diff --git a/pom.xml b/pom.xml
index 7ea33af..a897326 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>5.24</version>
+    <version>5.25</version>
     <relativePath />
   </parent>
 
@@ -29,6 +29,7 @@
     <jenkins.version>${jenkins.baseline}.3</jenkins.version>
     <spotbugs.effort>Max</spotbugs.effort>
     <spotless.check.skip>false</spotless.check.skip>
+    <ban-junit4-imports.skip>false</ban-junit4-imports.skip>
   </properties>
 
   <dependencyManagement>
@@ -71,7 +72,7 @@
     </dependency>
     <dependency>
       <groupId>org.testcontainers</groupId>
-      <artifactId>testcontainers</artifactId>
+      <artifactId>junit-jupiter</artifactId>
       <version>1.21.3</version>
       <scope>test</scope>
       <exclusions>
diff --git a/src/test/java/org/jenkinsci/plugins/reverse_proxy_auth/docker/PlanetExpressTest.java b/src/test/java/org/jenkinsci/plugins/reverse_proxy_auth/docker/PlanetExpressTest.java
index cf972d8..17d6ba5 100644
--- a/src/test/java/org/jenkinsci/plugins/reverse_proxy_auth/docker/PlanetExpressTest.java
+++ b/src/test/java/org/jenkinsci/plugins/reverse_proxy_auth/docker/PlanetExpressTest.java
@@ -2,60 +2,60 @@
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.StringContains.containsString;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assume.assumeFalse;
-import static org.junit.Assume.assumeTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assumptions.assumeFalse;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 import hudson.Functions;
 import hudson.tasks.MailAddressResolver;
 import hudson.util.Secret;
 import org.jenkinsci.plugins.reverse_proxy_auth.ReverseProxySecurityRealm;
-import org.junit.BeforeClass;
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
 import org.jvnet.hudson.test.JenkinsRule;
-import org.jvnet.hudson.test.RealJenkinsRule;
+import org.jvnet.hudson.test.junit.jupiter.RealJenkinsExtension;
 import org.springframework.security.ldap.userdetails.LdapUserDetails;
 import org.testcontainers.DockerClientFactory;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 
 /**
  * Tests the plugin when logging in to rroemhild/test-openldap
  */
-public class PlanetExpressTest {
+@Testcontainers(disabledWithoutDocker = true)
+class PlanetExpressTest {
 
-    static final String TEST_IMAGE =
+    private static final String TEST_IMAGE =
             "ghcr.io/rroemhild/docker-test-openldap:v2.5.0@sha256:3470e15c60119a1c0392cc162cdce71edfb42b55affdc69da574012f956317cd";
-    static final String DN = "dc=planetexpress,dc=com";
-    static final String MANAGER_DN = "cn=admin,dc=planetexpress,dc=com";
-    static final String MANAGER_SECRET = "GoodNewsEveryone";
+    private static final String DN = "dc=planetexpress,dc=com";
+    private static final String MANAGER_DN = "cn=admin,dc=planetexpress,dc=com";
+    private static final String MANAGER_SECRET = "GoodNewsEveryone";
 
-    @BeforeClass
-    public static void requiresDocker() {
-        assumeTrue(DockerClientFactory.instance().isDockerAvailable());
-    }
-
-    @BeforeClass
-    public static void linuxOnly() {
-        assumeFalse(
-                "Windows CI builders now have Docker installed…but it does not support Linux images",
-                Functions.isWindows() && System.getenv("JENKINS_URL") != null);
-    }
+    @RegisterExtension
+    private final RealJenkinsExtension extension = new RealJenkinsExtension();
 
     @SuppressWarnings("rawtypes")
-    @Rule
-    public GenericContainer container = new GenericContainer(TEST_IMAGE).withExposedPorts(10389);
+    @Container
+    private final GenericContainer container = new GenericContainer(TEST_IMAGE).withExposedPorts(10389);
 
-    @Rule
-    public RealJenkinsRule rr = new RealJenkinsRule();
+    @BeforeAll
+    static void setUp() {
+        assumeTrue(DockerClientFactory.instance().isDockerAvailable());
+        assumeFalse(
+                Functions.isWindows() && System.getenv("JENKINS_URL") != null,
+                "Windows CI builders now have Docker installed…but it does not support Linux images");
+    }
 
     @Test
-    public void login() throws Throwable {
+    void login() throws Throwable {
         String server = container.getHost() + ":" + container.getFirstMappedPort();
-        rr.then(new Login(server));
+        extension.then(new Login(server));
     }
 
-    private static class Login implements RealJenkinsRule.Step {
+    private static class Login implements RealJenkinsExtension.Step {
+
         private final String server;
 
         Login(String server) {