diff --git a/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php b/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php
index b9a145b..03a1d63 100644
--- a/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php
+++ b/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php
@@ -51,7 +51,7 @@ function setUp() {
     );
     $this->drupalPost('admin/config/regional/content-language', $edit, t('Save'));
 
-    /*
+    /* @todo un-comment when moved to DrupalUnitTestBase.
     // Enable entity translation for the entity type/bundle.
     translation_entity_set_config('node', 'page', 'enabled', TRUE);
     drupal_static_reset();
diff --git a/core/modules/path/path.install b/core/modules/path/path.install
index 9b70925..eae337d 100644
--- a/core/modules/path/path.install
+++ b/core/modules/path/path.install
@@ -9,24 +9,23 @@
  * Implements hook_field_schema().
  */
 function path_field_schema($field) {
-  $columns = array(
-    'pid' => array(
-      'description' => 'Foreign Key: The path alias ID from {url_alias}.pid.',
-      'type' => 'int',
-      'not null' => FALSE,
-    ),
-    // This partially duplicates {url_alias}.alias, but contains the actual user
-    // input, which should be stored per field, to make it an inherent part of
-    // an entity's life-cycle; e.g., exposing changed values in field revisions.
-    'value' => array(
-      'description' => 'The user-customizable part of the URL alias.',
-      'type' => 'varchar',
-      'length' => 255,
-      'not null' => FALSE,
-    ),
-  );
   return array(
-    'columns' => $columns,
+    'columns' => array(
+      'pid' => array(
+        'description' => 'Foreign Key: The path alias ID from {url_alias}.pid.',
+        'type' => 'int',
+        'not null' => FALSE,
+      ),
+      // This partially duplicates {url_alias}.alias, but contains the actual user
+      // input, which should be stored per field, to make it an inherent part of
+      // an entity's life-cycle; e.g., exposing changed values in field revisions.
+      'value' => array(
+        'description' => 'The user-customizable part of the URL alias.',
+        'type' => 'varchar',
+        'length' => 255,
+        'not null' => FALSE,
+      ),
+    ),
     'foreign keys' => array(
       'path_url_alias' => array(
         'table' => 'url_alias',
diff --git a/core/modules/path/path.module b/core/modules/path/path.module
index 87f10c1..a4f1f53 100644
--- a/core/modules/path/path.module
+++ b/core/modules/path/path.module
@@ -326,3 +326,15 @@ function path_library_info() {
 
   return $libraries;
 }
+
+/**
+ * Implements hook_form_FORM_ID_alter() for field_ui_field_settings_form().
+ */
+function path_form_field_ui_field_settings_form_alter(&$form, $form_state) {
+  if ($form['#field']['type'] == 'path') {
+    // We only support having one path at the entity so it doesn't make sense
+    // to let the site builder choose anything else.
+    $form['field']['container']['cardinality']['#options'] = drupal_map_assoc(array(1));
+    $form['field']['container']['#access'] = FALSE;
+  }
+}