diff --git a/core/lib/Drupal/Core/Config/ConfigInstaller.php b/core/lib/Drupal/Core/Config/ConfigInstaller.php
index 075b656..7bd813d 100644
--- a/core/lib/Drupal/Core/Config/ConfigInstaller.php
+++ b/core/lib/Drupal/Core/Config/ConfigInstaller.php
@@ -412,9 +412,9 @@ public function checkConfigurationToInstall($type, $name) {
     // Install profiles can not have config clashes. Configuration that
     // has the same name as a module's configuration will be used instead.
     if ($name != $this->drupalGetProfile()) {
-      // Validate default configuration of this module. Bail if unable to
-      // install. Should not continue installing more modules because those
-      // may depend on this one.
+      // Throw an exception if the module being installed contains configuration
+      // that already exits. Additionally, can not continue installing more
+      // modules because those may depend on the current module being installed.
       $existing_configuration = $this->findPreExistingConfiguration($type, $name, $enabled_extensions);
       if (!empty($existing_configuration)) {
         throw PreExistingConfigException::create($name, $existing_configuration);
diff --git a/core/lib/Drupal/Core/Config/UnmetDependenciesException.php b/core/lib/Drupal/Core/Config/UnmetDependenciesException.php
index 219ea62..db7ad9c 100644
--- a/core/lib/Drupal/Core/Config/UnmetDependenciesException.php
+++ b/core/lib/Drupal/Core/Config/UnmetDependenciesException.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Config;
 
 use Drupal\Component\Utility\String;
+use Drupal\Core\StringTranslation\TranslationInterface;
 
 /**
  * An exception thrown if configuration has unmet dependencies.
@@ -49,6 +50,26 @@ public function getExtension() {
   }
 
   /**
+   * Gets a translated message from the exception.
+   *
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
+   *   The string translation service.
+   *
+   * @return string
+   */
+  public function getTranslatedMessage(TranslationInterface $string_translation, $extension) {
+    return $string_translation->formatPlural(
+      count($this->getConfigObjects()),
+      'Unable to install @extension, %config_names has unmet dependencies.',
+      'Unable to install @extension, %config_names have unmet dependencies.',
+      [
+        '%config_names' => implode(', ', $this->getConfigObjects()),
+        '@extension' => $extension,
+      ]
+    );
+  }
+
+  /**
    * Creates an exception for an extension and a list of configuration objects.
    *
    * @param $extension
diff --git a/core/modules/config/src/Tests/ConfigInstallTest.php b/core/modules/config/src/Tests/ConfigInstallTest.php
index 2da9e53..4cbc984 100644
--- a/core/modules/config/src/Tests/ConfigInstallTest.php
+++ b/core/modules/config/src/Tests/ConfigInstallTest.php
@@ -48,11 +48,8 @@ function testModuleInstallation() {
     $this->assertFalse(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.schema_in_install'), 'Configuration schema for config_schema_test.schema_in_install does not exist.');
 
     // Install the test module.
-    $this->enableModules(array('config_test', 'config_schema_test'));
-    $this->installConfig(array('config_test', 'config_schema_test'));
-
-    // After module installation the new schema should exist.
-    $this->assertTrue(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.schema_in_install'), 'Configuration schema for config_schema_test.schema_in_install exists.');
+    $this->enableModules(array('config_test'));
+    $this->installConfig(array('config_test'));
 
     // Verify that default module config exists.
     \Drupal::configFactory()->reset($default_config);
@@ -71,6 +68,13 @@ function testModuleInstallation() {
     $this->assertFalse(isset($GLOBALS['hook_config_test']['predelete']));
     $this->assertFalse(isset($GLOBALS['hook_config_test']['delete']));
 
+    // Install the schema test module.
+    $this->enableModules(array('config_schema_test'));
+    $this->installConfig(array('config_schema_test'));
+
+    // After module installation the new schema should exist.
+    $this->assertTrue(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.schema_in_install'), 'Configuration schema for config_schema_test.schema_in_install exists.');
+
     // Ensure that data type casting is applied during config installation.
     $config = $this->config('config_schema_test.schema_in_install');
     $this->assertIdentical($config->get('integer'), 1);
diff --git a/core/modules/system/src/Controller/ThemeController.php b/core/modules/system/src/Controller/ThemeController.php
index 15af689..d82f908 100644
--- a/core/modules/system/src/Controller/ThemeController.php
+++ b/core/modules/system/src/Controller/ThemeController.php
@@ -146,18 +146,7 @@ public function install(Request $request) {
         );
       }
       catch (UnmetDependenciesException $e) {
-        $config_objects = $e->getConfigObjects();
-        drupal_set_message(
-          $this->formatPlural(
-            count($config_objects),
-            'Unable to install @extension, %config_names has unmet dependencies.',
-            'Unable to install @extension, %config_names have unmet dependencies.',
-            array(
-              '%config_names' => implode(', ', $config_objects),
-              '@extension' => $theme,
-            )),
-          'error'
-        );
+        drupal_set_message($e->getTranslatedMessage($this->getStringTranslation(), $theme), 'error');
       }
 
       return $this->redirect('system.themes_page');
diff --git a/core/modules/system/src/Form/ModulesListConfirmForm.php b/core/modules/system/src/Form/ModulesListConfirmForm.php
index 0af7674..5449b41 100644
--- a/core/modules/system/src/Form/ModulesListConfirmForm.php
+++ b/core/modules/system/src/Form/ModulesListConfirmForm.php
@@ -178,16 +178,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         return;
       }
       catch (UnmetDependenciesException $e) {
-        $config_objects = $e->getConfigObjects();
         drupal_set_message(
-          $this->formatPlural(
-            count($config_objects),
-            'Unable to install @extension, %config_names has unmet dependencies.',
-            'Unable to install @extension, %config_names have unmet dependencies.',
-            array(
-              '%config_names' => implode(', ', $config_objects),
-              '@extension' => $this->modules['install'][$e->getExtension()],
-            )),
+          $e->getTranslatedMessage($this->getStringTranslation(), $this->modules['install'][$e->getExtension()]),
           'error'
         );
         return;
diff --git a/core/modules/system/src/Form/ModulesListForm.php b/core/modules/system/src/Form/ModulesListForm.php
index 122f7b2..90a6e9f 100644
--- a/core/modules/system/src/Form/ModulesListForm.php
+++ b/core/modules/system/src/Form/ModulesListForm.php
@@ -538,16 +538,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         return;
       }
       catch (UnmetDependenciesException $e) {
-        $config_objects = $e->getConfigObjects();
         drupal_set_message(
-          $this->formatPlural(
-            count($config_objects),
-            'Unable to install @extension, %config_names has unmet dependencies.',
-            'Unable to install @extension, %config_names have unmet dependencies.',
-            array(
-              '%config_names' => implode(', ', $config_objects),
-              '@extension' => $modules['install'][$e->getExtension()],
-            )),
+          $e->getTranslatedMessage($this->getStringTranslation(), $modules['install'][$e->getExtension()]),
           'error'
         );
         return;