diff --git a/compiler/test/dotty/tools/dotc/CompilationTests.scala b/compiler/test/dotty/tools/dotc/CompilationTests.scala
index 4cbbc24d7d7c..bc639e3c9578 100644
--- a/compiler/test/dotty/tools/dotc/CompilationTests.scala
+++ b/compiler/test/dotty/tools/dotc/CompilationTests.scala
@@ -220,7 +220,7 @@ class CompilationTests extends ParallelTesting {
       Array("-Ycheck-reentrant", "-Yemit-tasty-in-class")
     )
 
-    val libraryDirs = List(Paths.get("library/src"), Paths.get("library/src-scala3"))
+    val libraryDirs = List(Paths.get("library/src"), Paths.get("library/src-bootstrapped"))
     val librarySources = libraryDirs.flatMap(d => sources(Files.walk(d)))
 
     val lib =
diff --git a/library/src-scala3/scala/StagedTuple.scala b/library/src-bootstrapped/scala/StagedTuple.scala
similarity index 100%
rename from library/src-scala3/scala/StagedTuple.scala
rename to library/src-bootstrapped/scala/StagedTuple.scala
diff --git a/library/src-scala3/scala/Tuple.scala b/library/src-bootstrapped/scala/Tuple.scala
similarity index 100%
rename from library/src-scala3/scala/Tuple.scala
rename to library/src-bootstrapped/scala/Tuple.scala
diff --git a/library/src-scala3/scala/quoted/package.scala b/library/src-bootstrapped/scala/quoted/package.scala
similarity index 100%
rename from library/src-scala3/scala/quoted/package.scala
rename to library/src-bootstrapped/scala/quoted/package.scala
diff --git a/library/src-scala3/scala/typelevel/package.scala b/library/src-bootstrapped/scala/typelevel/package.scala
similarity index 100%
rename from library/src-scala3/scala/typelevel/package.scala
rename to library/src-bootstrapped/scala/typelevel/package.scala
diff --git a/library/src-scala2/scala/Tuple.scala b/library/src-non-bootstrapped/scala/Tuple.scala
similarity index 100%
rename from library/src-scala2/scala/Tuple.scala
rename to library/src-non-bootstrapped/scala/Tuple.scala
diff --git a/project/Build.scala b/project/Build.scala
index d616430f56fc..6980aca320bb 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -775,14 +775,14 @@ object Build {
   lazy val dottyLibrarySettings = Seq(
     libraryDependencies += "org.scala-lang" % "scala-library" % scalacVersion,
     // Add version-specific source directories:
-    // - files in src-scala3 will only be compiled by dotty
-    // - files in src-scala2 will only be compiled by scalac
+    // - files in src-non-bootstrapped will only be compiled by the reference compiler (scalac)
+    // - files in src-bootstrapped will only be compiled by the current dotty compiler (non-bootstrapped and bootstrapped)
     unmanagedSourceDirectories in Compile += {
       val baseDir = baseDirectory.value
       if (isDotty.value)
-        baseDir / "src-scala3"
+        baseDir / "src-bootstrapped"
       else
-        baseDir / "src-scala2"
+        baseDir / "src-non-bootstrapped"
     }
   )