diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/powerAssertSimple/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/powerAssertSimple/build.gradle.kts
index 89f525b1fb9..13b1ab62735 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/powerAssertSimple/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/powerAssertSimple/build.gradle.kts
@@ -34,15 +34,14 @@ kotlin {
 }
 
 powerAssert {
-    functions = listOf(
-        "kotlin.assert",
+    functions.addAll(
         "kotlin.test.assertTrue",
         "kotlin.require",
         "sample.AssertScope.assert",
         "sample.assert",
         "sample.dbg"
     )
-    excludedSourceSets = listOf(
+    excludedSourceSets.addAll(
         "commonMain",
         "jvmMain",
         "jsMain",
diff --git a/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradleExtension.kt b/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradleExtension.kt
index 93c291b5f81..4c22611962b 100644
--- a/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradleExtension.kt
+++ b/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradleExtension.kt
@@ -19,7 +19,16 @@
 
 package org.jetbrains.kotlin.powerassert.gradle
 
-open class PowerAssertGradleExtension {
-    var functions: List<String> = listOf("kotlin.assert")
-    var excludedSourceSets: List<String> = listOf()
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.provider.ListProperty
+import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
+import javax.inject.Inject
+
+@ExperimentalKotlinGradlePluginApi
+abstract class PowerAssertGradleExtension @Inject constructor(
+    objectFactory: ObjectFactory,
+) {
+    val functions: ListProperty<String> = objectFactory.listProperty(String::class.java).convention(listOf("kotlin.assert"))
+
+    val excludedSourceSets: ListProperty<String> = objectFactory.listProperty(String::class.java).convention(emptyList())
 }
diff --git a/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradlePlugin.kt b/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradlePlugin.kt
index 5a310311b41..7088bb1a9b3 100644
--- a/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradlePlugin.kt
+++ b/libraries/tools/kotlin-power-assert/src/common/kotlin/org/jetbrains/kotlin/powerassert/gradle/PowerAssertGradlePlugin.kt
@@ -21,8 +21,10 @@ package org.jetbrains.kotlin.powerassert.gradle
 
 import org.gradle.api.Project
 import org.gradle.api.provider.Provider
+import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.plugin.*
 
+@OptIn(ExperimentalKotlinGradlePluginApi::class)
 class PowerAssertGradlePlugin : KotlinCompilerPluginSupportPlugin {
     companion object {
         private const val POWER_ASSERT_ARTIFACT_NAME = "kotlin-power-assert-compiler-plugin-embeddable"
@@ -37,7 +39,7 @@ class PowerAssertGradlePlugin : KotlinCompilerPluginSupportPlugin {
     override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean {
         val project = kotlinCompilation.target.project
         val extension = project.extensions.getByType(PowerAssertGradleExtension::class.java)
-        return extension.excludedSourceSets.none { it == kotlinCompilation.defaultSourceSet.name }
+        return extension.excludedSourceSets.get().none { it == kotlinCompilation.defaultSourceSet.name }
     }
 
     override fun applyToCompilation(
@@ -45,8 +47,8 @@ class PowerAssertGradlePlugin : KotlinCompilerPluginSupportPlugin {
     ): Provider<List<SubpluginOption>> {
         val project = kotlinCompilation.target.project
         val extension = project.extensions.getByType(PowerAssertGradleExtension::class.java)
-        return project.provider {
-            extension.functions.map {
+        return extension.functions.map { functions ->
+            functions.map {
                 SubpluginOption(key = FUNCTION_ARG_NAME, value = it)
             }
         }