diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestDatabaseAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestDatabaseAutoConfiguration.java
index 2ff86acdeb..aa3ce107e7 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestDatabaseAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestDatabaseAutoConfiguration.java
@@ -50,11 +50,12 @@ import org.springframework.util.ObjectUtils;
  * Auto-configuration for a test database.
  *
  * @author Phillip Webb
+ * @since 1.4.0
  * @see AutoConfigureTestDatabase
  */
 @Configuration
 @AutoConfigureBefore(DataSourceAutoConfiguration.class)
-class TestDatabaseAutoConfiguration {
+public class TestDatabaseAutoConfiguration {
 
 	private final Environment environment;
 
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestEntityManagerAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestEntityManagerAutoConfiguration.java
index 756dfea256..27790a4cd3 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestEntityManagerAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/orm/jpa/TestEntityManagerAutoConfiguration.java
@@ -29,12 +29,13 @@ import org.springframework.context.annotation.Configuration;
  * Auto-configuration for {@link TestEntityManager}.
  *
  * @author Phillip Webb
+ * @since 1.4.0
  * @see AutoConfigureTestEntityManager
  */
 @Configuration
 @ConditionalOnClass({ EntityManagerFactory.class })
 @AutoConfigureAfter(HibernateJpaAutoConfiguration.class)
-class TestEntityManagerAutoConfiguration {
+public class TestEntityManagerAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsAutoConfiguration.java
index b1536c7336..55772c1402 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsAutoConfiguration.java
@@ -33,11 +33,12 @@ import org.springframework.restdocs.mockmvc.RestDocumentationResultHandler;
  * {@link EnableAutoConfiguration Auto-configuration} for Spring REST Docs.
  *
  * @author Andy Wilkinson
+ * @since 1.4.0
  */
 @Configuration
 @ConditionalOnWebApplication
 @EnableConfigurationProperties
-class RestDocsAutoConfiguration {
+public class RestDocsAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean(MockMvcRestDocumentationConfigurer.class)
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/MockRestServiceServerAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/MockRestServiceServerAutoConfiguration.java
index ffad5c12fb..a58aec0801 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/MockRestServiceServerAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/MockRestServiceServerAutoConfiguration.java
@@ -38,11 +38,12 @@ import org.springframework.web.client.RestTemplate;
  * Auto-configuration for {@link MockRestServiceServer} support.
  *
  * @author Phillip Webb
+ * @since 1.4.0
  * @see AutoConfigureMockRestServiceServer
  */
 @Configuration
 @ConditionalOnProperty(prefix = "spring.test.webclient.mockrestserviceserver", name = "enabled")
-class MockRestServiceServerAutoConfiguration {
+public class MockRestServiceServerAutoConfiguration {
 
 	@Bean
 	public MockServerRestTemplateCustomizer mockServerRestTemplateCustomizer() {
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/WebClientRestTemplateAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/WebClientRestTemplateAutoConfiguration.java
index e3ef27ad62..8d16ffe5f1 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/WebClientRestTemplateAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/client/WebClientRestTemplateAutoConfiguration.java
@@ -29,12 +29,13 @@ import org.springframework.web.client.RestTemplate;
  * {@link AutoConfigureWebClient#registerRestTemplate()} is {@code true}.
  *
  * @author Phillip Webb
+ * @since 1.4.0
  * @see AutoConfigureMockRestServiceServer
  */
 @Configuration
 @ConditionalOnProperty(prefix = "spring.test.webclient", name = "register-rest-template")
 @AutoConfigureAfter(WebClientAutoConfiguration.class)
-class WebClientRestTemplateAutoConfiguration {
+public class WebClientRestTemplateAutoConfiguration {
 
 	@Bean
 	public RestTemplate restTemplate(RestTemplateBuilder builder) {
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcAutoConfiguration.java
index 9a48362c1d..24cc252b6a 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcAutoConfiguration.java
@@ -38,12 +38,13 @@ import org.springframework.web.context.WebApplicationContext;
  * @author Phillip Webb
  * @author Andy Wilkinson
  * @see AutoConfigureWebMvc
+ * @since 1.4.0
  */
 @Configuration
 @ConditionalOnWebApplication
 @AutoConfigureAfter(WebMvcAutoConfiguration.class)
 @EnableConfigurationProperties
-class MockMvcAutoConfiguration {
+public class MockMvcAutoConfiguration {
 
 	private final WebApplicationContext context;
 
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcSecurityAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcSecurityAutoConfiguration.java
index 6c8331d1e7..f683d2d4ed 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcSecurityAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcSecurityAutoConfiguration.java
@@ -26,6 +26,7 @@ import org.springframework.context.annotation.Import;
  * Auto-configuration for Spring Security's testing support.
  *
  * @author Andy Wilkinson
+ * @since 1.4.0
  */
 @Configuration
 @ConditionalOnProperty(prefix = "spring.test.mockmvc", name = "secure", havingValue = "true", matchIfMissing = true)
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebClientAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebClientAutoConfiguration.java
index 6cecf2722b..b884e28104 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebClientAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebClientAutoConfiguration.java
@@ -34,12 +34,13 @@ import org.springframework.test.web.servlet.htmlunit.MockMvcWebClientBuilder;
  * Auto-configuration for HtmlUnit {@link WebClient} MockMVC integration.
  *
  * @author Phillip Webb
+ * @since 1.4.0
  */
 @Configuration
 @ConditionalOnClass(WebClient.class)
 @AutoConfigureAfter(MockMvcAutoConfiguration.class)
 @ConditionalOnProperty(prefix = "spring.test.webmvc.webclient", name = "enabled", matchIfMissing = true)
-class MockMvcWebClientAutoConfiguration {
+public class MockMvcWebClientAutoConfiguration {
 
 	private final Environment environment;
 
diff --git a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebDriverAutoConfiguration.java b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebDriverAutoConfiguration.java
index 999555efa0..5fadb29625 100644
--- a/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebDriverAutoConfiguration.java
+++ b/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcWebDriverAutoConfiguration.java
@@ -36,12 +36,13 @@ import org.springframework.test.web.servlet.htmlunit.webdriver.MockMvcHtmlUnitDr
  * Auto-configuration for Selenium {@link WebDriver} MockMVC integration.
  *
  * @author Phillip Webb
+ * @since 1.4.0
  */
 @Configuration
 @ConditionalOnClass(HtmlUnitDriver.class)
 @AutoConfigureAfter(MockMvcAutoConfiguration.class)
 @ConditionalOnProperty(prefix = "spring.test.webmvc.webdriver", name = "enabled", matchIfMissing = true)
-class MockMvcWebDriverAutoConfiguration {
+public class MockMvcWebDriverAutoConfiguration {
 
 	private final Environment environment;