Use @ExtendWith(SpringExtension::class)

config/src/test/kotlin/org/springframework/security/config/annotation/method/configuration/KotlinEnableReactiveMethodSecurityTests.kt

@@ -27,16 +27,16 @@ import org.assertj.core.api.Assertions.assertThat
 import org.assertj.core.api.Assertions.assertThatExceptionOfType
 import org.junit.After
 import org.junit.jupiter.api.Test
-import org.junit.runner.RunWith
+import org.junit.jupiter.api.extension.ExtendWith
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.security.access.AccessDeniedException
 import org.springframework.security.test.context.support.WithMockUser
 import org.springframework.test.context.ContextConfiguration
-import org.springframework.test.context.junit4.SpringRunner
+import org.springframework.test.context.junit.jupiter.SpringExtension
 
-@RunWith(SpringRunner::class)
+@ExtendWith(SpringExtension::class)
 @ContextConfiguration
 class KotlinEnableReactiveMethodSecurityTests {