diff --git a/tests/src/Functional/FieldIntegrationTest.php b/tests/src/Functional/FieldIntegrationTest.php
new file mode 100644
index 0000000..85d691a
--- /dev/null
+++ b/tests/src/Functional/FieldIntegrationTest.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace Drupal\Tests\search_api\Functional;
+
+use Drupal\Core\Serialization\Yaml;
+use Drupal\search_api\Entity\Index;
+
+/**
+ * Class FieldIntegrationTest.
+ *
+ * @group search_api
+ */
+class FieldIntegrationTest extends SearchApiBrowserTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = [
+    'entity_test',
+    'search_api_test_db',
+  ];
+
+  /**
+   * Tests that all fields are added to the index, as expected.
+   */
+  public function testFields() {
+    // Load the index defined in the config
+    $index = Index::load('database_search_index');
+    $fields = $index->getFields();
+
+    // Load that config file directly.
+    $index_configuration = Yaml::decode(file_get_contents( __DIR__ . '/../../search_api_test_db/config/install/search_api.index.database_search_index.yml'));
+    $field_settings = $index_configuration['field_settings'];
+
+    // Check that all the fields defined in the config file made it into the
+    // index.
+    foreach ($field_settings as $setting) {
+      $this->assertArrayHasKey($setting['property_path'], $fields);
+      $field = $fields[$setting['property_path']];
+      $this->assertEquals($setting['label'], $field->getLabel());
+      $this->assertEquals($setting['datasource_id'], $field->getDatasourceId());
+      $this->assertEquals($setting['type'], $field->getType());
+    }
+  }
+
+}