diff --git a/build.gradle.kts b/build.gradle.kts
index 9206e85..29040ac 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,7 @@
 plugins {
     alias(libs.plugins.kotlin.jvm) apply false
     alias(libs.plugins.kotlin.multiplatform) apply false
+    alias(libs.plugins.node.gradle) apply false
     alias(libs.plugins.kotlin.binary.compatibility.validator) apply false
     alias(libs.plugins.buildconfig) apply false
 }
diff --git a/compiler-plugin/build.gradle.kts b/compiler-plugin/build.gradle.kts
index 14c3d17..2913e26 100644
--- a/compiler-plugin/build.gradle.kts
+++ b/compiler-plugin/build.gradle.kts
@@ -1,10 +1,19 @@
+@file:OptIn(ExperimentalWasmDsl::class)
+
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+import org.jetbrains.kotlin.gradle.targets.wasm.d8.D8EnvSpec
+import org.jetbrains.kotlin.gradle.targets.wasm.d8.D8Plugin
+
 plugins {
     alias(libs.plugins.kotlin.jvm)
     alias(libs.plugins.buildconfig)
     alias(libs.plugins.gradle.java.test.fixtures)
+    alias(libs.plugins.node.gradle)
     alias(libs.plugins.gradle.idea)
 }
 
+project.plugins.apply(D8Plugin::class.java)
+
 sourceSets {
     main {
         java.setSrcDirs(listOf("src"))
@@ -32,6 +41,7 @@ dependencies {
     testFixturesApi(libs.kotlin.test.junit5)
     testFixturesApi(libs.kotlin.test.framework)
     testFixturesApi(libs.kotlin.compiler)
+    testFixturesRuntimeOnly(libs.junit)
 
     annotationsRuntimeClasspath(project(":plugin-annotations"))
 
@@ -42,6 +52,9 @@ dependencies {
     testArtifacts(libs.kotlin.test)
     testArtifacts(libs.kotlin.script.runtime)
     testArtifacts(libs.kotlin.annotations.jvm)
+
+    testArtifacts(libs.kotlin.stdlib.js)
+    testArtifacts(libs.kotlin.test.js)
 }
 
 buildConfig {
@@ -71,6 +84,17 @@ tasks.test {
 
     systemProperty("idea.ignore.disabled.plugins", "true")
     systemProperty("idea.home.path", rootDir)
+
+    // Properties required to run JS tests from the internal test framework.
+    val d8EnvSpec = project.the<D8EnvSpec>()
+    with(d8EnvSpec) { dependsOn(project.d8SetupTaskProvider) }
+
+    setLibraryProperty("org.jetbrains.kotlin.test.kotlin-stdlib-js", "kotlin-stdlib-js")
+    setLibraryProperty("org.jetbrains.kotlin.test.kotlin-test-js", "kotlin-test-js")
+
+    systemProperty("javascript.engine.path.V8", d8EnvSpec.executable.get())
+    systemProperty("javascript.engine.path.repl", "${layout.projectDirectory.file("repl.js").asFile}")
+    systemProperty("kotlin.js.test.root.out.dir", "${layout.buildDirectory.get().asFile}/js-test-output")
 }
 
