package org.jetbrains.plugins.scala.base

import com.intellij.openapi.module.Module
import org.jetbrains.plugins.scala.TestFixtureProvider
import org.jetbrains.plugins.scala.base.libraryLoaders.LibraryLoader
import org.jetbrains.plugins.scala.debugger.{ScalaVersion, Scala_2_13}

import scala.collection.mutable
import scala.collection.mutable.ListBuffer

trait ScalaSdkOwner {

  implicit val version: ScalaVersion

  protected def librariesLoaders: Seq[LibraryLoader]

  protected lazy val myLoaders: ListBuffer[LibraryLoader] = mutable.ListBuffer.empty[LibraryLoader]

  protected def setUpLibraries(implicit module: Module): Unit = {

    librariesLoaders.foreach { loader =>
      myLoaders += loader
      loader.init
    }
  }

  protected def disposeLibraries(implicit module: Module): Unit = {
    myLoaders.foreach(_.clean)
    myLoaders.clear()
  }

}

// Java compatibility
trait DefaultScalaSdkOwner extends ScalaSdkOwner with TestFixtureProvider {
  override implicit val version: ScalaVersion = Scala_2_13
}

package org.jetbrains.plugins.scala.base

import com.intellij.openapi.module.Module
import org.jetbrains.plugins.scala.TestFixtureProvider
import org.jetbrains.plugins.scala.base.libraryLoaders.LibraryLoader
import org.jetbrains.plugins.scala.debugger.{ScalaVersion, Scala_2_10}

import scala.collection.mutable
import scala.collection.mutable.ListBuffer

trait ScalaSdkOwner {

  implicit val version: ScalaVersion

  protected def librariesLoaders: Seq[LibraryLoader]

  protected lazy val myLoaders: ListBuffer[LibraryLoader] = mutable.ListBuffer.empty[LibraryLoader]

  protected def setUpLibraries(implicit module: Module): Unit = {

    librariesLoaders.foreach { loader =>
      myLoaders += loader
      loader.init
    }
  }

  protected def disposeLibraries(implicit module: Module): Unit = {
    myLoaders.foreach(_.clean)
    myLoaders.clear()
  }

}

// Java compatibility
trait DefaultScalaSdkOwner extends ScalaSdkOwner with TestFixtureProvider {
  override implicit val version: ScalaVersion = Scala_2_10
}

--- 
+++ 
@@ -3,7 +3,7 @@
 import com.intellij.openapi.module.Module
 import org.jetbrains.plugins.scala.TestFixtureProvider
 import org.jetbrains.plugins.scala.base.libraryLoaders.LibraryLoader
-import org.jetbrains.plugins.scala.debugger.{ScalaVersion, Scala_2_10}
+import org.jetbrains.plugins.scala.debugger.{ScalaVersion, Scala_2_13}
 
 import scala.collection.mutable
 import scala.collection.mutable.ListBuffer
@@ -33,5 +33,5 @@
 
 // Java compatibility
 trait DefaultScalaSdkOwner extends ScalaSdkOwner with TestFixtureProvider {
-  override implicit val version: ScalaVersion = Scala_2_10
+  override implicit val version: ScalaVersion = Scala_2_13
 }
Use scala varsion 2.13 as default in tests

 #SCL-15634 fixed
