diff -u b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
--- b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
+++ b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
@@ -15,13 +15,31 @@
 class DisplayModeUpdateTest extends FieldKernelTestBase {
 
   /**
-   * Makes sure that display modes are updated when a field is created.
+   * Ensure display modes are updated when fields are created or deleted.
    */
   public function testDisplayModeUpdate() {
-    $config_name = 'core.entity_view_display.entity_test.entity_test.foobar';
+    $default_config_name = 'core.entity_view_display.entity_test.entity_test.foobar';
+    $foobar_config_name = 'core.entity_view_display.entity_test.entity_test.foobar';
 
     entity_test_create_bundle('entity_test');
 
+    // Create default display.
+    EntityViewMode::create([
+      'id' => 'entity_test.default',
+      'targetEntityType' => 'entity_test',
+      'status' => TRUE,
+      'enabled' => TRUE,
+    ])->save();
+
+    $display = EntityViewDisplay::create([
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'default',
+      'status' => TRUE,
+    ]);
+    $display->save();
+
+    // Create foobar display.
     EntityViewMode::create([
       'id' => 'entity_test.foobar',
       'targetEntityType' => 'entity_test',
@@ -36,7 +54,10 @@
       'status' => TRUE,
     ]);
     $display->save();
-    $this->assertArrayNotHasKey('field_test', \Drupal::config($config_name)->get('hidden'));
+
+    // Sanity test: field has not been created yet, so should not exist in display.
+    $this->assertArrayNotHasKey('field_test', \Drupal::config($default_config_name)->get('hidden'));
+    $this->assertArrayNotHasKey('field_test', \Drupal::config($foobar_config_name)->get('hidden'));
 
     $field_storage = FieldStorageConfig::create([
       'field_name' => 'field_test',
@@ -51,8 +72,21 @@
       'bundle' => 'entity_test',
     ])->save();
 
-    $display = EntityViewDisplay::load('entity_test.entity_test.foobar');
-    $this->assertArrayHasKey('field_test', \Drupal::config($config_name)->get('hidden'));
+    // Ensure field is added to display modes.
+    $this->assertArrayHasKey('field_test', \Drupal::config($default_config_name)->get('hidden'));
+    $this->assertArrayHasKey('field_test', \Drupal::config($foobar_config_name)->get('hidden'));
+
+    $entityFieldManager = \Drupal::service('entity_field.manager');
+
+    $fields = $entityFieldManager->getFieldDefinitions('entity_test', 'entity_test');
+
+    if (isset($fields['field_test'])) {
+      $fields['field_test']->delete();
+    }
+
+    // Ensure field is removed from display modes.
+    $this->assertArrayNotHasKey('field_test', \Drupal::config($default_config_name)->get('hidden'));
+    $this->assertArrayNotHasKey('field_test', \Drupal::config($foobar_config_name)->get('hidden'));
 
   }