diff --git a/src/wp-includes/abilities-api/class-wp-abilities-registry.php b/src/wp-includes/abilities-api/class-wp-abilities-registry.php
index ecd6dc2785e70..02fedb8865d17 100644
--- a/src/wp-includes/abilities-api/class-wp-abilities-registry.php
+++ b/src/wp-includes/abilities-api/class-wp-abilities-registry.php
@@ -44,8 +44,8 @@ final class WP_Abilities_Registry {
 	 * @see wp_register_ability()
 	 *
 	 * @param string               $name The name of the ability. The name must be a string containing a namespace
-	 *                                   prefix, i.e. `my-plugin/my-ability`. It can only contain lowercase
-	 *                                   alphanumeric characters, dashes and the forward slash.
+	 *                                   prefix, i.e. `my-plugin/my-ability` or `my-plugin/v1/my-ability`. It can
+	 *                                   only contain lowercase alphanumeric characters, dashes and the forward slash.
 	 * @param array<string, mixed> $args {
 	 *     An associative array of arguments for the ability.
 	 *
@@ -78,11 +78,11 @@ final class WP_Abilities_Registry {
 	 * @return WP_Ability|null The registered ability instance on success, null on failure.
 	 */
 	public function register( string $name, array $args ): ?WP_Ability {
-		if ( ! preg_match( '/^[a-z0-9-]+\/[a-z0-9-]+$/', $name ) ) {
+		if ( ! preg_match( '/^[a-z0-9-]+\/([a-z0-9-]+\/)?[a-z0-9-]+$/', $name ) ) {
 			_doing_it_wrong(
 				__METHOD__,
 				__(
-					'Ability name must be a string containing a namespace prefix, i.e. "my-plugin/my-ability". It can only contain lowercase alphanumeric characters, dashes and the forward slash.'
+					'Ability name must be a string containing a namespace prefix, i.e. "my-plugin/my-ability" or "my-plugin/v1/my-ability". It can only contain lowercase alphanumeric characters, dashes and the forward slash.'
 				),
 				'6.9.0'
 			);
diff --git a/tests/phpunit/tests/abilities-api/wpAbilitiesRegistry.php b/tests/phpunit/tests/abilities-api/wpAbilitiesRegistry.php
index badd81c3b626a..a6b1b1ec4c0c8 100644
--- a/tests/phpunit/tests/abilities-api/wpAbilitiesRegistry.php
+++ b/tests/phpunit/tests/abilities-api/wpAbilitiesRegistry.php
@@ -134,6 +134,20 @@ public function test_register_invalid_uppercase_characters_in_name() {
 		$this->assertNull( $result );
 	}
 
+	/**
+	 * Should reject ability name with more than two slashes.
+	 *
+	 * @ticket 64098
+	 *
+	 * @covers WP_Abilities_Registry::register
+	 *
+	 * @expectedIncorrectUsage WP_Abilities_Registry::register
+	 */
+	public function test_register_invalid_too_many_slashes_in_name() {
+		$result = $this->registry->register( 'test/v1/extra/add-numbers', self::$test_ability_args );
+		$this->assertNull( $result );
+	}
+
 	/**
 	 * Should reject ability registration without a label.
 	 *
@@ -405,10 +419,23 @@ public function test_register_incorrect_already_registered_ability() {
 	public function test_register_new_ability() {
 		$result = $this->registry->register( self::$test_ability_name, self::$test_ability_args );
 
-		$this->assertEquals(
-			new WP_Ability( self::$test_ability_name, self::$test_ability_args ),
-			$result
-		);
+		$this->assertInstanceOf( WP_Ability::class, $result );
+		$this->assertSame( self::$test_ability_name, $result->get_name() );
+	}
+
+	/**
+	 * Should successfully register a new ability with a versioned name.
+	 *
+	 * @ticket 64098
+	 *
+	 * @covers WP_Abilities_Registry::register
+	 */
+	public function test_register_new_ability_with_versioned_name() {
+		$versioned_name = 'test/v1/add-numbers';
+		$result         = $this->registry->register( $versioned_name, self::$test_ability_args );
+
+		$this->assertInstanceOf( WP_Ability::class, $result );
+		$this->assertSame( $versioned_name, $result->get_name() );
 	}
 
 	/**
@@ -468,7 +495,7 @@ public function test_get_registered_for_known_ability() {
 		$this->registry->register( 'test/three', self::$test_ability_args );
 
 		$result = $this->registry->get_registered( 'test/two' );
-		$this->assertEquals( 'test/two', $result->get_name() );
+		$this->assertSame( 'test/two', $result->get_name() );
 	}
 
 	/**
@@ -499,7 +526,7 @@ public function test_unregister_for_known_ability() {
 		$this->registry->register( 'test/three', self::$test_ability_args );
 
 		$result = $this->registry->unregister( 'test/three' );
-		$this->assertEquals( 'test/three', $result->get_name() );
+		$this->assertSame( 'test/three', $result->get_name() );
 
 		$this->assertFalse( $this->registry->is_registered( 'test/three' ) );
 	}