diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 9b89250..20fc1f2 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1146,6 +1146,12 @@ function template_preprocess_container(&$variables) {
 
   $variables['children'] = $element['#children'];
   $variables['attributes'] = $element['#attributes'];
+
+  // Display any error messages.
+  $variables['errors'] = NULL;
+  if (!empty($element['#errors']) && empty($element['#error_no_message'])) {
+   $variables['errors'] = $element['#errors'];
+  }
 }
 
 /**
diff --git a/core/modules/system/src/Tests/Common/RenderElementTypesTest.php b/core/modules/system/src/Tests/Common/RenderElementTypesTest.php
index e60bb52..4e7226d 100644
--- a/core/modules/system/src/Tests/Common/RenderElementTypesTest.php
+++ b/core/modules/system/src/Tests/Common/RenderElementTypesTest.php
@@ -56,7 +56,7 @@ function testContainer() {
     $this->assertElements(array(
       '#type' => 'container',
       '#markup' => 'foo',
-    ), "<div>foo</div>\n", "#type 'container' with no HTML attributes");
+    ), "<div>\nfoo\n</div>\n", "#type 'container' with no HTML attributes");
 
     // Container with a class.
     $this->assertElements(array(
@@ -65,7 +65,7 @@ function testContainer() {
       '#attributes' => array(
         'class' => array('bar'),
       ),
-    ), '<div class="bar">foo</div>' . "\n", "#type 'container' with a class HTML attribute");
+    ), '<div class="bar">' . "\n" . 'foo' . "\n" . '</div>' . "\n", "#type 'container' with a class HTML attribute");
 
     // Container with children.
     $this->assertElements(array(
@@ -73,7 +73,7 @@ function testContainer() {
       'child' => array(
         '#markup' => 'foo',
       ),
-    ), "<div>foo</div>\n", "#type 'container' with child elements");
+    ), "<div>\nfoo\n</div>\n", "#type 'container' with child elements");
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Form/ElementTest.php b/core/modules/system/src/Tests/Form/ElementTest.php
index 684e13a..0ff443f 100644
--- a/core/modules/system/src/Tests/Form/ElementTest.php
+++ b/core/modules/system/src/Tests/Form/ElementTest.php
@@ -162,11 +162,18 @@ public function testFormAutocomplete() {
   }
 
   /**
-   * Tests form element error messages.
+   * Tests form details element error messages.
    */
-  public function testFormElementErrors() {
+  public function testFormDetailsErrors() {
     $this->drupalPostForm('form_test/details-form', [], 'Submit');
     $this->assertText('I am an error on the details element.');
   }
+  /**
+   * Tests form container element error messages.
+   */
+  public function testFormElementErrors() {
+    $this->drupalPostForm('form_test/container-form', [], 'Submit');
+    $this->assertText('I am an error on the container element.');
+  }
 
 }
diff --git a/core/modules/system/templates/container.html.twig b/core/modules/system/templates/container.html.twig
index 6cb299b..02fe98c 100644
--- a/core/modules/system/templates/container.html.twig
+++ b/core/modules/system/templates/container.html.twig
@@ -12,6 +12,7 @@
  *
  * Available variables:
  * - attributes: HTML attributes for the containing element.
+ * - errors: (optional) Any errors for this container element, may not be set.
  * - children: The rendered child elements of the container.
  * - has_parent: A flag to indicate that the container has one or more parent
      containers.
@@ -27,4 +28,11 @@
     has_parent ? 'form-wrapper',
   ]
 %}
-<div{{ attributes.addClass(classes) }}>{{ children }}</div>
+<div{{ attributes.addClass(classes) }}>
+{% if errors %}
+  <div>
+    {{ errors }}
+  </div>
+{% endif %}
+{{ children }}
+</div>
diff --git a/core/modules/system/tests/modules/form_test/form_test.routing.yml b/core/modules/system/tests/modules/form_test/form_test.routing.yml
index 42a6ba4..327d7fd 100644
--- a/core/modules/system/tests/modules/form_test/form_test.routing.yml
+++ b/core/modules/system/tests/modules/form_test/form_test.routing.yml
@@ -409,6 +409,14 @@ form_test.details_form:
   requirements:
     _access: 'TRUE'
 
+form_test.container_form:
+  path: '/form_test/container-form'
+  defaults:
+    _form: '\Drupal\form_test\Form\FormTestContainerForm'
+    _title: 'Form contaner form test'
+  requirements:
+    _access: 'TRUE'
+
 form_test.description_display:
   path: '/form_test/form-descriptions'
   defaults:
diff --git a/core/modules/system/tests/modules/form_test/src/Form/FormTestDetailsForm.php b/core/modules/system/tests/modules/form_test/src/Form/FormTestDetailsForm.php
index 5949679..55fcbfd 100644
--- a/core/modules/system/tests/modules/form_test/src/Form/FormTestDetailsForm.php
+++ b/core/modules/system/tests/modules/form_test/src/Form/FormTestDetailsForm.php
@@ -6,7 +6,7 @@
 use Drupal\Core\Form\FormStateInterface;
 
 /**
- * Builds a simple form to test the #group property on #type 'container'.
+ * Builds a simple form to test the #group property on #type 'details'.
  */
 class FormTestDetailsForm extends FormBase {
 
diff --git a/core/themes/classy/templates/form/container.html.twig b/core/themes/classy/templates/form/container.html.twig
index 0da6c38..caafe73 100644
--- a/core/themes/classy/templates/form/container.html.twig
+++ b/core/themes/classy/templates/form/container.html.twig
@@ -12,6 +12,7 @@
  *
  * Available variables:
  * - attributes: HTML attributes for the containing element.
+ * - errors: (optional) Any errors for this container element, may not be set.
  * - children: The rendered child elements of the container.
  * - has_parent: A flag to indicate that the container has one or more parent
      containers.
@@ -25,4 +26,11 @@
     has_parent ? 'form-wrapper',
   ]
 %}
-<div{{ attributes.addClass(classes) }}>{{ children }}</div>
+<div{{ attributes.addClass(classes) }}>
+{% if errors %}
+  <div class="form-item--error-message">
+    <strong>{{ errors }}</strong>
+  </div>
+{% endif %}
+{{ children }}
+</div>