diff --git a/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateExtNativeBlackboxTests.kt b/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateExtNativeBlackboxTests.kt
index 6b0db2c128e..588c8f646a5 100644
--- a/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateExtNativeBlackboxTests.kt
+++ b/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateExtNativeBlackboxTests.kt
@@ -13,19 +13,16 @@ import org.jetbrains.kotlin.konan.blackboxtest.group.ExtTestCaseGroupProvider
 fun main() {
     System.setProperty("java.awt.headless", "true")
 
-    runAndLogDuration("Generating external Kotlin/Native blackbox tests") {
-        generateTestGroupSuiteWithJUnit5 {
-            cleanTestGroup(
-                testsRoot = "native/tests-blackbox/ext-tests-gen",
-                testDataRoot = "compiler/testData"
+    generateTestGroupSuiteWithJUnit5 {
+        testGroup("native/tests-blackbox/ext-tests-gen", "compiler/testData") {
+            testClass<AbstractNativeBlackBoxTest>(
+                suiteTestClassName = "NativeExtBlackBoxTestGenerated",
+                annotations = listOf(
+                    annotation(CustomNativeBlackBoxTestCaseGroupProvider::class.java, ExtTestCaseGroupProvider::class.java)
+                )
             ) {
-                testClass<AbstractNativeBlackBoxTest>(
-                    suiteTestClassName = "NativeExtBlackBoxTestGenerated",
-                    annotations = listOf(annotation(CustomNativeBlackBoxTestCaseGroupProvider::class.java, ExtTestCaseGroupProvider::class.java))
-                ) {
-                    model("codegen/box")
-                    model("codegen/boxInline")
-                }
+                model("codegen/box")
+                model("codegen/boxInline")
             }
         }
     }
diff --git a/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateNativeBlackboxTests.kt b/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateNativeBlackboxTests.kt
index 8705e8428f6..32a563ee6c3 100644
--- a/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateNativeBlackboxTests.kt
+++ b/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GenerateNativeBlackboxTests.kt
@@ -11,13 +11,11 @@ import org.jetbrains.kotlin.konan.blackboxtest.AbstractNativeBlackBoxTest
 fun main() {
     System.setProperty("java.awt.headless", "true")
 
-    runAndLogDuration("Generating Kotlin/Native blackbox tests") {
-        generateTestGroupSuiteWithJUnit5 {
-            cleanTestGroup("native/tests-blackbox/tests-gen", "native/tests-blackbox/testData") {
-                testClass<AbstractNativeBlackBoxTest> {
-                    model("samples")
-                    model("samples2")
-                }
+    generateTestGroupSuiteWithJUnit5 {
+        testGroup("native/tests-blackbox/tests-gen", "native/tests-blackbox/testData") {
+            testClass<AbstractNativeBlackBoxTest> {
+                model("samples")
+                model("samples2")
             }
         }
     }
diff --git a/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GeneratorUtil.kt b/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GeneratorUtil.kt
deleted file mode 100644
index f070a316b54..00000000000
--- a/native/tests-blackbox/tests/org/jetbrains/kotlin/generators/tests/GeneratorUtil.kt
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright 2010-2021 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.
- */
-
-@file:Suppress("unused")
-
-package org.jetbrains.kotlin.generators.tests
-
-import org.jetbrains.kotlin.generators.TestGroup
-import org.jetbrains.kotlin.generators.TestGroupSuite
-import org.jetbrains.kotlin.konan.blackboxtest.util.getAbsoluteFile
-import java.io.File
-import kotlin.system.measureTimeMillis
-
-/** Fully clean-up the tests root directory before generating new test classes. */
-internal fun TestGroupSuite.cleanTestGroup(testsRoot: String, testDataRoot: String, init: TestGroup.() -> Unit) {
-    getAbsoluteFile(localPath = testsRoot).deleteRecursivelyWithLogging()
-    testGroup(testsRoot, testDataRoot, init = init)
-}
-
-internal fun runAndLogDuration(actionDescription: String, action: () -> Unit) {
-    println("$actionDescription...")
-
-    val duration = measureTimeMillis(action)
-    val seconds = duration / 1000
-    val millis = duration % 100
-
-    println(
-        buildString {
-            append(actionDescription)
-            append(" took ")
-            if (seconds > 0) append(seconds).append("s ")
-            append(millis).append("ms")
-        }
-    )
-}
-
-internal fun File.deleteRecursivelyWithLogging() {
-    if (exists()) {
-        walkBottomUp().forEach { entry ->
-            val message = when {
-                entry.isFile -> "File removed: $entry"
-                entry.isDirectory && entry == this -> {
-                    // Don't report directories except for the root directory.
-                    "Directory removed (recursively): $entry"
-                }
-                else -> null
-            }
-
-            entry.delete()
-            message?.let(::println)
-        }
-    }
-}