diff -u b/project_issue.module b/project_issue.module
--- b/project_issue.module
+++ b/project_issue.module
@@ -2818,7 +2818,7 @@
   // the search string.
   $args = func_get_args();
 
-  // The first argument is $vid. Remove it.
+  // The first argument is $vid, which is not part of the search. Remove it.
   unset($args[0]);
 
   // If the menu system split the search into multiple arguments because '/' was
only in patch2:
unchanged:
--- a/project_issue.info
+++ b/project_issue.info
@@ -39,6 +39,7 @@ files[] = tests/project_issue.test
 files[] = tests/integration/issue_creation.test
 files[] = tests/integration/maintainers.test
 files[] = tests/integration/issue_notifications.test
+files[] = tests/integration/issue_autocomplete.test
 
 files[] = views/plugins/project_issue_table_plugin_style.inc
 files[] = views/plugins/project_issue_plugin_access_per_user_queue.inc
only in patch2:
unchanged:
--- /dev/null
+++ b/tests/integration/issue_autocomplete.test
@@ -0,0 +1,59 @@
+<?php
+
+class ProjectIssueAutocompleteTestCase extends DrupalWebTestCase {
+  protected $admin_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Project issue autocomplete',
+      'description' => 'Test field autocomplete modifications.',
+      'group' => 'Project Issue',
+    );
+  }
+
+  protected function setUp() {
+    parent::setUp(array('project_issue'));
+
+    $perms = array(
+      'administer taxonomy',
+      'administer content types',
+    );
+    $this-> admin_user = $this->drupalCreateUser($perms);
+    $this->drupalLogin($this->admin_user);
+  }
+
+  /**
+   * Test the autocomplete field modifications.
+   */
+  function testProjectIssueAutocomplete() {
+    $vocabulary = new stdClass();
+    $vocabulary->name = 'Autocomplete Test';
+    $vocabulary->machine_name = 'project_issue_taxonomy_vocabulary_issue_queue_2';
+    taxonomy_vocabulary_save($vocabulary);
+    variable_set('project_issue_taxonomy_vocabulary_issue_queue_2', 'autocomplete');
+    $vocabulary = taxonomy_vocabulary_machine_name_load($vocabulary->machine_name);
+    // @todo Create terms that will illustrate the new ordering.
+    $terms = array('aa', 'bb', 'cc');
+    foreach($terms as $term) {
+      $term_object = new stdClass();
+      $term_object->name = $term;
+      $term_object->vid = $vocabulary->vid;
+      taxonomy_term_save($term_object);
+    }
+    $field = array(
+      'field_name' => 'taxonomy_vocabulary_2',
+      'type' => 'taxonomy_term_reference',
+    );
+    field_create_field($field);
+    $this->drupalGet('admin/reports/fields');
+    // @todo Add this field to a content type with an autocomplete widget.
+    // @todo Attach this field to a content type.
+    // @todo Tag some content with this field.
+    // @todo (maybe) clear the menu cache.
+    // @todo Send search terms to taxonomy/autocomplete/taxonomy_vocabulary_2
+    //   and check the order.
+    // @todo Test an invalid URL like
+    //   taxonomy/autocomplete/taxonomy_vocabulary_foo and expect an error.
+
+  }
+}