See Database containers for documentation and usage that is common to all relational database container types.

Add the following dependency to your pom.xml/build.gradle file:

testImplementation "org.testcontainers:postgresql:{{latest_version}}"

<dependency>
    <groupId>org.testcontainers</groupId>
    <artifactId>postgresql</artifactId>
    <version>{{latest_version}}</version>
    <scope>test</scope>
</dependency>

!!! hint Adding this Testcontainers library JAR will not automatically add a database driver JAR to your project. You should ensure that your project also has a suitable database driver as a dependency.