diff -u b/core/modules/views/tests/src/Kernel/QueryGroupByTest.php b/core/modules/views/tests/src/Kernel/QueryGroupByTest.php
--- b/core/modules/views/tests/src/Kernel/QueryGroupByTest.php
+++ b/core/modules/views/tests/src/Kernel/QueryGroupByTest.php
@@ -294,7 +294,7 @@
   }
 
   /**
-   * Tests groupby with a field non-existent field on some bundle.
+   * Tests groupby with a non-existent field on some bundle.
    */
   public function testGroupByWithFieldsNotExistingOnBundle() {
     $field_storage = FieldStorageConfig::create([