diff --git a/src/Tests/IntegrationTest.php b/src/Tests/IntegrationTest.php
index a14f24d..b21019a 100644
--- a/src/Tests/IntegrationTest.php
+++ b/src/Tests/IntegrationTest.php
@@ -97,6 +97,54 @@ class IntegrationTest extends WebTestBase {
     $this->deleteServer();
   }
 
+
+  /**
+   * Test what happens when an index has an integer as id/label.
+   *
+   * This needs to be in a seperate index because we also want to see what
+   * happens with the content and we don't want to mess with the content entity
+   * tracking of the other index.
+   */
+  public function testIntegerIndex() {
+    $this->drupalLogin($this->adminUser);
+    $this->getTestServer();
+
+    $this->drupalCreateNode(array('type' => 'article'));
+    $this->drupalCreateNode(array('type' => 'article'));
+
+    $this->drupalGet('admin/config/search/search-api/add-index');
+
+    $this->indexId = 123;
+    $edit = array(
+        'name' => $this->indexId,
+        'id' => $this->indexId,
+        'status' => 1,
+        'description' => 'test Index:: 123~',
+        'server' => 'webtest_server',
+        'datasources[]' => array('entity:node'),
+      );
+    $this->drupalPostForm(NULL, $edit, $this->t('Save'));
+    $this->assertText($this->t('The index was successfully saved.'));
+    $this->assertText($this->t('Successfully tracked @count items for this index.', array('@count' => 2)));
+    $this->assertEqual(2, $this->countTrackedItems());
+
+    $this->enableAllProcessors();
+    $this->checkFieldLabels();
+
+    $this->addFieldsToIndex();
+    $this->removeFieldsFromIndex();
+
+    $this->configureFilter();
+    $this->configureFilterPage();
+    $this->checkProcessorChanges();
+    $this->changeProcessorFieldBoost();
+
+    $this->setReadOnly();
+    $this->disableEnableIndex();
+    $this->changeIndexDatasource();
+    $this->changeIndexServer();
+  }
+
   /**
    * Tests creating a search server via the UI.
    */
diff --git a/src/Tests/Processor/RenderedItemTest.php b/src/Tests/Processor/RenderedItemTest.php
index 8a920e4..4b561fc 100644
--- a/src/Tests/Processor/RenderedItemTest.php
+++ b/src/Tests/Processor/RenderedItemTest.php
@@ -115,6 +115,35 @@ class RenderedItemTest extends ProcessorTestBase {
   }
 
   /**
+   * Tests that the processor is added correctly.
+   */
+  public function testAddProcessor() {
+    $processors = $this->index->getProcessors();
+    $this->assertTrue(
+      array_key_exists('rendered_item', $processors),
+      'Processor successfully added.'
+    );
+
+    $items = array();
+    foreach ($this->nodes as $node) {
+      $items[] = array(
+        'datasource' => 'entity:node',
+        'item' => $node->getTypedData(),
+        'item_id' => $node->id(),
+        'text' => 'node text' . $node->id(),
+      );
+    }
+    $items = $this->generateItems($items);
+
+    foreach ($items as $item) {
+      $this->assertTrue(
+        array_key_exists('rendered_item', $item->getFields()),
+        'Field successfully added.'
+      );
+    }
+  }
+
+  /**
    * Tests whether the rendered_item field is correctly filled by the processor.
    */
   public function testPreprocessIndexItems() {