diff --git a/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php b/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php
index 3133f43..1dceb54 100644
--- a/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php
+++ b/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php
@@ -17,7 +17,6 @@ use Drupal\Core\Render\Element;
 use Drupal\paragraphs;
 use Symfony\Component\Validator\ConstraintViolationInterface;
 
-
 /**
  * Plugin implementation of the 'entity_reference paragraphs' widget.
  *
@@ -571,6 +570,21 @@ class InlineParagraphsWidget extends WidgetBase {
         $element['preview']['#access'] = $paragraphs_entity->access('view');
       }
       elseif ($item_mode == 'closed') {
+        $violations = $paragraphs_entity->validate();
+        $violations->filterByFieldAccess();
+        foreach ($violations->getEntityViolations() as $violation) {
+          if (!empty($violation)) {
+            $render_array = [
+              [
+                '#theme' => 'item_list',
+                '#items' => $violation->getMessage(),
+              ],
+            ];
+            $message = \Drupal::service('renderer')->renderPlain($render_array);
+            drupal_set_message($message, 'error');
+          }
+        }
+
         $element['subform'] = array();
       }
       else {
@@ -1046,6 +1060,9 @@ class InlineParagraphsWidget extends WidgetBase {
         $display->extractFormValues($entity, $element['subform'], $form_state);
         $display->validateFormValues($entity, $element['subform'], $form_state);
       }
+//      if ($widget_state['paragraphs'][$delta]['mode'] == 'closed'){
+//         $display->extractFormValues($entity->validate(), $element['subform'], $form_state);
+//      }
     }
 
     static::setWidgetState($element['#field_parents'], $field_name, $form_state, $widget_state);
diff --git a/src/Tests/ParagraphsAccessTest.php b/src/Tests/ParagraphsAccessTest.php
index 3a2a6d2..1be223a 100644
--- a/src/Tests/ParagraphsAccessTest.php
+++ b/src/Tests/ParagraphsAccessTest.php
@@ -7,6 +7,7 @@ use Drupal\field_ui\Tests\FieldUiTestTrait;
 use Drupal\simpletest\WebTestBase;
 use Drupal\user\RoleInterface;
 use Drupal\user\Entity\Role;
+use Drupal\paragraphs\Entity\Paragraph;
 
 /**
  * Tests the access check of paragraphs.
@@ -159,4 +160,109 @@ class ParagraphsAccessTest extends WebTestBase {
     $node = $this->getNodeByTitle('delete_permissions');
     $this->assertUrl('node/' . $node->id());
   }
+
+  /**
+   * Test validation of closed paragraphs.
+   */
+  public function testValidationClosedParagraphs() {
+    // Create a Paragraphs with an entity reference field.
+
+    $admin_user = $this->drupalCreateUser(array(
+      'administer node fields',
+      'administer paragraph form display',
+      'administer node form display',
+      'create paragraphed_content_demo content',
+      'edit any paragraphed_content_demo content',
+    ));
+    $this->drupalLogin($admin_user);
+    // Adding Entity Reference to Paragraph Content Type.
+    $this->drupalPostForm('admin/structure/types/manage/paragraphed_content_demo/fields/add-field', [
+      'new_storage_type' => 'field_ui:entity_reference:node',
+      'label' => 'Content reference test',
+      'field_name' => 'content',
+    ], t('Save and continue'));
+
+    // Create a node.
+    $title = 'empty_node';
+    $this->drupalGet('node/add/paragraphed_content_demo');
+    $this->drupalPostForm(NULL, ['title[0][value]' => $title], t('Save'));
+    $this->assertText('Paragraphed article ' . $title . ' has been created');
+
+    // Create a node and add it as an entity reference.
+    $this->drupalGet('node/add/paragraphed_content_demo');
+    $this->assertText('Content reference test');
+    $paragraph = Paragraph::create([
+      'title' => 'Paragraph2',
+      'type' => 'text',
+      'langcode' => 'en',
+      'field_text_demo' => 'english_text_1',
+      'field_test_reference[0][target_id]' => $title,
+    ]);
+
+    // Change the form-display to closed and delete referenced node.
+    $this->drupalGet('admin/structure/types/manage/paragraphed_content_demo/form-display');
+    $edit = [
+      'fields[field_paragraphs_demo][settings_edit_form][settings][edit_mode]' => 'closed'
+    ];
+    $this->drupalPostAjaxForm(NULL, [], 'field_paragraphs_demo_settings_edit');
+    $this->drupalPostForm(NULL, $edit, t('Update'));
+    $this->drupalPostForm(NULL, [], 'Save');
+    $this->drupalGetNodeByTitle($title)->delete();
+
+    // Check if the setting is stored.
+    $this->drupalGet('node/1/edit');
+
+  }
+
+  /**
+   * Tests required field in collapsed paragraph.
+   */
+  public function testRequiredField() {
+    $admin_user = $this->drupalCreateUser(array(
+      'administer node fields',
+      'administer paragraph form display',
+      'administer node form display',
+      'create paragraphed_content_demo content',
+      'edit any paragraphed_content_demo content',
+    ));
+    $this->drupalLogin($admin_user);
+
+    // Create a paragraph without required field.
+    $title = 'Empty';
+    $this->drupalGet('node/add/paragraphed_content_demo');
+    $this->drupalPostForm(NULL, ['title[0][value]' => $title], t('Save'));
+    $this->assertText('Paragraphed article ' . $title . ' has been created');
+
+    // Create content type that is required.
+    $this->drupalPostForm('admin/structure/types/manage/paragraphed_content_demo/fields/add-field', [
+      'new_storage_type' => 'field_ui:entity_reference:node',
+      'label' => 'Required Content Test',
+      'field_name' => 'content',
+    ], t('Save and continue'));
+    $this->drupalPostForm(NULL, [], t('Save field settings'));
+    $edit = [
+      'required' => TRUE,
+      'settings[handler_settings][target_bundles][paragraphed_content_demo]' => TRUE,
+    ];
+    $this->drupalPostForm(NULL, $edit, 'Save settings');
+    $this->assertText('Saved Required Content Test configuration.');
+
+    // Access previously paragraph after it is created required content.
+    $this->drupalGet('node/1/edit');
+    $this->drupalPostForm(NULL, [], t('Save'));
+    $this->assertText('Required Content Test field is required');
+
+    // Change form display to closed.
+    $this->drupalGet('admin/structure/types/manage/paragraphed_content_demo/form-display');
+    $edit = [
+      'fields[field_paragraphs_demo][settings_edit_form][settings][edit_mode]' => 'closed'
+    ];
+    $this->drupalPostAjaxForm(NULL, [], 'field_paragraphs_demo_settings_edit');
+    $this->drupalPostForm(NULL, $edit, t('Update'));
+    $this->drupalPostForm(NULL, [], 'Save');
+
+    // Saving paragraph must trigger validation.
+    $this->drupalGet('node/1/edit');
+    $this->drupalPostForm(NULL, [], t('Save'));
+  }
 }