diff -u b/core/modules/search/lib/Drupal/search/Tests/SearchLanguageTest.php b/core/modules/search/lib/Drupal/search/Tests/SearchLanguageTest.php
--- b/core/modules/search/lib/Drupal/search/Tests/SearchLanguageTest.php
+++ b/core/modules/search/lib/Drupal/search/Tests/SearchLanguageTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\search\Tests;
 
 use Drupal\Core\Language\Language;
+use Drupal\field\Field;
 
 /**
  * Test node search with multiple languages.
@@ -46,7 +47,7 @@
     // Make the body field translatable. The title is already translatable by
     // definition. The parent class has already created the article and page
     // content types.
-    $field = field_info_field('node', 'body');
+    $field = Field::fieldInfo()->getField('node', 'body');
     $field->translatable = TRUE;
     $field->save();
 
diff -u b/core/modules/search/lib/Drupal/search/Tests/SearchMultilingualEntityTest.php b/core/modules/search/lib/Drupal/search/Tests/SearchMultilingualEntityTest.php
--- b/core/modules/search/lib/Drupal/search/Tests/SearchMultilingualEntityTest.php
+++ b/core/modules/search/lib/Drupal/search/Tests/SearchMultilingualEntityTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\search\Tests;
 
 use Drupal\Core\Language\Language;
+use Drupal\field\Field;
 
 /**
  * Tests entities with multilingual fields.
@@ -50,7 +51,7 @@
     // Make the body field translatable. The title is already translatable by
     // definition. The parent class has already created the article and page
     // content types.
-    $field = field_info_field('node', 'body');
+    $field = Field::fieldInfo()->getField('node', 'body');
     $field->translatable = TRUE;
     $field->save();