diff --git a/api/src/test/kotlin/se/ansman/kotshi/TestKotshiUtils.kt b/api/src/test/kotlin/se/ansman/kotshi/TestKotshiUtils.kt
index 3b84c94..035f3b6 100644
--- a/api/src/test/kotlin/se/ansman/kotshi/TestKotshiUtils.kt
+++ b/api/src/test/kotlin/se/ansman/kotshi/TestKotshiUtils.kt
@@ -4,7 +4,7 @@ import assertk.assertThat
 import assertk.assertions.isEqualTo
 import assertk.assertions.isNotEqualTo
 import com.squareup.moshi.JsonQualifier
-import org.junit.Test
+import org.junit.jupiter.api.Test
 import se.ansman.kotshi.KotshiUtils.createJsonQualifierImplementation
 import se.ansman.kotshi.KotshiUtils.matches
 import kotlin.reflect.KClass
diff --git a/gradle-plugin/src/main/kotlin/library.gradle.kts b/gradle-plugin/src/main/kotlin/library.gradle.kts
index ad3f7f9..8555769 100644
--- a/gradle-plugin/src/main/kotlin/library.gradle.kts
+++ b/gradle-plugin/src/main/kotlin/library.gradle.kts
@@ -25,10 +25,23 @@ tasks.withType<KotlinCompile>().configureEach {
     }
 }
 
+tasks.withType<Test>().configureEach {
+    useJUnitPlatform()
+    maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
+    systemProperties(
+        "junit.jupiter.execution.parallel.enabled" to "true",
+        "junit.jupiter.execution.parallel.config.strategy" to "dynamic",
+        "junit.jupiter.execution.parallel.config.dynamic.factor" to "1",
+        "junit.jupiter.execution.parallel.mode.default" to "concurrent",
+        "junit.jupiter.execution.parallel.mode.classes.default" to "concurrent",
+    )
+}
+
 tasks.withType<Javadoc> { enabled = false }
 
 dependencies {
     testImplementation(libs.junit)
+    testImplementation(libs.junit.jupiter)
     testImplementation(libs.assertk)
     testImplementation(libs.kotlin.test.junit)
 }
\ No newline at end of file
diff --git a/gradle-plugin/src/main/kotlin/test-library.gradle.kts b/gradle-plugin/src/main/kotlin/test-library.gradle.kts
index 2f222cb..0d7d5ae 100644
--- a/gradle-plugin/src/main/kotlin/test-library.gradle.kts
+++ b/gradle-plugin/src/main/kotlin/test-library.gradle.kts
@@ -16,7 +16,6 @@ sourceSets {
 }
 
 tasks.withType<Test>().configureEach {
-    maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
     jvmArgs(
         "--add-opens=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED",
         "--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED",
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 2602c2b..bbd5e2a 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -28,6 +28,8 @@ kotlinpoet-ksp = { module = "com.squareup:kotlinpoet-ksp", version.ref = "kotlin
 kotlinx-metadata = "org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.6.0"
 
 junit = "junit:junit:4.13.2"
+junit-jupiter = "org.junit.jupiter:junit-jupiter:5.9.1"
+
 assertk = "com.willowtreeapps.assertk:assertk-jvm:0.25"
 
 compileTesting-core = { module = "com.github.tschuchortdev:kotlin-compile-testing", version.ref = "compileTesting" }
diff --git a/settings.gradle.kts b/settings.gradle.kts
index a703d08..810b1a6 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -5,6 +5,10 @@ pluginManagement {
     }
 }
 
