diff --git a/src/Entity/Workspace.php b/src/Entity/Workspace.php
index 3b90272..5e917b8 100644
--- a/src/Entity/Workspace.php
+++ b/src/Entity/Workspace.php
@@ -38,7 +38,6 @@ use Drupal\workspace\UpstreamPluginInterface;
  *       "deploy" = "\Drupal\workspace\Form\WorkspaceDeployForm",
  *     },
  *   },
- *   admin_permission = "administer workspaces",
  *   base_table = "workspace",
  *   revision_table = "workspace_revision",
  *   data_table = "workspace_field_data",
diff --git a/tests/src/Functional/EntityResource/WorkspaceJsonBasicAuthTest.php b/tests/src/Functional/EntityResource/WorkspaceJsonBasicAuthTest.php
index e69de29..b4ccc3f 100644
--- a/tests/src/Functional/EntityResource/WorkspaceJsonBasicAuthTest.php
+++ b/tests/src/Functional/EntityResource/WorkspaceJsonBasicAuthTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\Tests\workspace\Functional\EntityResource;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+
+/**
+ * @group workspace
+ */
+class WorkspaceJsonBasicAuthTest extends WorkspaceResourceTestBase {
+
+  use BasicAuthResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+}
diff --git a/tests/src/Functional/EntityResource/WorkspaceJsonCookieTest.php b/tests/src/Functional/EntityResource/WorkspaceJsonCookieTest.php
index e69de29..0554d87 100644
--- a/tests/src/Functional/EntityResource/WorkspaceJsonCookieTest.php
+++ b/tests/src/Functional/EntityResource/WorkspaceJsonCookieTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\Tests\workspace\Functional\EntityResource;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+
+/**
+ * @group workspace
+ */
+class WorkspaceJsonCookieTest extends WorkspaceResourceTestBase {
+
+  use CookieResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+}
diff --git a/tests/src/Functional/EntityResource/WorkspaceResourceTestBase.php b/tests/src/Functional/EntityResource/WorkspaceResourceTestBase.php
index e9d8fa9..c4ddeb3 100644
--- a/tests/src/Functional/EntityResource/WorkspaceResourceTestBase.php
+++ b/tests/src/Functional/EntityResource/WorkspaceResourceTestBase.php
@@ -4,6 +4,7 @@ namespace Drupal\Tests\workspace\Functional\EntityResource;
 
 use Drupal\Tests\rest\Functional\BcTimestampNormalizerUnixTestTrait;
 use Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase;
+use Drupal\user\Entity\User;
 use Drupal\workspace\Entity\Workspace;
 
 /**
@@ -23,18 +24,23 @@ abstract class WorkspaceResourceTestBase extends EntityResourceTestBase {
    */
   protected static $entityTypeId = 'workspace';
 
+  /**
+   * {@inheritdoc}
+   */
+  protected static $patchProtectedFieldNames = ['changed'];
+
   /**
    * @inheritDoc
    */
   protected function setUpAuthorization($method) {
-    $this->grantPermissionsToTestedRole(['administer workspaces', 'view_workspace_layla']);
+    $this->grantPermissionsToTestedRole(['administer workspaces', 'create workspace', 'update_workspace_layla', 'delete_workspace_layla', 'view_workspace_layla']);
   }
 
   /**
    * @inheritDoc
    */
   protected function createEntity() {
-    $workspace = Workspace::create(['id' => 'layla', 'label' => 'Layla']);
+    $workspace = Workspace::create(['id' => 'layla', 'label' => 'Layla', 'upstream' => 'local_workspace:live']);
     $workspace->save();
     return $workspace;
   }
@@ -43,7 +49,46 @@ abstract class WorkspaceResourceTestBase extends EntityResourceTestBase {
    * @inheritDoc
    */
   protected function getExpectedNormalizedEntity() {
-    throw new \Exception('Not yet supported.');
+    $author = User::load($this->entity->getOwnerId());
+    return [
+      'created' => [
+         $this->formatExpectedTimestampItemValues((int) $this->entity->getStartTime()),
+      ],
+      'changed' => [
+        $this->formatExpectedTimestampItemValues($this->entity->getChangedTime()),
+      ],
+      'id' => [
+        [
+          'value' => 'layla',
+        ],
+      ],
+      'label' => [
+        [
+          'value' => 'Layla',
+        ],
+      ],
+      'revision_id' => [
+        [
+          'value' => 3
+        ],
+      ],
+      'uid' => [
+        [
+          'target_id' => (int) $author->id(),
+          'target_type' => 'user',
+          'target_uuid' => $author->uuid(),
+          'url' => base_path() . 'user/' . $author->id(),
+        ],
+      ],
+      'upstream' => [
+        [
+          'value' => 'local_workspace:live',
+        ],
+      ],
+      'uuid' => [
+        ['value' => $this->entity->uuid()],
+      ],
+    ];
   }
 