 kotlin {
diff --git a/compiler-plugin/repl.js b/compiler-plugin/repl.js
new file mode 100644
index 0000000..0990e71
--- /dev/null
+++ b/compiler-plugin/repl.js
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// <path-to-v8> js/js.tests/test/org/jetbrains/kotlin/js/engine/repl.js
+
+/*
+Some of non-standard APIs available in standalone JS engines:
+
+            v8   sm  jsc
+load         +    +    +    load and evaluate a file
+print        +    +    +    print to stdout
+printErr     +    +    +    print to stderr
+read         +    +    +    read a file as a text (v8, sm, jsc) or binary (sm, jsc)
+readline     +    +    +    read line from stdin
+readbuffer   +    -    -    read a binary file in v8
+quit         +    +    +    stop the process
+
+V8:
+https://v8.dev/docs/d8
+https://github.com/v8/v8/blob/4b9b23521e6fd42373ebbcb20ebe03bf445494f9/src/d8.cc
+https://riptutorial.com/v8/example/25393/useful-built-in-functions-and-objects-in-d8
+
+SpiderMonkey:
+https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Introduction_to_the_JavaScript_shell
+
+JavaScriptCore:
+https://trac.webkit.org/wiki/JSC
+https://github.com/WebKit/webkit/blob/master/Source/JavaScriptCore/jsc.cpp
+*/
+
+/**
+ * @type {number}
+ */
+let currentRealmIndex = Realm.current();
+
+function resetRealm() {
+    if (currentRealmIndex !== 0) Realm.dispose(currentRealmIndex);
+    currentRealmIndex = Realm.createAllowCrossRealmAccess()
+}
+
+/**
+ * @type {?Map<string, ?any>}
+ */
+let globalState = null;
+
+function saveGlobalState() {
+    globalState = new Map();
+    const currentGlobal = Realm.global(currentRealmIndex)
+    for (const k in currentGlobal) {
+        globalState.set(k, currentGlobal[k]);
+    }
+
+    console.log(Array.from(globalState.entries()))
+}
+
+function restoreGlobalState() {
+    if (globalState === null) throw Error("There is no saved state!")
+
+    const currentGlobal = Realm.global(currentRealmIndex)
+
+    console.log(Array.from(globalState.entries()))
+
+    for (const k in currentGlobal) {
+        let prev = globalState.get(k);
+        if (prev !== currentGlobal[k]) {
+            currentGlobal[k] = prev;
+        }
+    }
+    globalState = null;
+}
+
+// To prevent accessing to current global state
+resetRealm();
+
+// noinspection InfiniteLoopJS
+async function loop() {
+    while (true) {
+        let code = readline().replace(/\\n/g, '\n');
+
+        try {
+            switch (code) {
+                case "!reset":
+                    resetRealm()
+                    break;
+                case "!saveGlobalState":
+                    saveGlobalState();
+                    break;
+                case "!restoreGlobalState":
+                    restoreGlobalState();
+                    break;
+                default:
+                    print(await Realm.eval(currentRealmIndex, code));
+            }
+        } catch(e) {
+            printErr(e.stack != null ? e.stack : e.toString());
+            printErr('\nCODE:\n' + code);
+        }
+
+        print('<END>');
+    }
+}
+
+loop()
\ No newline at end of file
diff --git a/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/GenerateTests.kt b/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/GenerateTests.kt
index 751c9e3..b0efa32 100644
--- a/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/GenerateTests.kt
+++ b/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/GenerateTests.kt
@@ -1,5 +1,6 @@
 package org.jetbrains.kotlin.compiler.plugin.template
 
