diff -u b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_aggregate_count_int.yml b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_aggregate_count_int.yml
--- b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_aggregate_count_int.yml
+++ b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_aggregate_count_int.yml
@@ -191,7 +191,7 @@
           precision: 0
           decimal: .
           separator: ', '
-          format_plural: 0
+          format_plural: false
           format_plural_string: !!binary MQNAY291bnQ=
           prefix: ''
           suffix: ''
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
@@ -21,12 +21,13 @@
    *
    * @var array
    */
-  public static $testViews = ['test_group_by_in_filters', 'test_aggregate_count', 'test_aggregate_count_int', 'test_group_by_count', 'test_group_by_count_multicardinality', 'test_group_by_field_not_within_bundle'];
+  public static $testViews = ['test_group_by_in_filters', 'test_aggregate_count', 'test_group_by_count', 'test_group_by_count_multicardinality', 'test_group_by_field_not_within_bundle'];
 
   /**
     'test_aggregate_count',
     'test_aggregate_count_function',
     'test_group_by_count',
+    'test_aggregate_count_int',
     'test_group_by_count_multicardinality',
     'test_group_by_field_not_within_bundle',
   ];
@@ -81,25 +82,4 @@
 
   /**
-   * Tests aggregate count feature on an integer field.
-   */
-  public function testAggregateCountInt() {
-    $this->setupTestEntities();
-
-    $view = Views::getView('test_aggregate_count_int');
-    $this->executeView($view);
-
-    $this->assertCount(2, $view->result, 'Make sure the count of items is right.');
-
-    $types = [];
-    foreach ($view->result as $item) {
-      // num_records is an alias for id.
-      $types[$item->entity_test_name] = $item->id;
-    }
-
-    $this->assertEquals(4, $types['name1']);
-    $this->assertEquals(3, $types['name2']);
-  }
-
-  /**
    * Provides a test helper which runs a view with some aggregation function.
    *
@@ -123,4 +103,25 @@
 
   /**
+   * Tests aggregate count feature on an integer field.
+   */
+  public function testAggregateCountInt() {
+    $this->setupTestEntities();
+
+    $view = Views::getView('test_aggregate_count_int');
+    $this->executeView($view);
+
+    $this->assertCount(2, $view->result, 'Make sure the count of items is right.');
+
+    $types = [];
+    foreach ($view->result as $item) {
+      // num_records is an alias for id.
+      $types[$item->entity_test_name] = $item->id;
+    }
+
+    $this->assertEquals(4, $types['name1']);
+    $this->assertEquals(3, $types['name2']);
+  }
+
+  /**
    * Provides a test helper which runs a view with some aggregation function.
    *