diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1ef4fbd1..48501ff2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest ]
-        java: ['11', '17']
+        java: ['11', '17', '21']
 
     steps:
       - uses: actions/checkout@v4
diff --git a/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/AbstractBootableJarMojoTestCase.java b/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/AbstractBootableJarMojoTestCase.java
index a3ad004b..4c04b433 100644
--- a/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/AbstractBootableJarMojoTestCase.java
+++ b/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/AbstractBootableJarMojoTestCase.java
@@ -27,7 +27,6 @@
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
@@ -392,15 +391,16 @@ protected String getContent(String url) throws Exception {
     }
 
     protected Process startServer(Path dir, String fileName, String... args) throws Exception {
+        final List<String> serverArgs = List.of(args);
         List<String> cmd = new ArrayList<>();
         cmd.add(getJavaCommand());
-        cmd.addAll(getJvmArgs());
+        cmd.addAll(getJvmArgs(serverArgs.contains("-secmgr")));
         // On windows, to remove when Upgraded to WILDFLY 26.1.1 that should contain XNIO 3.8.7
         // https://issues.redhat.com/browse/XNIO-404
         cmd.add("-Djdk.io.File.enableADS=true");
         cmd.add("-jar");
         cmd.add(dir.resolve("target").resolve(fileName == null ? TEST_FILE : fileName).toAbsolutePath().toString());
-        cmd.addAll(Arrays.asList(args));
+        cmd.addAll(serverArgs);
         final Path out = TestEnvironment.createTempPath("logs", getClass().getName() + "-process.txt");
         final Path parent = out.getParent();
         if (parent != null && Files.notExists(parent)) {
@@ -515,7 +515,7 @@ private static String getJavaCommand() {
         return cmd;
     }
 
-    private static Collection<String> getJvmArgs() {
+    private static Collection<String> getJvmArgs(final boolean securityManager) {
         final Collection<String> result = new ArrayList<>();
         final String defaultArgs = System.getProperty("test.jvm.args");
         if (defaultArgs != null) {
@@ -526,6 +526,9 @@ private static Collection<String> getJvmArgs() {
                 }
             }
         }
+        if (securityManager && TestEnvironment.javaVersion() >= 17) {
+            result.add("-Djava.security.manager=allow");
+        }
         return result;
     }
 
diff --git a/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/TestEnvironment.java b/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/TestEnvironment.java
index 216b683b..3d07a2c7 100644
--- a/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/TestEnvironment.java
+++ b/tests/src/test/java/org/wildfly/plugins/bootablejar/maven/goals/TestEnvironment.java
@@ -33,10 +33,12 @@ class TestEnvironment {
     private static final int MGMT_PORT = getProperty("ts.mgmt.port", 9990);
     private static final String TMP_DIR = System.getProperty("java.io.tmpdir", "target");
     private static final boolean IS_WINDOWS;
+    private static final int JAVA_VERSION;
 
     static {
         final String os = System.getProperty("os.name").toLowerCase(Locale.ROOT);
         IS_WINDOWS = os.contains("win");
+        JAVA_VERSION = Integer.parseInt(System.getProperty("java.vm.specification.version"));
     }
 
     /**
@@ -107,6 +109,15 @@ static Path createTempPath(final String... paths) {
         return Paths.get(TMP_DIR, paths);
     }
 
+    /**
+     * Returns the current Java version.
+     *
+     * @return the java version
+     */
+    static int javaVersion() {
+        return JAVA_VERSION;
+    }
+
     private static int getProperty(final String name, final int dft) {
         final String value = System.getProperty(name);
         return value == null ? dft : Integer.parseInt(value);