diff -u b/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
--- b/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -279,10 +279,18 @@
 /**
  * Prepares variables for the module uninstall template.
  *
- * @todo
  * @param $variables
  *   An associative array containing:
- *   - form: A render element representing the form.
+ *   - form: A render element representing the form. Child elements of the form
+ *     are individual modules. Each module is an associative array containing
+ *     the following elements:
+ *     - #module_name: The name of the module as a string.
+ *     - name: The name of the module in a renderable array.
+ *     - description: A description of the module.
+ *     - #required_by: (optional) A list of modules that require the module.
+ *     - #validation_reasons: (optional) Additional reasons why the module
+ *       cannot be disabled.
+ *     - #attributes: A list of attributes for the module wrapper.
  *
  * @ingroup themeable
  */
@@ -292,25 +300,25 @@
 
   $variables['empty'] = t('No modules are available to uninstall.');
 
-  // Table headers.
-  $variables['header'] = array(
-    'uninstall' => t('Uninstall'),
-    'name' => t('Name'),
-    'description' => t('Description'),
-  );
-
-  // No theming for the confirm form.
-  if (isset($form['confirm'])) {
-    return drupal_render($form);
-  }
-
   // Iterate through all the modules, which are children of this element.
   foreach (Element::children($form['modules']) as $key) {
     $module = $form['modules'][$key];
-
+    $module['plain_name'] = $module['#module_name'];
     $module['checkbox'] = $form['uninstall'][$key];
     $module['checkbox_id'] = $form['uninstall'][$key]['#id'];
 
+    if (!empty($module['#validation_reasons'])) {
+      $module['validation_reasons'] = $module['#validation_reasons'];
+      $module['reasons_count'] = count($module['validation_reasons']);
+    } else {
+      $module['reasons_count'] = 0;
+    }
+    if (!empty($module['#required_by'])) {
+      $module['required_by'] = $module['#required_by'];
+      $module['reasons_count'] = $module['reasons_count'] + 1;
+    }
+/*
+    krumo($module);
     // Add the modules requiring the module in question as a validation reason.
     if (!empty($module['#required_by'])) {
       $module['#validation_reasons'][] = \Drupal::translation()
@@ -321,12 +329,8 @@
         '#theme' => 'item_list',
         '#items' => $module['#validation_reasons'],
       ];
-      $module['disabled_header'] = \Drupal::translation()->formatPlural(count($module['#validation_reasons']),
-        'The following reason prevents @module from being uninstalled:',
-        'The following reasons prevents @module from being uninstalled:',
-        array('@module' => $module['#module_name']));
-    }
 
+    }*/
     $module['attributes'] = new Attribute($module['#attributes']);
     $variables['modules'][] = $module;
   }
diff -u b/core/modules/system/templates/system-modules-uninstall.html.twig b/core/modules/system/templates/system-modules-uninstall.html.twig
--- b/core/modules/system/templates/system-modules-uninstall.html.twig
+++ b/core/modules/system/templates/system-modules-uninstall.html.twig
@@ -4,23 +4,14 @@
  * Default theme implementation for the modules uninstall page.
  *
  * Available variables:
- * - form:
- *   - filters:
- *   - actions:
- * - header: Table header containing the following cells:
- *   - uninstall: A localized string for the title of the 'uninstall' column.
- *   - name: A localized string for the title of the 'name' column.
- *   - description: A localized string for the title of the 'description'
- *     column.
+ * - form: The modules uninstall form.
  * - modules: Contains multiple module instances. Each module contains:
  *   - attributes: Attributes on the row.
+ *   - plain_name: The plain-text name of the module.
  *   - checkbox: A checkbox for uninstalling the module.
+ *   - checkbox_id: A unique id for interacting with the checkbox element.
  *   - name: The human-readable name of the module.
- *   - id: A unqiue id for interacting with the details element.
- *   - uninstall_id: A unique id for interacting with the checkbox element.
  *   - description: The description of the module.
- *   - machine_name: The module's machine name.
- *   - disabled_header: (optional) A localized string for .
  *   - disabled_reasons: (optional) A list of reasons why this module cannot be
  *     uninstalled.
  *
@@ -36,13 +27,13 @@
   <thead>
     <tr>
       <th>
-        {{ header.uninstall }}
+        {{ 'Uninstall'|t }}
       </th>
       <th>
-        {{ header.name }}
+        {{ 'Name'|t }}
       </th>
       <th>
-        {{ header.description }}
+        {{ 'Description'|t }}
       </th>
     </tr>
   </thead>
@@ -57,8 +48,24 @@
         </td>
         <td class="description">
           <span class="text module-description">{{ module.description }}</span>
-          {% if module.disabled_header is not empty %}
-            <div class="admin-requirements">{{ module.disabled_header }}{{ module.disabled_reasons }}</div>
+          {% if module.reasons_count > 0 %}
+            <div class="admin-requirements">
+              {% trans %}
+                The following reason prevents {{ module.plain_name }} from being uninstalled:
+              {% plural module.reasons_count %}
+                The following reasons prevent {{ module.plain_name }} from being uninstalled:
+              {% endtrans %}
+              <div class="item-list">
+                <ul>
+                  {% for reason in module.validation_reasons %}
+                    <li>{{ reason }}</li>
+                  {% endfor %}
+                  {% if module.required_by %}
+                    <li>{{ 'Required by:'|t }} {{ module.required_by|safe_join(', ') }}</li>
+                  {% endif %}
+                </ul>
+              </div>
+            </div>
           {% endif %}
         </td>
       </tr>
@@ -73,5 +80,5 @@
 {{ form|without(
-    'filters',
-    'modules',
-    'uninstall'
+  'filters',
+  'modules',
+  'uninstall'
 ) }}