diff --git a/spring-session-samples/spring-session-sample-boot-mongodb-reactive/spring-session-sample-boot-mongodb-reactive.gradle b/spring-session-samples/spring-session-sample-boot-mongodb-reactive/spring-session-sample-boot-mongodb-reactive.gradle
index bdfdaf77..cfca69a5 100644
--- a/spring-session-samples/spring-session-sample-boot-mongodb-reactive/spring-session-sample-boot-mongodb-reactive.gradle
+++ b/spring-session-samples/spring-session-sample-boot-mongodb-reactive/spring-session-sample-boot-mongodb-reactive.gradle
@@ -5,7 +5,7 @@ dependencies {
 	implementation  "org.springframework.boot:spring-boot-starter-webflux"
 	implementation  "org.springframework.boot:spring-boot-starter-thymeleaf"
 	implementation  "org.springframework.boot:spring-boot-starter-data-mongodb-reactive"
-    implementation  "org.testcontainers:mongodb"
+	implementation  "org.testcontainers:mongodb"
 
 	testImplementation "org.springframework.boot:spring-boot-starter-test"
 	testImplementation "org.seleniumhq.selenium:htmlunit-driver"
diff --git a/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoReactiveApplication.java b/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoReactiveApplication.java
index 9b25c27f..d11245cc 100644
--- a/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoReactiveApplication.java
+++ b/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoReactiveApplication.java
@@ -16,6 +16,12 @@
 
 package org.springframework.session.mongodb.examples;
 
+import java.util.HashMap;
+import java.util.Map;
+
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.utility.DockerImageName;
+
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ApplicationContextInitializer;
@@ -23,11 +29,6 @@ import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
 import org.springframework.session.data.mongo.config.annotation.web.reactive.EnableMongoWebSession;
-import org.testcontainers.containers.MongoDBContainer;
-import org.testcontainers.utility.DockerImageName;
-
-import java.util.HashMap;
-import java.util.Map;
 
 /**
  * Pure Spring-based application (using Spring Boot for dependency management), hence no
@@ -40,16 +41,25 @@ import java.util.Map;
 @EnableMongoWebSession
 public class SpringSessionMongoReactiveApplication {
 
+	public static void main(String[] args) {
+		SpringApplication application = new SpringApplication(SpringSessionMongoReactiveApplication.class);
+		application.addInitializers(new Initializer());
+		application.run(args);
+	}
+
 	/**
 	 * Use Testcontainers to managed MongoDB through Docker.
 	 * <p>
-	 * @see https://bsideup.github.io/posts/local_development_with_testcontainers/
+	 *
+	 * @see <a href=
+	 * "https://bsideup.github.io/posts/local_development_with_testcontainers/">Local
+	 * Development with Testcontainers</a>
 	 */
 	static class Initializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
 
 		static MongoDBContainer mongo = new MongoDBContainer(DockerImageName.parse("mongo:5.0"));
 
-		public static Map<String, String> getProperties() {
+		private static Map<String, String> getProperties() {
 			mongo.start();
 
 			HashMap<String, String> properties = new HashMap<>();
@@ -63,12 +73,7 @@ public class SpringSessionMongoReactiveApplication {
 			ConfigurableEnvironment env = context.getEnvironment();
 			env.getPropertySources().addFirst(new MapPropertySource("testcontainers", (Map) getProperties()));
 		}
+
 	}
 
-
-	public static void main(String[] args) {
-		SpringApplication application = new SpringApplication(SpringSessionMongoReactiveApplication.class);
-		application.addInitializers(new Initializer());
-		application.run(args);
-	}
 }
diff --git a/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/test/java/org/springframework/session/mongodb/examples/AttributeTests.java b/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/test/java/org/springframework/session/mongodb/examples/AttributeTests.java
index 64dbac61..00468e15 100644
--- a/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/test/java/org/springframework/session/mongodb/examples/AttributeTests.java
+++ b/spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/test/java/org/springframework/session/mongodb/examples/AttributeTests.java
@@ -16,12 +16,15 @@
 
 package org.springframework.session.mongodb.examples;
 
+import java.util.List;
+
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.htmlunit.HtmlUnitDriver;
+
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.session.mongodb.examples.pages.HomePage;
@@ -29,8 +32,6 @@ import org.springframework.session.mongodb.examples.pages.HomePage.Attribute;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 
-import java.util.List;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
diff --git a/spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoTraditionalBoot.java b/spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoTraditionalBoot.java
index 91b72c23..63a78f71 100644
--- a/spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoTraditionalBoot.java
+++ b/spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoTraditionalBoot.java
@@ -16,17 +16,18 @@
 
 package org.springframework.session.mongodb.examples;
 
+import java.util.HashMap;
+import java.util.Map;
+
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.utility.DockerImageName;
+
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
-import org.testcontainers.containers.MongoDBContainer;
-import org.testcontainers.utility.DockerImageName;
-
-import java.util.HashMap;
-import java.util.Map;
 
 /**
  * @author Rob Winch
@@ -34,16 +35,25 @@ import java.util.Map;
 @SpringBootApplication
 public class SpringSessionMongoTraditionalBoot {
 
+	public static void main(String[] args) {
+		SpringApplication application = new SpringApplication(SpringSessionMongoTraditionalBoot.class);
+		application.addInitializers(new Initializer());
+		application.run(args);
+	}
+
 	/**
 	 * Use Testcontainers to managed MongoDB through Docker.
 	 * <p>
-	 * @see https://bsideup.github.io/posts/local_development_with_testcontainers/
+	 *
+	 * @see <a href=
+	 * "https://bsideup.github.io/posts/local_development_with_testcontainers/">Local
+	 * Developmenet with Testcontainers</a>
 	 */
 	static class Initializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
 
 		static MongoDBContainer mongo = new MongoDBContainer(DockerImageName.parse("mongo:5.0"));
 
-		public static Map<String, String> getProperties() {
+		private static Map<String, String> getProperties() {
 			mongo.start();
 
 			HashMap<String, String> properties = new HashMap<>();
@@ -57,11 +67,7 @@ public class SpringSessionMongoTraditionalBoot {
 			ConfigurableEnvironment env = context.getEnvironment();
 			env.getPropertySources().addFirst(new MapPropertySource("testcontainers", (Map) getProperties()));
 		}
+
 	}
 
-	public static void main(String[] args) {
-		SpringApplication application = new SpringApplication(SpringSessionMongoTraditionalBoot.class);
-		application.addInitializers(new Initializer());
-		application.run(args);
-	}
 }