diff --git a/config/src/test/groovy/org/springframework/security/config/annotation/web/configurers/PortMapperConfigurerTests.groovy b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/PortMapperConfigurerTests.java
similarity index 50%
rename from config/src/test/groovy/org/springframework/security/config/annotation/web/configurers/PortMapperConfigurerTests.groovy
rename to config/src/test/java/org/springframework/security/config/annotation/web/configurers/PortMapperConfigurerTests.java
index aff2afd2ec..bd50b3f9a6 100644
--- a/config/src/test/groovy/org/springframework/security/config/annotation/web/configurers/PortMapperConfigurerTests.groovy
+++ b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/PortMapperConfigurerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,41 +13,42 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.config.annotation.web.configurers
+package org.springframework.security.config.annotation.web.configurers;
 
-import org.springframework.context.annotation.Configuration
-import org.springframework.security.config.annotation.AnyObjectPostProcessor
-import org.springframework.security.config.annotation.BaseSpringSpec
-import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.junit.Rule;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
-import org.springframework.security.web.access.ExceptionTranslationFilter
-import org.springframework.security.web.context.NullSecurityContextRepository;
-import org.springframework.security.web.context.SecurityContextPersistenceFilter
-import org.springframework.security.web.context.SecurityContextRepository
-import org.springframework.security.web.savedrequest.RequestCache
-import org.springframework.security.web.session.ConcurrentSessionFilter
-import org.springframework.security.web.session.SessionManagementFilter
+import org.springframework.security.config.test.SpringTestRule;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl;
 
 /**
- *
  * @author Rob Winch
+ * @author Josh Cummings
  */
-class PortMapperConfigurerTests extends BaseSpringSpec {
+public class PortMapperConfigurerTests {
+	@Rule
+	public final SpringTestRule spring = new SpringTestRule();
 
-	def "invoke portMapper twice does not override"() {
-		setup:
-			loadConfig(InvokeTwiceDoesNotOverride)
-			request.setServerPort(543)
-		when:
-			springSecurityFilterChain.doFilter(request,response,chain)
-		then:
-			response.redirectedUrl == "https://localhost:123"
+	@Autowired
+	private MockMvc mockMvc;
+
+	@Test
+	public void requestWhenPortMapperTwiceInvokedThenDoesNotOverride() throws Exception {
+		this.spring.register(InvokeTwiceDoesNotOverride.class).autowire();
+
+		this.mockMvc.perform(get("http://localhost:543"))
+			.andExpect(redirectedUrl("https://localhost:123"));
 	}
 
 	@EnableWebSecurity
 	static class InvokeTwiceDoesNotOverride extends WebSecurityConfigurerAdapter {
+
 		@Override
 		protected void configure(HttpSecurity http) throws Exception {
 			http
@@ -57,7 +58,7 @@ class PortMapperConfigurerTests extends BaseSpringSpec {
 				.portMapper()
 					.http(543).mapsTo(123)
 					.and()
-				.portMapper()
+				.portMapper();
 		}
 	}
 }