diff --git a/config/src/test/groovy/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerTests.groovy b/config/src/test/groovy/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerTests.groovy
deleted file mode 100644
index ee003e43e6..0000000000
--- a/config/src/test/groovy/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerTests.groovy
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright 2002-2016 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.config.annotation.authentication
-
-import org.springframework.security.authentication.AuthenticationManager
-import org.springframework.security.authentication.UsernamePasswordAuthenticationToken
-import org.springframework.security.config.annotation.BaseSpringSpec
-
-import static org.springframework.security.config.annotation.authentication.PasswordEncoderConfigurerConfigs.PasswordEncoderConfig
-import static org.springframework.security.config.annotation.authentication.PasswordEncoderConfigurerConfigs.PasswordEncoderNoAuthManagerLoadsConfig;
-
-/**
- *
- * @author Rob Winch
- *
- */
-class PasswordEncoderConfigurerTests extends BaseSpringSpec {
-	def "password-encoder@ref with No AuthenticationManager Bean"() {
-		when:
-			loadConfig(PasswordEncoderNoAuthManagerLoadsConfig)
-		then:
-			noExceptionThrown()
-	}
-
-	def "password-encoder@ref with AuthenticationManagerBuilder"() {
-		when:
-			loadConfig(PasswordEncoderConfig)
-			AuthenticationManager authMgr = authenticationManager()
-		then:
-			authMgr.authenticate(new UsernamePasswordAuthenticationToken("user", "password"))
-	}
-}
diff --git a/config/src/test/groovy/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerConfigs.java b/config/src/test/java/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerTests.java
similarity index 67%
rename from config/src/test/groovy/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerConfigs.java
rename to config/src/test/java/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerTests.java
index 0e3a077fcb..ea658aebb4 100644
--- a/config/src/test/groovy/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerConfigs.java
+++ b/config/src/test/java/org/springframework/security/config/annotation/authentication/PasswordEncoderConfigurerTests.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.
@@ -13,26 +13,39 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.security.config.annotation.authentication;
 
+import org.junit.Rule;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
 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.config.test.SpringTestRule;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestBuilders.formLogin;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated;
 
 /**
- * Class Containing the {@link Configuration} for {@link PasswordEncoderConfigurerTests}.
- * Separate to ensure the configuration compiles in Java (i.e. we are not using hidden
- * methods).
- *
  * @author Rob Winch
- * @since 3.2
  */
-public class PasswordEncoderConfigurerConfigs {
+public class PasswordEncoderConfigurerTests {
+
+	@Rule
+	public final SpringTestRule spring = new SpringTestRule();
+
+	@Autowired
+	private MockMvc mockMvc;
+
+	@Test
+	public void passwordEncoderRefWhenNoAuthenticationManagerBeanThenNoExceptionThrown() {
+		this.spring.register(PasswordEncoderConfig.class).autowire();
+	}
 
 	@EnableWebSecurity
 	static class PasswordEncoderConfig extends WebSecurityConfigurerAdapter {
@@ -46,12 +59,6 @@ public class PasswordEncoderConfigurerConfigs {
 		}
 		// @formatter:on
 
-		@Bean
-		@Override
-		public AuthenticationManager authenticationManagerBean() throws Exception {
-			return super.authenticationManagerBean();
-		}
-
 		@Override
 		protected void configure(HttpSecurity http) throws Exception {
 		}
@@ -62,9 +69,17 @@ public class PasswordEncoderConfigurerConfigs {
 		}
 	}
 
+	@Test
+	public void passwordEncoderRefWhenAuthenticationManagerBuilderThenAuthenticationSuccess() throws Exception {
+		this.spring.register(PasswordEncoderNoAuthManagerLoadsConfig.class).autowire();
+
+		this.mockMvc.perform(formLogin())
+			.andExpect(authenticated());
+	}
+
 	@EnableWebSecurity
 	static class PasswordEncoderNoAuthManagerLoadsConfig extends
-			WebSecurityConfigurerAdapter {
+		WebSecurityConfigurerAdapter {
 		// @formatter:off
 		protected void configure(AuthenticationManagerBuilder auth) throws Exception {
 			BCryptPasswordEncoder encoder = passwordEncoder();