<dependency> <groupId>software.amazon.awssdk</groupId> <artifactId>test-utils</artifactId> <version>2.15.0</version> <scope>test</scope> </dependency> import org.junit.Test; import org.junit.runner.RunWith; import software.amazon.awssdk.services.s3.S3Client; import software.amazon.awssdk.testutils.service.AwsTestBase; @RunWith(MockitoJUnitRunner.class) public class S3ServiceTest extends AwsTestBase { @Test public void testS3Service() { S3Client s3ClientMock = mock(S3Client.class); // ... } }