+plugins {
+    id("com.gradle.enterprise") version "3.9"
+}
+
 rootProject.name = "kotshi"
 include("compiler")
 include("api")
@@ -20,4 +24,14 @@ dependencyResolutionManagement {
         google()
         mavenCentral()
     }
+}
+
+gradleEnterprise {
+    if (System.getenv("CI") != null) {
+        buildScan {
+            publishAlways()
+            termsOfServiceUrl = "https://gradle.com/terms-of-service"
+            termsOfServiceAgree = "yes"
+        }
+    }
 }
\ No newline at end of file
diff --git a/tests/ksp/src/test/kotlin/se/ansman/kotshi/KspGeneratorTest.kt b/tests/ksp/src/test/kotlin/se/ansman/kotshi/KspGeneratorTest.kt
index 496ff40..ed18484 100644
--- a/tests/ksp/src/test/kotlin/se/ansman/kotshi/KspGeneratorTest.kt
+++ b/tests/ksp/src/test/kotlin/se/ansman/kotshi/KspGeneratorTest.kt
@@ -7,17 +7,20 @@ import com.tschuchort.compiletesting.SourceFile
 import com.tschuchort.compiletesting.kspArgs
 import com.tschuchort.compiletesting.kspIncremental
 import com.tschuchort.compiletesting.symbolProcessorProviders
-import org.junit.Test
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.parallel.Execution
+import org.junit.jupiter.api.parallel.ExecutionMode
 import se.ansman.kotshi.ksp.KotshiSymbolProcessor
 import se.ansman.kotshi.ksp.KotshiSymbolProcessorProvider
 import java.io.File
 import kotlin.test.assertEquals
 
+@Execution(ExecutionMode.SAME_THREAD)
 class KspGeneratorTest : BaseGeneratorTest() {
     override val processorClassName: String get() = KotshiSymbolProcessor::class.java.canonicalName
 
     override val extraGeneratedFiles: List<File>
-        get() = temporaryFolder.root.resolve("ksp/sources/kotlin/").listFiles()?.asList() ?: emptyList()
+        get() = temporaryFolder.resolve("ksp/sources/kotlin/").listFiles()?.asList() ?: emptyList()
 
     override fun KotlinCompilation.setUp(options: Map<String, String>) {
         kspIncremental = true
diff --git a/tests/src/test/kotlin/se/ansman/kotshi/BaseGeneratorTest.kt b/tests/src/test/kotlin/se/ansman/kotshi/BaseGeneratorTest.kt
index 6229a55..4e48cec 100644
--- a/tests/src/test/kotlin/se/ansman/kotshi/BaseGeneratorTest.kt
+++ b/tests/src/test/kotlin/se/ansman/kotshi/BaseGeneratorTest.kt
@@ -9,9 +9,8 @@ import com.tschuchort.compiletesting.KotlinCompilation
 import com.tschuchort.compiletesting.SourceFile
 import com.tschuchort.compiletesting.SourceFile.Companion.java
 import com.tschuchort.compiletesting.SourceFile.Companion.kotlin
-import org.junit.Rule
-import org.junit.Test
-import org.junit.rules.TemporaryFolder
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
 import se.ansman.kotshi.Errors.ignoredDataClassPropertyWithoutDefaultValue
 import se.ansman.kotshi.Errors.javaClassNotSupported
 import se.ansman.kotshi.Errors.jsonDefaultValueAppliedToInvalidType
@@ -29,9 +28,8 @@ import se.ansman.kotshi.assertions.isAssignableTo
 import java.io.File
 
 abstract class BaseGeneratorTest {
-    @Rule
-    @JvmField
-    val temporaryFolder: TemporaryFolder = TemporaryFolder()
+    @TempDir
+    lateinit var temporaryFolder: File
 
     protected abstract val processorClassName: String
     protected open val extraGeneratedFiles: List<File> get() = emptyList()
@@ -572,7 +570,7 @@ abstract class BaseGeneratorTest {
     protected fun compile(vararg sources: SourceFile, options: Map<String, String> = emptyMap()) =
         KotlinCompilation()
             .apply {
-                workingDir = temporaryFolder.root
+                workingDir = temporaryFolder
                 this.sources = sources.asList()
                 inheritClassPath = true
                 messageOutputStream = System.out // see diagnostics in real time