+import org.jetbrains.kotlin.compiler.plugin.template.runners.AbstractJsBoxTest
 import org.jetbrains.kotlin.compiler.plugin.template.runners.AbstractJvmBoxTest
 import org.jetbrains.kotlin.compiler.plugin.template.runners.AbstractJvmDiagnosticTest
 import org.jetbrains.kotlin.generators.dsl.junit5.generateTestGroupSuiteWithJUnit5
@@ -14,6 +15,10 @@ fun main() {
             testClass<AbstractJvmBoxTest> {
                 model("box")
             }
+
+            testClass<AbstractJsBoxTest> {
+                model("box")
+            }
         }
     }
 }
diff --git a/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/runners/AbstractJsBoxTest.kt b/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/runners/AbstractJsBoxTest.kt
new file mode 100644
index 0000000..0a4bc66
--- /dev/null
+++ b/compiler-plugin/test-fixtures/org/jetbrains/kotlin/compiler/plugin/template/runners/AbstractJsBoxTest.kt
@@ -0,0 +1,44 @@
+package org.jetbrains.kotlin.compiler.plugin.template.runners
+
+import org.jetbrains.kotlin.compiler.plugin.template.services.configurePlugin
+import org.jetbrains.kotlin.js.test.runners.AbstractJsTest
+import org.jetbrains.kotlin.test.FirParser
+import org.jetbrains.kotlin.test.builders.TestConfigurationBuilder
+import org.jetbrains.kotlin.test.directives.CodegenTestDirectives
+import org.jetbrains.kotlin.test.directives.FirDiagnosticsDirectives
+import org.jetbrains.kotlin.test.services.EnvironmentBasedStandardLibrariesPathProvider
+import org.jetbrains.kotlin.test.services.KotlinStandardLibrariesPathProvider
+
+open class AbstractJsBoxTest : AbstractJsTest(
+    pathToTestDir = "compiler-plugin/testData/box",
+    testGroupOutputDirPrefix = "box/",
+    parser = FirParser.LightTree,
+) {
+    override fun createKotlinStandardLibrariesPathProvider(): KotlinStandardLibrariesPathProvider {
+        return EnvironmentBasedStandardLibrariesPathProvider
+    }
+
+    override fun configure(builder: TestConfigurationBuilder) {
+        super.configure(builder)
+
+        with(builder) {
+            /*
+             * Containers of different directives, which can be used in tests:
+             * - ModuleStructureDirectives
+             * - LanguageSettingsDirectives
+             * - DiagnosticsDirectives
+             * - FirDiagnosticsDirectives
+             * - CodegenTestDirectives
+             * - JvmEnvironmentConfigurationDirectives
+             *
+             * All of them are located in `org.jetbrains.kotlin.test.directives` package
+             */
+            defaultDirectives {
+                +CodegenTestDirectives.DUMP_IR
+                +FirDiagnosticsDirectives.FIR_DUMP
+            }
+
+            configurePlugin()
+        }
+    }
+}
diff --git a/compiler-plugin/test-gen/org/jetbrains/kotlin/compiler/plugin/template/runners/JsBoxTestGenerated.java b/compiler-plugin/test-gen/org/jetbrains/kotlin/compiler/plugin/template/runners/JsBoxTestGenerated.java
new file mode 100644
index 0000000..b9b034f
--- /dev/null
+++ b/compiler-plugin/test-gen/org/jetbrains/kotlin/compiler/plugin/template/runners/JsBoxTestGenerated.java
@@ -0,0 +1,34 @@
+
+
+package org.jetbrains.kotlin.compiler.plugin.template.runners;
+
+import com.intellij.testFramework.TestDataPath;
+import org.jetbrains.kotlin.test.util.KtTestUtil;
+import org.jetbrains.kotlin.test.TestMetadata;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.util.regex.Pattern;
+
+/** This class is generated by {@link org.jetbrains.kotlin.compiler.plugin.template.GenerateTestsKt}. DO NOT MODIFY MANUALLY */
+@SuppressWarnings("all")
+@TestMetadata("compiler-plugin/testData/box")
+@TestDataPath("$PROJECT_ROOT")
+public class JsBoxTestGenerated extends AbstractJsBoxTest {
+  @Test
+  public void testAllFilesPresentInBox() {
+    KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler-plugin/testData/box"), Pattern.compile("^(.+)\\.kt$"), null, true);
+  }
+
+  @Test
+  @TestMetadata("anotherBoxTest.kt")
+  public void testAnotherBoxTest() {
+    runTest("compiler-plugin/testData/box/anotherBoxTest.kt");
+  }
+
+  @Test
+  @TestMetadata("simple.kt")
+  public void testSimple() {
+    runTest("compiler-plugin/testData/box/simple.kt");
+  }
+}
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 5e3613e..dcf10c1 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,18 +1,24 @@
 [versions]
 # https://github.com/JetBrains/kotlin
-kotlin = "2.3.0"
+kotlin = "2.3.20-RC"
 
 # https://github.com/Kotlin/binary-compatibility-validator
 kotlin-binaryCompatibilityValidator = "0.16.3"
 
+# https://github.com/junit-team/junit4
+junit = "4.13.2"
+
 # https://github.com/gmazzo/gradle-buildconfig-plugin
 buildconfig = "5.6.5"
 
+node-gradle = "7.0.2"
 
