diff --git a/config/src/test/groovy/org/springframework/security/config/annotation/web/configurers/AbstractConfigAttributeRequestMatcherRegistryTests.groovy b/config/src/test/groovy/org/springframework/security/config/annotation/web/configurers/AbstractConfigAttributeRequestMatcherRegistryTests.groovy
deleted file mode 100644
index 4870532a505..00000000000
--- a/config/src/test/groovy/org/springframework/security/config/annotation/web/configurers/AbstractConfigAttributeRequestMatcherRegistryTests.groovy
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright 2002-2013 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.web.configurers;
-
-import org.springframework.http.HttpMethod
-import org.springframework.security.access.AccessDecisionVoter
-import org.springframework.security.config.annotation.web.AbstractRequestMatcherRegistry
-import org.springframework.security.web.util.matcher.AntPathRequestMatcher
-import org.springframework.security.web.util.matcher.RegexRequestMatcher
-import org.springframework.security.web.util.matcher.RequestMatcher
-
-import spock.lang.Specification
-
-/**
- * @author Rob Winch
- *
- */
-class AbstractConfigAttributeRequestMatcherRegistryTests extends Specification {
-	ConcreteAbstractRequestMatcherMappingConfigurer registry = new ConcreteAbstractRequestMatcherMappingConfigurer()
-
-	def "regexMatchers(GET,'/a.*') uses RegexRequestMatcher"() {
-		when:
-		def matchers = registry.regexMatchers(HttpMethod.GET,"/a.*")
-		then: 'matcher is a RegexRequestMatcher'
-		matchers.collect {it.class } == [RegexRequestMatcher]
-	}
-
-	def "regexMatchers('/a.*') uses RegexRequestMatcher"() {
-		when:
-		def matchers = registry.regexMatchers("/a.*")
-		then: 'matcher is a RegexRequestMatcher'
-		matchers.collect {it.class } == [RegexRequestMatcher]
-	}
-
-	def "antMatchers(GET,'/a.*') uses AntPathRequestMatcher"() {
-		when:
-		def matchers = registry.antMatchers(HttpMethod.GET, "/a.*")
-		then: 'matcher is a RegexRequestMatcher'
-		matchers.collect {it.class } == [AntPathRequestMatcher]
-	}
-
-	def "antMatchers('/a.*') uses AntPathRequestMatcher"() {
-		when:
-		def matchers = registry.antMatchers("/a.*")
-		then: 'matcher is a AntPathRequestMatcher'
-		matchers.collect {it.class } == [AntPathRequestMatcher]
-	}
-
-	static class ConcreteAbstractRequestMatcherMappingConfigurer extends AbstractConfigAttributeRequestMatcherRegistry<List<RequestMatcher>> {
-		List<AccessDecisionVoter> decisionVoters() {
-			return null;
-		}
-
-		List<RequestMatcher> chainRequestMatchersInternal(List<RequestMatcher> requestMatchers) {
-			return requestMatchers;
-		}
-
-		List<RequestMatcher> mvcMatchers(String... mvcPatterns) {
-			null
-		}
-
-		List<RequestMatcher> mvcMatchers(HttpMethod method, String... mvcPatterns) {
-			null
-		}
-	}
-}
diff --git a/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AbstractConfigAttributeRequestMatcherRegistryTests.java b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AbstractConfigAttributeRequestMatcherRegistryTests.java
new file mode 100644
index 00000000000..cf9044cccc2
--- /dev/null
+++ b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AbstractConfigAttributeRequestMatcherRegistryTests.java
@@ -0,0 +1,92 @@
+/*
+ * 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.
+ * 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.web.configurers;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.http.HttpMethod;
+import org.springframework.security.access.AccessDecisionVoter;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+import org.springframework.security.web.util.matcher.RegexRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.List;
+
+public class AbstractConfigAttributeRequestMatcherRegistryTests {
+	private ConcreteAbstractRequestMatcherMappingConfigurer registry;
+
+	@Before
+	public void setup() {
+		registry = new ConcreteAbstractRequestMatcherMappingConfigurer();
+	}
+
+	@Test
+	public void testGetRequestMatcherIsTypeRegexMatcher(){
+		List<RequestMatcher> requestMatchers = registry.regexMatchers(HttpMethod.GET, "/a.*");
+
+		for (RequestMatcher requestMatcher : requestMatchers) {
+			assertThat(requestMatcher).isInstanceOf(RegexRequestMatcher.class);
+		}
+	}
+
+	@Test
+	public void testRequestMatcherIsTypeRegexMatcher(){
+		List<RequestMatcher> requestMatchers = registry.regexMatchers( "/a.*");
+
+		for (RequestMatcher requestMatcher : requestMatchers) {
+			assertThat(requestMatcher).isInstanceOf(RegexRequestMatcher.class);
+		}
+	}
+
+	@Test
+	public void testGetRequestMatcherIsTypeAntPathRequestMatcher(){
+		List<RequestMatcher> requestMatchers = registry.antMatchers(HttpMethod.GET, "/a.*");
+
+		for (RequestMatcher requestMatcher : requestMatchers) {
+			assertThat(requestMatcher).isInstanceOf(AntPathRequestMatcher.class);
+		}
+	}
+
+	@Test
+	public void testRequestMatcherIsTypeAntPathRequestMatcher(){
+		List<RequestMatcher> requestMatchers = registry.antMatchers("/a.*");
+
+		for (RequestMatcher requestMatcher : requestMatchers) {
+			assertThat(requestMatcher).isInstanceOf(AntPathRequestMatcher.class);
+		}
+	}
+
+	static class ConcreteAbstractRequestMatcherMappingConfigurer extends AbstractConfigAttributeRequestMatcherRegistry<List<RequestMatcher>> {
+		List<AccessDecisionVoter> decisionVoters() {
+			return null;
+		}
+
+		protected List<RequestMatcher> chainRequestMatchersInternal(List<RequestMatcher> requestMatchers) {
+			return requestMatchers;
+		}
+
+		public List<RequestMatcher> mvcMatchers(String... mvcPatterns) {
+			return null;
+		}
+
+		public List<RequestMatcher> mvcMatchers(HttpMethod method, String... mvcPatterns) {
+			return null;
+		}
+	}
+}