diff --git a/src/XML/ds/X509CRL.php b/src/XML/ds/X509CRL.php
new file mode 100644
index 00000000..e40c3c77
--- /dev/null
+++ b/src/XML/ds/X509CRL.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\XML\ds;
+
+use SimpleSAML\XML\Base64ElementTrait;
+
+/**
+ * Class representing a ds:X509CRL element.
+ *
+ * @package simplesaml/xml-security
+ */
+final class X509CRL extends AbstractDsElement
+{
+    use Base64ElementTrait;
+
+
+    /**
+     * @param string $content
+     */
+    public function __construct(string $content)
+    {
+        $this->setContent($content);
+    }
+}
diff --git a/src/XML/ds/X509SKI.php b/src/XML/ds/X509SKI.php
new file mode 100644
index 00000000..0bb61594
--- /dev/null
+++ b/src/XML/ds/X509SKI.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\XML\ds;
+
+use SimpleSAML\XML\Base64ElementTrait;
+
+/**
+ * Class representing a ds:X509SKI element.
+ *
+ * @package simplesaml/xml-security
+ */
+final class X509SKI extends AbstractDsElement
+{
+    use Base64ElementTrait;
+
+
+    /**
+     * @param string $content
+     */
+    public function __construct(string $content)
+    {
+        $this->setContent($content);
+    }
+}
diff --git a/tests/XML/ds/X509CRLTest.php b/tests/XML/ds/X509CRLTest.php
new file mode 100644
index 00000000..c59beb9e
--- /dev/null
+++ b/tests/XML/ds/X509CRLTest.php
@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\Test\XML\ds;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+use SimpleSAML\XMLSecurity\Test\XML\XMLDumper;
+use SimpleSAML\XMLSecurity\XML\ds\AbstractDsElement;
+use SimpleSAML\XMLSecurity\XML\ds\X509CRL;
+
+use function dirname;
+use function strval;
+
+/**
+ * Class \SimpleSAML\XMLSecurity\Test\XML\ds\X509CRLTest
+ *
+ * @package simplesamlphp/xml-security
+ */
+#[CoversClass(AbstractDsElement::class)]
+#[CoversClass(X509CRL::class)]
+final class X509CRLTest extends TestCase
+{
+    use SerializableElementTestTrait;
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$testedClass = X509CRL::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 3) . '/resources/xml/ds_X509CRL.xml',
+        );
+    }
+
+
+    /**
+     */
+    public function testMarshalling(): void
+    {
+        $X509CRL = new X509CRL('/CTj03d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=');
+
+        $this->assertEquals(
+            XMLDumper::dumpDOMDocumentXMLWithBase64Content(self::$xmlRepresentation),
+            strval($X509CRL),
+        );
+    }
+
+
+    /**
+     */
+    public function testMarshallingNotBase64(): void
+    {
+        $this->expectException(AssertionFailedException::class);
+        new X509CRL('/CTj3d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=');
+    }
+}
diff --git a/tests/XML/ds/X509SKITest.php b/tests/XML/ds/X509SKITest.php
new file mode 100644
index 00000000..a3eb849d
--- /dev/null
+++ b/tests/XML/ds/X509SKITest.php
@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\Test\XML\ds;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+use SimpleSAML\XMLSecurity\Test\XML\XMLDumper;
+use SimpleSAML\XMLSecurity\XML\ds\AbstractDsElement;
+use SimpleSAML\XMLSecurity\XML\ds\X509SKI;
+
+use function dirname;
+use function strval;
+
+/**
+ * Class \SimpleSAML\XMLSecurity\Test\XML\ds\X509SKITest
+ *
+ * @package simplesamlphp/xml-security
+ */
+#[CoversClass(AbstractDsElement::class)]
+#[CoversClass(X509SKI::class)]
+final class X509SKITest extends TestCase
+{
+    use SerializableElementTestTrait;
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$testedClass = X509SKI::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 3) . '/resources/xml/ds_X509SKI.xml',
+        );
+    }
+
+
+    /**
+     */
+    public function testMarshalling(): void
+    {
+        $X509SKI = new X509SKI('/CTj03d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=');
+
+        $this->assertEquals(
+            XMLDumper::dumpDOMDocumentXMLWithBase64Content(self::$xmlRepresentation),
+            strval($X509SKI),
+        );
+    }
+
+
+    /**
+     */
+    public function testMarshallingNotBase64(): void
+    {
+        $this->expectException(AssertionFailedException::class);
+        new X509SKI('/CTj3d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=');
+    }
+}
diff --git a/tests/resources/xml/ds_X509CRL.xml b/tests/resources/xml/ds_X509CRL.xml
new file mode 100644
index 00000000..563042ad
--- /dev/null
+++ b/tests/resources/xml/ds_X509CRL.xml
@@ -0,0 +1 @@
+<ds:X509CRL xmlns:ds="http://www.w3.org/2000/09/xmldsig#">/CTj03d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=</ds:X509CRL>
diff --git a/tests/resources/xml/ds_X509SKI.xml b/tests/resources/xml/ds_X509SKI.xml
new file mode 100644
index 00000000..f6bba588
--- /dev/null
+++ b/tests/resources/xml/ds_X509SKI.xml
@@ -0,0 +1 @@
+<ds:X509SKI xmlns:ds="http://www.w3.org/2000/09/xmldsig#">/CTj03d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=</ds:X509SKI>