'Junit (4.12) is not executing after spring-boot 2.6.2 migration

I have migrated from Spring to Spring-boot version 2.6.2. mvn clean install is successful but none of the junit(version 4.12) is executing. After few research I got to know that Spring-boot 2.4 onwards, JUnit4 has been removed. I tried below solutions which didn't work.

After updating to latest Spring boot version, spring-boot-starter-parent 2.6.2, my tests stop executing

Spring Boot maven unit tests not being executed

javaspringspring-bootjunitjunit4


Solution 1:[1]

I think you ought to migrate to JUnit 5.

Solution 2:[2]

Exclude the junit-jupiter-engine and junit-vintage-engine from the spring-boot-starter-test dependency and then add JUnit 4 dependency in your pom:

<groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
        </exclusion>
        <exclusion>
            <groupId>org.junit.vintage</groupId>
            <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

Solution 3:[3]

JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage.

Refer to: Junit5 doc

If you import junit-jupiter by depending on latest spring-boot-starter-test, it will only run the Junit5 style test cases. So Junit provides junit-vintage to run old Junit3/Junit4 cases and by default it's not contained in the spring-boot-starter-test dependencies. So there are two solutions to keep running Junit4:

  1. Depend on both of junit-jupiter and junit-vintage to support all Junit3/4/5 cases.

     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-test</artifactId>
     <scope>test</scope>
 </dependency>
 <dependency>
     <groupId>org.junit.vintage</groupId>
     <artifactId>junit-vintage-engine</artifactId>
     <scope>test</scope>
 </dependency>

  2. Exclude junit-jupiter from spring-boot-starter-test to run Junit4

     <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-test</artifactId>
     <scope>test</scope>
     <exclusions>
         <exclusion>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
         </exclusion>
     </exclusions>
 </dependency>

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Sergey Tsypanov
Solution 2 Ilze
Solution 3 Yun-tao Yang

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