diff -u b/core/modules/language/src/Config/LanguageConfigOverride.php b/core/modules/language/src/Config/LanguageConfigOverride.php
--- b/core/modules/language/src/Config/LanguageConfigOverride.php
+++ b/core/modules/language/src/Config/LanguageConfigOverride.php
@@ -58,8 +58,9 @@
       foreach ($this->data as $key => $value) {
         $this->validateValue($key, $value);
       }
-      $this->storage->write($this->name, $this->data);
     }
+
+    $this->storage->write($this->name, $this->data);
     // Invalidate the cache tags not only when updating, but also when creating,
     // because a language config override object uses the same cache tag as the
     // default configuration object. Hence creating a language override is like
only in patch2:
unchanged:
--- a/core/modules/config/src/Tests/ConfigInstallTest.php
+++ b/core/modules/config/src/Tests/ConfigInstallTest.php
@@ -45,14 +45,14 @@ function testModuleInstallation() {
 
     // Ensure that schema provided by modules that are not installed is not
     // available.
-    $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.');
+    $this->assertFalse(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'), 'Configuration schema for config_schema_test.someschema 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->assertTrue(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'), 'Configuration schema for config_schema_test.someschema exists.');
 
     // Verify that default module config exists.
     \Drupal::configFactory()->reset($default_config);
@@ -71,14 +71,10 @@ function testModuleInstallation() {
     $this->assertFalse(isset($GLOBALS['hook_config_test']['predelete']));
     $this->assertFalse(isset($GLOBALS['hook_config_test']['delete']));
 
-    // 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);
-
     // Test that uninstalling configuration removes configuration schema.
     $this->config('core.extension')->set('module', array())->save();
     \Drupal::service('config.manager')->uninstall('module', 'config_test');
-    $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.');
+    $this->assertFalse(\Drupal::service('config.typed')->hasConfigSchema('config_schema_test.someschema'), 'Configuration schema for config_schema_test.someschema does not exist.');
   }
 
   /**
only in patch2:
unchanged:
--- a/core/modules/config/tests/config_schema_test/config/install/config_schema_test.schema_in_install.yml
+++ /dev/null
@@ -1 +0,0 @@
-integer: '1'
only in patch2:
unchanged:
--- a/core/modules/config/tests/config_schema_test/config/schema/config_schema_test.schema.yml
+++ b/core/modules/config/tests/config_schema_test/config/schema/config_schema_test.schema.yml
@@ -121,14 +121,6 @@ config_schema_test.schema_data_types:
       sequence:
         - type: boolean
 
-config_schema_test.schema_in_install:
-  label: 'Schema test data with parenting'
-  type: mapping
-  mapping:
-    integer:
-      type: integer
-      label: 'Integer'
-
 config_schema_test_integer:
   type: integer
   label: 'Config test integer'
only in patch2:
unchanged:
--- a/core/modules/config/tests/config_test/config/install/config_test.types.yml
+++ b/core/modules/config/tests/config_test/config/install/config_test.types.yml
@@ -2,7 +2,7 @@ array: []
 boolean: true
 exp: 1.2e+34
 float: 3.14159
-float_as_integer: 1
+float_as_integer: !!float 1
 hex: 0xC
 int: 99
 octal: 0775
only in patch2:
unchanged:
--- a/core/modules/node/config/install/system.action.node_promote_action.yml
+++ b/core/modules/node/config/install/system.action.node_promote_action.yml
@@ -4,3 +4,6 @@ status: true
 langcode: en
 type: node
 plugin: node_promote_action
+dependencies:
+  module:
+    - node
only in patch2:
unchanged:
--- a/core/modules/node/config/install/system.action.node_publish_action.yml
+++ b/core/modules/node/config/install/system.action.node_publish_action.yml
@@ -4,3 +4,6 @@ status: true
 langcode: en
 type: node
 plugin: node_publish_action
+dependencies:
+  module:
+    - node
only in patch2:
unchanged:
--- a/core/modules/options/src/Plugin/Field/FieldType/ListFloatItem.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListFloatItem.php
@@ -109,4 +109,11 @@ public static function simplifyAllowedValues(array $structured_values) {
     return $values;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected static function castAllowedValue($value) {
+    return (float) $value;
+  }
+
 }
only in patch2:
unchanged:
--- a/core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php
@@ -72,4 +72,11 @@ protected static function validateAllowedValue($option) {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected static function castAllowedValue($value) {
+    return (int) $value;
+  }
+
 }
only in patch2:
unchanged:
--- a/core/modules/options/src/Plugin/Field/FieldType/ListItemBase.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListItemBase.php
@@ -314,11 +314,24 @@ protected static function structureAllowedValues(array $values) {
         $label = static::structureAllowedValues($label);
       }
       $structured_values[] = array(
-        'value' => $value,
+        'value' => static::castAllowedValue($value),
         'label' => $label,
       );
     }
     return $structured_values;
   }
 
+  /**
+   * Converts a value to the correct type.
+   *
+   * @param mixed $value
+   *   The value to cast.
+   *
+   * @return mixed
+   *   The casted value.
+   */
+  protected static function castAllowedValue($value) {
+    return $value;
+  }
+
 }
only in patch2:
unchanged:
--- a/core/modules/options/src/Plugin/Field/FieldType/ListStringItem.php
+++ b/core/modules/options/src/Plugin/Field/FieldType/ListStringItem.php
@@ -74,4 +74,11 @@ protected static function validateAllowedValue($option) {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected static function castAllowedValue($value) {
+    return (string) $value;
+  }
+
 }
only in patch2:
unchanged:
--- a/core/modules/options/tests/options_config_install_test/config/install/field.storage.node.field_options_float.yml
+++ b/core/modules/options/tests/options_config_install_test/config/install/field.storage.node.field_options_float.yml
@@ -11,7 +11,7 @@ type: list_float
 settings:
   allowed_values:
     -
-      value: 0
+      value: !!float 0
       label: Zero
     -
       value: 0.5