diff --git a/compiler/src/dotty/tools/dotc/Compiler.scala b/compiler/src/dotty/tools/dotc/Compiler.scala
index 48290ac3fb2f..0d87e146fc75 100644
--- a/compiler/src/dotty/tools/dotc/Compiler.scala
+++ b/compiler/src/dotty/tools/dotc/Compiler.scala
@@ -7,7 +7,7 @@ import typer.{FrontEnd, RefChecks}
 import Phases.Phase
 import transform._
 import dotty.tools.backend.jvm.{CollectSuperCalls, GenBCode}
-import dotty.tools.backend.sjs
+import dotty.tools.backend
 import dotty.tools.dotc.transform.localopt.StringInterpolatorOpt
 
 /** The central class of the dotc compiler. The job of a compiler is to create
@@ -72,7 +72,7 @@ class Compiler {
     List(new ElimOpaque,             // Turn opaque into normal aliases
          new TryCatchPatterns,       // Compile cases in try/catch
          new PatternMatcher,         // Compile pattern matches
-         new ExplicitJSClasses,      // Make all JS classes explicit (Scala.js only)
+         new sjs.ExplicitJSClasses,  // Make all JS classes explicit (Scala.js only)
          new ExplicitOuter,          // Add accessors to outer classes from nested ones.
          new ExplicitSelf,           // Make references to non-trivial self types explicit as casts
          new StringInterpolatorOpt,  // Optimizes raw and s string interpolators by rewriting them to string concatentations
@@ -128,8 +128,8 @@ class Compiler {
 
   /** Generate the output of the compilation */
   protected def backendPhases: List[List[Phase]] =
-    List(new sjs.GenSJSIR) ::        // Generate .sjsir files for Scala.js (not enabled by default)
-    List(new GenBCode) ::            // Generate JVM bytecode
+    List(new backend.sjs.GenSJSIR) :: // Generate .sjsir files for Scala.js (not enabled by default)
+    List(new GenBCode) ::             // Generate JVM bytecode
     Nil
 
   var runId: Int = 1
diff --git a/compiler/src/dotty/tools/dotc/transform/ExplicitJSClasses.scala b/compiler/src/dotty/tools/dotc/transform/sjs/ExplicitJSClasses.scala
similarity index 99%
rename from compiler/src/dotty/tools/dotc/transform/ExplicitJSClasses.scala
rename to compiler/src/dotty/tools/dotc/transform/sjs/ExplicitJSClasses.scala
index 8458edc9fa2c..a77916bd8aa1 100644
--- a/compiler/src/dotty/tools/dotc/transform/ExplicitJSClasses.scala
+++ b/compiler/src/dotty/tools/dotc/transform/sjs/ExplicitJSClasses.scala
@@ -1,6 +1,7 @@
 package dotty.tools
 package dotc
 package transform
+package sjs
 
 import MegaPhase._
 import core.DenotTransformers._
diff --git a/compiler/src/dotty/tools/backend/sjs/JUnitBootstrappers.scala b/compiler/src/dotty/tools/dotc/transform/sjs/JUnitBootstrappers.scala
similarity index 99%
rename from compiler/src/dotty/tools/backend/sjs/JUnitBootstrappers.scala
rename to compiler/src/dotty/tools/dotc/transform/sjs/JUnitBootstrappers.scala
index 1c14780277d7..b1caa01ca5c7 100644
--- a/compiler/src/dotty/tools/backend/sjs/JUnitBootstrappers.scala
+++ b/compiler/src/dotty/tools/dotc/transform/sjs/JUnitBootstrappers.scala
@@ -1,9 +1,9 @@
-package dotty.tools.backend.sjs
+package dotty.tools.dotc
+package transform
+package sjs
 
 import scala.annotation.tailrec
 
-import dotty.tools.dotc._
-
 import dotty.tools.dotc.core._
 import Constants._
 import Contexts._
@@ -19,6 +19,8 @@ import Types._
 
 import dotty.tools.dotc.transform.MegaPhase._
 
+import dotty.tools.backend.sjs.JSDefinitions.jsdefn
+
 /** Generates JUnit bootstrapper objects for Scala.js.
  *
  *  On the JVM, JUnit uses run-time reflection to list and invoke JUnit-related
@@ -108,7 +110,6 @@ import dotty.tools.dotc.transform.MegaPhase._
 class JUnitBootstrappers extends MiniPhase {
   import JUnitBootstrappers._
   import ast.tpd._
-  import JSDefinitions.jsdefn
 
   def phaseName: String = "junitBootstrappers"