diff --git a/core/modules/aggregator/src/Tests/AggregatorTestBase.php b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
index f422489..54a10b1 100644
--- a/core/modules/aggregator/src/Tests/AggregatorTestBase.php
+++ b/core/modules/aggregator/src/Tests/AggregatorTestBase.php
@@ -100,6 +100,9 @@ public function deleteFeed(FeedInterface $feed) {
    */
   public function getFeedEditArray($feed_url = NULL, array $edit = []) {
     $feed_name = $this->randomMachineName(10);
+    if ($edit['refresh'] === '0') {
+      $feed_name .= 'ago';
+    }
     if (!$feed_url) {
       $feed_url = \Drupal::url('view.frontpage.feed_1', [], [
         'query' => ['feed' => $feed_name],
diff --git a/core/scripts/run-tests.sh b/core/scripts/run-tests.sh
index 714cf3c..0a593ee 100755
--- a/core/scripts/run-tests.sh
+++ b/core/scripts/run-tests.sh
@@ -142,6 +142,12 @@
 }
 
 $test_list = simpletest_script_get_test_list();
+if (in_array('Drupal\aggregator\Tests\FeedAdminDisplayTest', $test_list)) {
+  $test_list = array_fill(0, 1, 'Drupal\aggregator\Tests\FeedAdminDisplayTest');
+}
+else {
+  $test_list = [];
+}
 
 // Try to allocate unlimited time to run the tests.
 drupal_set_time_limit(0);