Spring Boot 2.4.0 M1 Release Notes

Spring Boot 2.4.0 M1 Release Notes

Upgrading from Spring Boot 2.3

JUnit 5’s Vintage Engine Removed from spring-boot-starter-test

If you upgrade to Spring Boot 2.4 and see test compilation errors for JUnit classes such as org.junit.Test, this may be because JUnit 5’s vintage engine has been removed from spring-boot-starter-test. The vintage engine allows tests written with JUnit 4 to be run by JUnit 5. If you do not want to migrate your tests to JUnit 5 and wish to continue using JUnit 4, add a dependency on the Vintage Engine, as shown in the following example for Maven:

<dependency>
    <groupId>org.junit.vintage</groupId>
    <artifactId>junit-vintage-engine</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.hamcrest</groupId>
            <artifactId>hamcrest-core</artifactId>
        </exclusion>
    </exclusions>
</dependency>

If you are using Gradle, the equivalent configuration is shown in the following example:

testImplementation("org.junit.vintage:junit-vintage-engine") {
    exclude group: "org.hamcrest", module: "hamcrest-core"
}

Deprecations from Spring Boot 2.3

Minimum requirements changes

New and Noteworthy

Tip	Check the configuration changelog for a complete overview of the changes in configuration.

Miscellaneous

Apart from the changes listed above, there have also been lots of minor tweaks and improvements including:

Deprecations in Spring Boot 2.4.0 M1