diff --git a/config/src/test/kotlin/org/springframework/security/config/web/server/ServerHttpBasicDslTests.kt b/config/src/test/kotlin/org/springframework/security/config/web/server/ServerHttpBasicDslTests.kt
index 8094fd884c..c978ccb1b1 100644
--- a/config/src/test/kotlin/org/springframework/security/config/web/server/ServerHttpBasicDslTests.kt
+++ b/config/src/test/kotlin/org/springframework/security/config/web/server/ServerHttpBasicDslTests.kt
@@ -32,10 +32,12 @@ import org.springframework.security.config.annotation.web.reactive.EnableWebFlux
 import org.springframework.security.config.test.SpringTestContext
 import org.springframework.security.config.test.SpringTestContextExtension
 import org.springframework.security.core.Authentication
+import org.springframework.security.core.AuthenticationException
 import org.springframework.security.core.userdetails.MapReactiveUserDetailsService
 import org.springframework.security.core.userdetails.User
 import org.springframework.security.web.server.SecurityWebFilterChain
 import org.springframework.security.web.server.ServerAuthenticationEntryPoint
+import org.springframework.security.web.server.WebFilterExchange
 import org.springframework.security.web.server.authentication.HttpStatusServerEntryPoint
 import org.springframework.security.web.server.authentication.ServerAuthenticationFailureHandler
 import org.springframework.security.web.server.context.ServerSecurityContextRepository
@@ -250,7 +252,7 @@ class ServerHttpBasicDslTests {
     open class CustomAuthenticationFailureHandlerConfig {
 
         companion object {
-            val FAILURE_HANDLER: ServerAuthenticationFailureHandler = ServerAuthenticationFailureHandler { _, _ -> Mono.empty() }
+            val FAILURE_HANDLER: ServerAuthenticationFailureHandler = MockServerAuthenticationFailureHandler()
         }
 
         @Bean
@@ -266,6 +268,16 @@ class ServerHttpBasicDslTests {
         }
     }
 
+    open class MockServerAuthenticationFailureHandler: ServerAuthenticationFailureHandler {
+        override fun onAuthenticationFailure(
+            webFilterExchange: WebFilterExchange?,
+            exception: AuthenticationException?
+        ): Mono<Void> {
+            return Mono.empty()
+        }
+
+    }
+
     @Configuration
     open class UserDetailsConfig {
         @Bean
diff --git a/config/src/test/kotlin/org/springframework/security/config/web/server/ServerOAuth2ResourceServerDslTests.kt b/config/src/test/kotlin/org/springframework/security/config/web/server/ServerOAuth2ResourceServerDslTests.kt
index 13ede18898..c7c3822481 100644
--- a/config/src/test/kotlin/org/springframework/security/config/web/server/ServerOAuth2ResourceServerDslTests.kt
+++ b/config/src/test/kotlin/org/springframework/security/config/web/server/ServerOAuth2ResourceServerDslTests.kt
@@ -30,9 +30,11 @@ import org.springframework.security.authentication.ReactiveAuthenticationManager
 import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity
 import org.springframework.security.config.test.SpringTestContext
 import org.springframework.security.config.test.SpringTestContextExtension
+import org.springframework.security.core.AuthenticationException
 import org.springframework.security.oauth2.server.resource.authentication.JwtIssuerReactiveAuthenticationManagerResolver
 import org.springframework.security.oauth2.server.resource.web.server.authentication.ServerBearerTokenAuthenticationConverter
 import org.springframework.security.web.server.SecurityWebFilterChain
+import org.springframework.security.web.server.WebFilterExchange
 import org.springframework.security.web.server.authentication.HttpStatusServerEntryPoint
 import org.springframework.security.web.server.authentication.ServerAuthenticationFailureHandler
 import org.springframework.security.web.server.authorization.HttpStatusServerAccessDeniedHandler
@@ -152,7 +154,7 @@ class ServerOAuth2ResourceServerDslTests {
     open class AuthenticationFailureHandlerConfig {
 
         companion object {
-            val FAILURE_HANDLER: ServerAuthenticationFailureHandler = ServerAuthenticationFailureHandler { _, _ -> Mono.empty() }
+            val FAILURE_HANDLER: ServerAuthenticationFailureHandler = MockServerAuthenticationFailureHandler()
         }
 
         @Bean
@@ -171,6 +173,16 @@ class ServerOAuth2ResourceServerDslTests {
         }
     }
 
+    open class MockServerAuthenticationFailureHandler: ServerAuthenticationFailureHandler {
+        override fun onAuthenticationFailure(
+            webFilterExchange: WebFilterExchange?,
+            exception: AuthenticationException?
+        ): Mono<Void> {
+            return Mono.empty()
+        }
+
+    }
+
     @Test
     fun `request when custom bearer token converter configured then custom converter used`() {
         this.spring.register(BearerTokenConverterConfig::class.java).autowire()