt-test/project/scripted13/test
index 7cf13e886..1617a03a4 100644
--- a/sbt/src/sbt-test/project/scripted13/disabled
+++ b/sbt/src/sbt-test/project/scripted13/test
@@ -1,7 +1,6 @@
 # This tests that this sbt scripted plugin can launch the previous one
 
-> ++2.10.6
-> ^^0.13.16-M1
+> ^^0.13.18
 
 $ copy-file changes/A.scala src/sbt-test/a/b/A.scala
 > scripted