diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigFileContentTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigFileContentTest.php
index 2177c34..79d7881 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigFileContentTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigFileContentTest.php
@@ -114,13 +114,13 @@ class ConfigFileContentTest extends WebTestBase {
     $this->assertNull($config->get('i.dont.exist'), 'Non-existent nested value returned NULL.');
 
     // Read false value
-    $this->assertEqual($config->get($false_key), '0', t('Boolean FALSE value returned the string \'0\'.'));
+    $this->assertEqual($config->get($false_key), '0', format_string("Boolean FALSE value returned the string '0'."));
 
     // Read true value
-    $this->assertEqual($config->get($true_key), '1', t('Boolean TRUE value returned the string \'1\'.'));
+    $this->assertEqual($config->get($true_key), '1', format_string("Boolean TRUE value returned the string '1'."));
 
     // Read false that had been nested in an array value
-    $this->assertEqual($config->get($casting_array_false_value_key), '0', t('Nested boolean FALSE value returned the string \'0\'.'));
+    $this->assertEqual($config->get($casting_array_false_value_key), '0', format_string("Nested boolean FALSE value returned the string '0'."));
 
     // Unset a top level value
     $config->clear($key);