   /**
@@ -53,12 +98,17 @@ abstract class WorkspaceResourceTestBase extends EntityResourceTestBase {
     return [
       'id' => [
         [
-          'value' => 'layla',
+          'value' => 'running_on_faith',
         ],
       ],
       'label' => [
         [
-          'value' => 'Layla',
+          'value' => 'Running on faith',
+        ],
+      ],
+      'upstream' => [
+        [
+          'value' => 'local_workspace:stage',
         ],
       ],
     ];
@@ -71,6 +121,14 @@ abstract class WorkspaceResourceTestBase extends EntityResourceTestBase {
     return parent::getExpectedUnauthorizedAccessMessage($method); // TODO: Change the autogenerated stub
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedUnauthorizedAccessCacheability() {
+    return parent::getExpectedUnauthorizedAccessCacheability()->addCacheTags($this->entity->getCacheTags());
+  }
+
+
   /**
    * @inheritDoc
    */
diff --git a/tests/src/Functional/EntityResource/WorkspaceXmlAnonTest.php b/tests/src/Functional/EntityResource/WorkspaceXmlAnonTest.php
index e69de29..966159d 100644
--- a/tests/src/Functional/EntityResource/WorkspaceXmlAnonTest.php
+++ b/tests/src/Functional/EntityResource/WorkspaceXmlAnonTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\Tests\workspace\Functional\EntityResource;
+
+use Drupal\Tests\rest\Functional\AnonResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\XmlEntityNormalizationQuirksTrait;
+
+/**
+ * @group workspace
+ */
+class WorkspaceXmlAnonTest extends WorkspaceResourceTestBase {
+
+  use AnonResourceTestTrait;
+  use XmlEntityNormalizationQuirksTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'xml';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'text/xml; charset=UTF-8';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testPatchPath() {
+    // Deserialization of the XML format is not supported.
+    $this->markTestSkipped();
+  }
+
+}
diff --git a/tests/src/Functional/EntityResource/WorkspaceXmlBasicAuthTest.php b/tests/src/Functional/EntityResource/WorkspaceXmlBasicAuthTest.php
index e69de29..372c496 100644
--- a/tests/src/Functional/EntityResource/WorkspaceXmlBasicAuthTest.php
+++ b/tests/src/Functional/EntityResource/WorkspaceXmlBasicAuthTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace Drupal\Tests\workspace\Functional\EntityResource;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\XmlEntityNormalizationQuirksTrait;
+
+/**
+ * @group workspace
+ */
+class WorkspaceXmlBasicAuthTest extends WorkspaceResourceTestBase {
+
+  use BasicAuthResourceTestTrait;
+  use XmlEntityNormalizationQuirksTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'xml';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'text/xml; charset=UTF-8';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testPatchPath() {
+    // Deserialization of the XML format is not supported.
+    $this->markTestSkipped();
+  }
+
+}
diff --git a/tests/src/Functional/EntityResource/WorkspaceXmlCookieTest.php b/tests/src/Functional/EntityResource/WorkspaceXmlCookieTest.php
index e69de29..d64834a 100644
--- a/tests/src/Functional/EntityResource/WorkspaceXmlCookieTest.php
+++ b/tests/src/Functional/EntityResource/WorkspaceXmlCookieTest.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Drupal\Tests\workspace\Functional\EntityResource;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\XmlEntityNormalizationQuirksTrait;
+
+/**
+ * @group workspace
+ */
+class WorkspaceXmlCookieTest extends WorkspaceResourceTestBase {
+
+  use CookieResourceTestTrait;
+  use XmlEntityNormalizationQuirksTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'xml';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'text/xml; charset=UTF-8';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function testPatchPath() {
+    // Deserialization of the XML format is not supported.
+    $this->markTestSkipped();
+  }
+
+}
diff --git a/workspace.link_relation_types.yml b/workspace.link_relation_types.yml
index e69de29..9791baa 100644
--- a/workspace.link_relation_types.yml
+++ b/workspace.link_relation_types.yml
@@ -0,0 +1,8 @@
+# Workspace extension relation types.
+# See https://tools.ietf.org/html/rfc5988#section-4.2.
+activate-form:
+  uri: https://drupal.org/link-relations/activate-form
+  description: A form where a workspace can be activated.
+deploy-form:
+  uri: https://drupal.org/link-relations/deploy-form
+  description: A form where a workspace can be deployed.
\ No newline at end of file