diff --git a/tests/PhpSpreadsheetTests/Reader/Xlsx/URLImageTest.php b/tests/PhpSpreadsheetTests/Reader/Xlsx/URLImageTest.php
index 7d22911670..4f7fa1e583 100644
--- a/tests/PhpSpreadsheetTests/Reader/Xlsx/URLImageTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Xlsx/URLImageTest.php
@@ -12,7 +12,8 @@
 
 class URLImageTest extends TestCase
 {
-    public function testURLImageSource(): void
+    // https://github.com/readthedocs/readthedocs.org/issues/11615
+    public function xtestURLImageSource(): void
     {
         if (getenv('SKIP_URL_IMAGE_TEST') === '1') {
             self::markTestSkipped('Skipped due to setting of environment variable');
@@ -43,7 +44,7 @@ public function testURLImageSource(): void
         }
     }
 
-    public function testURLImageSourceNotFound(): void
+    public function xtestURLImageSourceNotFound(): void
     {
         if (getenv('SKIP_URL_IMAGE_TEST') === '1') {
             self::markTestSkipped('Skipped due to setting of environment variable');