 [libraries]
 kotlin-stdlib = { group = "org.jetbrains.kotlin", name = "kotlin-stdlib", version.ref = "kotlin" }
 kotlin-stdlib-jdk8 = { group = "org.jetbrains.kotlin", name = "kotlin-stdlib-jdk8", version.ref = "kotlin" }
+kotlin-stdlib-js = { group = "org.jetbrains.kotlin", name = "kotlin-stdlib-js", version.ref = "kotlin" }
 kotlin-test = { group = "org.jetbrains.kotlin", name = "kotlin-test", version.ref = "kotlin" }
+kotlin-test-js = { group = "org.jetbrains.kotlin", name = "kotlin-test-js", version.ref = "kotlin" }
 kotlin-script-runtime = { group = "org.jetbrains.kotlin", name = "kotlin-script-runtime", version.ref = "kotlin" }
 kotlin-test-junit5 = { group = "org.jetbrains.kotlin", name = "kotlin-test-junit5", version.ref = "kotlin" }
 kotlin-test-framework = { group = "org.jetbrains.kotlin", name = "kotlin-compiler-internal-test-framework", version.ref = "kotlin" }
@@ -21,11 +27,14 @@ kotlin-compiler = { group = "org.jetbrains.kotlin", name = "kotlin-compiler", ve
 kotlin-reflect = { group = "org.jetbrains.kotlin", name = "kotlin-reflect", version.ref = "kotlin" }
 kotlin-gradle-plugin-api  = { group = "org.jetbrains.kotlin", name = "kotlin-gradle-plugin-api", version.ref = "kotlin" }
 
+junit = { module = "junit:junit", version.ref = "junit" }
+
 [plugins]
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlin-multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
 kotlin-binary-compatibility-validator = { id = "org.jetbrains.kotlinx.binary-compatibility-validator", version.ref = "kotlin-binaryCompatibilityValidator"}
 buildconfig = { id = "com.github.gmazzo.buildconfig", version.ref = "buildconfig"}
+node-gradle = { id = "com.github.node-gradle.node", version.ref = "node-gradle" }
 
 gradle-java-test-fixtures = { id = "java-test-fixtures" }
 gradle-idea = { id = "idea" }
diff --git a/kotlin-js-store/yarn.lock b/kotlin-js-store/yarn.lock
index e35fa39..40a971f 100644
--- a/kotlin-js-store/yarn.lock
+++ b/kotlin-js-store/yarn.lock
@@ -218,6 +218,11 @@ is-fullwidth-code-point@^3.0.0:
   resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz#f116f8064fe90b3f7844a38997c0b75051269f1d"
   integrity sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==
 
+is-path-inside@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/is-path-inside/-/is-path-inside-3.0.3.tgz#d231362e53a07ff2b0e0ea7fed049161ffd16283"
+  integrity sha512-Fd4gABb+ycGAmKou8eMftCupSir5lRxqf4aD/vd0cD2qc4HL07OjCeuHMr8Ro4CoMaeCKDB0/ECBOVWjTwUvPQ==
+
 is-plain-obj@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-2.1.0.tgz#45e42e37fccf1f40da8e5f76ee21515840c09287"
@@ -288,10 +293,10 @@ minimatch@^9.0.4, minimatch@^9.0.5:
   resolved "https://registry.yarnpkg.com/minipass/-/minipass-7.1.2.tgz#93a9626ce5e5e66bd4db86849e7515e92340a707"
   integrity sha512-qOOzS1cBTWYF4BH8fVePDBOO9iptMnGUEZwNc/cMWnTV2nVLZ7VoNWEPHkYczZA0pdoA7dl6e7FL659nX9S2aw==
 
-mocha@11.7.2:
-  version "11.7.2"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-11.7.2.tgz#3c0079fe5cc2f8ea86d99124debcc42bb1ab22b5"
-  integrity sha512-lkqVJPmqqG/w5jmmFtiRvtA2jkDyNVUcefFJKb2uyX4dekk8Okgqop3cgbFiaIvj8uCRJVTP5x9dfxGyXm2jvQ==
+mocha@11.7.5:
+  version "11.7.5"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-11.7.5.tgz#58f5bbfa5e0211ce7e5ee6128107cefc2515a627"
+  integrity sha512-mTT6RgopEYABzXWFx+GcJ+ZQ32kp4fMf0xvpZIIfSq9Z8lC/++MtcCnQ9t5FP2veYEP95FIYSvW+U9fV4xrlig==
   dependencies:
     browser-stdout "^1.3.1"
     chokidar "^4.0.1"
@@ -301,6 +306,7 @@ mocha@11.7.2:
     find-up "^5.0.0"
     glob "^10.4.5"
     he "^1.2.0"
+    is-path-inside "^3.0.3"
     js-yaml "^4.1.0"
     log-symbols "^4.1.0"
     minimatch "^9.0.5"