diff -u b/core/modules/node/src/Plugin/Search/NodeSearch.php b/core/modules/node/src/Plugin/Search/NodeSearch.php
--- b/core/modules/node/src/Plugin/Search/NodeSearch.php
+++ b/core/modules/node/src/Plugin/Search/NodeSearch.php
@@ -379,7 +379,7 @@
   /**
    * {@inheritdoc}
    */
-  public function searchIndexClear() {
+  public function indexClear() {
     // All NodeSearch pages share a common search index "type" equal to
     // the plugin ID.
     search_index_clear($this->getPluginId());
diff -u b/core/modules/search/src/Plugin/SearchIndexingInterface.php b/core/modules/search/src/Plugin/SearchIndexingInterface.php
--- b/core/modules/search/src/Plugin/SearchIndexingInterface.php
+++ b/core/modules/search/src/Plugin/SearchIndexingInterface.php
@@ -51,7 +51,7 @@
    *
    * @see search_index_clear()
    */
-  public function searchIndexClear();
+  public function indexClear();
 
   /**
    * Marks the search index for reindexing for this plugin.
only in patch2:
unchanged:
--- a/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
+++ b/core/modules/search/src/Tests/SearchConfigSettingsFormTest.php
@@ -71,7 +71,7 @@ function testSearchSettingsPage() {
     $this->drupalPostForm('admin/config/search/pages', array(), t('Re-index site'));
     $this->assertText(t('Are you sure you want to re-index the site'));
     $this->drupalPostForm('admin/config/search/pages/reindex', array(), t('Re-index site'));
-    $this->assertText(t('The index will be rebuilt'));
+    $this->assertText(t('All search indexes will be rebuilt'));
     $this->drupalGet('admin/config/search/pages');
     $this->assertText(t('There is 1 item left to index.'));