diff -u b/core/modules/views/tests/src/Kernel/Plugin/StyleGridTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleGridTest.php
--- b/core/modules/views/tests/src/Kernel/Plugin/StyleGridTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleGridTest.php
@@ -69,15 +69,15 @@
     }
     $width = '0';
     switch ($columns) {
-      case 5: $width = '20'; 
+      case 5: $width = '20';
         break;
-      case 4: $width = '25'; 
+      case 4: $width = '25';
         break;
-      case 3: $width = '33.3333'; 
+      case 3: $width = '33.3333';
         break;
-      case 2: $width = '50'; 
+      case 2: $width = '50';
         break;
-      case 1: $width = '100'; 
+      case 1: $width = '100';
         break;
     }
     // Ensure last column exists.