diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index a18f50a7..4948b820 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-junit = "5.14.0"
+junit = "6.0.0"
 komapper = "5.6.0"
 kotlin = "2.2.20"
 ksp = "2.2.20-2.0.4"
diff --git a/repository-pattern-jdbc/src/test/kotlin/org/komapper/example/ExampleRepositoryTest.kt b/repository-pattern-jdbc/src/test/kotlin/org/komapper/example/ExampleRepositoryTest.kt
index f0ab36a2..3edba273 100644
--- a/repository-pattern-jdbc/src/test/kotlin/org/komapper/example/ExampleRepositoryTest.kt
+++ b/repository-pattern-jdbc/src/test/kotlin/org/komapper/example/ExampleRepositoryTest.kt
@@ -156,9 +156,9 @@ class ExampleRepositoryTest : InvocationInterceptor {
     }
 
     override fun interceptTestMethod(
-        invocation: InvocationInterceptor.Invocation<Void>?,
-        invocationContext: ReflectiveInvocationContext<Method>?,
-        extensionContext: ExtensionContext?,
+        invocation: InvocationInterceptor.Invocation<Void?>,
+        invocationContext: ReflectiveInvocationContext<Method>,
+        extensionContext: ExtensionContext,
     ) {
         db.config.session.transactionOperator.required {
             it.isRollbackOnly()