diff --git a/tests/phpunit/expandFnsTest.php b/tests/phpunit/expandFnsTest.php
index 790612dfbe..e036a6d0d8 100644
--- a/tests/phpunit/expandFnsTest.php
+++ b/tests/phpunit/expandFnsTest.php
@@ -379,8 +379,9 @@ public function testHostIsGoneDOI() : void {
     foreach (NULL_DOI_LIST as $doi) {
       if (in_array($doi, NULL_DOI_BUT_GOOD)) {
         $both = $both . "   In Both: " . $doi . "      ";
-      }    
+      }
       $works = doi_works($doi);
+      sleep(1); // give dx.doi.org a break on this junk
       if ($works === TRUE && !in_array($doi, NULL_DOI_ANNOYING)) {
          $changed = TRUE;
       } elseif ($works === FALSE) {