diff --git a/_tests/tests/unit_tests/sitemap.php b/_tests/tests/unit_tests/sitemap.php
index b8f23deb5f..5fa720e8aa 100644
--- a/_tests/tests/unit_tests/sitemap.php
+++ b/_tests/tests/unit_tests/sitemap.php
@@ -23,6 +23,11 @@ class sitemap_test_set extends cms_test_case
 
     public function setUp()
     {
+        if ($GLOBALS['SITE_DB']->query_select_value('sitemap_cache', 'COUNT(*)') > 3000) {
+            $this->assertTrue(false, 'Test will not work on databases with a huge sitemap');
+            return;
+        }
+
         $this->establish_admin_session();
 
         require_code('sitemap');
@@ -71,6 +76,10 @@ public function flatten_sitemap($sitemap)
 
     public function testIsConclusive()
     {
+        if ($this->sitemap === null) {
+            return;
+        }
+
         // Test we have an arbitrary entry-point, just to ensure things are still generating deeply
         $this->assertTrue(isset($this->flattened['adminzone:admin_config:base']));
 
@@ -80,6 +89,10 @@ public function testIsConclusive()
 
     public function testPageGroupingHelpDocsDefined()
     {
+        if ($this->sitemap === null) {
+            return;
+        }
+
         $applicable_page_groupings = array(
             'audit',
             'security',
@@ -127,6 +140,10 @@ public function testPageGroupingHelpDocsDefined()
 
     public function testHasIcons()
     {
+        if ($this->sitemap === null) {
+            return;
+        }
+
         foreach ($this->flattened as $k => $c) {
             if (preg_match('#^\w*:(\w*(:\w*)?)?$#', $k) != 0) {
                 if (in_array($k, array( // Exceptions
@@ -158,6 +175,10 @@ public function testHasIcons()
 
     public function testNoOrphans()
     {
+        if ($this->sitemap === null) {
+            return;
+        }
+
         foreach ($this->flattened as $c) {
             $this->assertTrue(!isset($c['is_unexpected_orphan']), 'Not tied in via page grouping ' . $c['title']->evaluate());
         }
@@ -165,6 +186,10 @@ public function testNoOrphans()
 
     public function testNoIncompleteNodes()
     {
+        if ($this->sitemap === null) {
+            return;
+        }
+
         $props = array(
             'title',
             'content_type',