diff --git a/core/modules/responsive_image/tests/src/Functional/ResponsiveImageFieldDisplayTest.php b/core/modules/responsive_image/tests/src/Functional/ResponsiveImageFieldDisplayTest.php
index d0bee328f6..eed27bca26 100644
--- a/core/modules/responsive_image/tests/src/Functional/ResponsiveImageFieldDisplayTest.php
+++ b/core/modules/responsive_image/tests/src/Functional/ResponsiveImageFieldDisplayTest.php
@@ -505,7 +505,7 @@ public function testResponsiveImageFieldFormattersMultipleSources() {
 
     // Assert the picture tag has source tags that include dimensions.
     $this->drupalGet('node/' . $nid);
-    $this->assertSession()->responseMatches('/<picture>\s+<source srcset="' . \preg_quote($large_transform_url, '/') . ' 1x" media="\(min-width: 851px\)" type="image\/png" width="480" height="480"\/>\s+<source srcset="' . \preg_quote($medium_transform_url, '/') . ' 1x, ' . \preg_quote($large_transform_url, '/') . ' 1.5x, ' . \preg_quote($large_transform_url, '/') . ' 2x" type="image\/png" width="220" height="220"\/>\s+<img loading="eager" src="' . \preg_quote($large_transform_url, '/') . '" width="480" height="480" alt="\w+" \/>\s+<\/picture>/');
+    $this->assertSession()->responseMatches('/<picture>\s+<source srcset="' . \preg_quote($large_transform_url, '/') . ' 1x" media="\(min-width: 851px\)" type="image\/png" width="480" height="480"\/>\s+<source srcset="' . \preg_quote($medium_transform_url, '/') . ' 1x, ' . \preg_quote($large_transform_url, '/') . ' 1.5x, ' . \preg_quote($large_transform_url, '/') . ' 2x" type="image\/png" width="480" height="480"\/>\s+<img loading="eager" src="' . \preg_quote($large_transform_url, '/') . '" width="480" height="480" alt="\w+" \/>\s+<\/picture>/');
   }
 
   /**