diff --git a/compiler/test/dotty/tools/StdLibSources.scala b/compiler/test/dotty/tools/StdLibSources.scala
index a0e3665954bd..57778dd50738 100644
--- a/compiler/test/dotty/tools/StdLibSources.scala
+++ b/compiler/test/dotty/tools/StdLibSources.scala
@@ -7,26 +7,11 @@ import org.junit.Assert._
 
 object StdLibSources {
 
-  /* For debug only */
-  private val useExplicitWhiteList = false
-
   private final val stdLibPath = "scala2-library/src/library/"
 
   def blacklistFile: String = "compiler/test/dotc/scala-collections.blacklist"
-  private def whitelistFile: String = "compiler/test/dotc/scala-collections.whitelist"
-
-  def whitelisted: List[String] = {
-    lazy val whitelistBasedOnBlacklist = all.diff(blacklisted)
-    if (!useExplicitWhiteList) {
-      whitelistBasedOnBlacklist
-    } else if (!new File(whitelistFile).exists()) {
-      genWhitelist(whitelistBasedOnBlacklist.map(_.replace(stdLibPath, "")))
-      whitelistBasedOnBlacklist
-    } else {
-      loadList(whitelistFile)
-    }
-  }
 
+  def whitelisted: List[String] = all.diff(blacklisted)
   def blacklisted: List[String] = loadList(blacklistFile)
 
   def all: List[String] = {
@@ -38,17 +23,6 @@ object StdLibSources {
     collectAllFilesInDir(new File(stdLibPath), Nil)
   }
 
-  private def genWhitelist(list: List[String]): Unit = {
-    println(s"Generating $whitelistFile based on $blacklistFile")
-    val whitelist = new File(whitelistFile)
-    val p = new java.io.PrintWriter(whitelist)
-    try {
-      list.foreach(p.println)
-    } finally {
-      p.close()
-    }
-  }
-
   private def loadList(path: String): List[String] = Source.fromFile(path, "UTF8").getLines()
     .map(_.trim) // allow identation
     .filter(!_.startsWith("#")) // allow comment lines prefixed by #
@@ -58,17 +32,3 @@ object StdLibSources {
     .toList
 
 }
-
-class StdLibSources {
-  @Test def checkWBLists = {
-    val stdlibFilesBlackListed = StdLibSources.blacklisted
-
-    val duplicates = stdlibFilesBlackListed.groupBy(x => x).filter(_._2.size > 1).filter(_._2.size > 1)
-    val msg = duplicates.map(x => s"'${x._1}' appears ${x._2.size} times").mkString(s"Duplicate entries in ${StdLibSources.blacklistFile}:\n", "\n", "\n")
-    assertTrue(msg, duplicates.isEmpty)
-
-    val filesNotInStdLib = stdlibFilesBlackListed.toSet -- StdLibSources.all
-    val msg2 = filesNotInStdLib.map(x => s"'$x'").mkString(s"Entries in ${StdLibSources.blacklistFile} where not found:\n", "\n", "\n")
-    assertTrue(msg2, filesNotInStdLib.isEmpty)
-  }
-}