diff --git a/core/modules/path/src/Tests/PathAliasTest.php b/core/modules/path/src/Tests/PathAliasTest.php
index 65bdb8e..2b74562 100644
--- a/core/modules/path/src/Tests/PathAliasTest.php
+++ b/core/modules/path/src/Tests/PathAliasTest.php
@@ -142,7 +142,7 @@ function testAdminAlias() {
     // Create absolute path alias.
     $edit = array();
     $edit['source'] = '/node/' . $node3->id();
-    $node3_alias = '/' . $this->randomMachineName(8);
+    $node3_alias = '/' . Unicode::strtolower($this->randomMachineName(8));
     $edit['alias'] = $node3_alias;
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
@@ -186,7 +186,7 @@ function testAdminAlias() {
 
     $edit = array();
     $edit['source'] = 'node/' . $node5->id();
-    $node5_alias = $this->randomMachineName(8);
+    $node5_alias = Unicode::strtolower($this->randomMachineName(8));
     $edit['alias'] = $node5_alias . '/';
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));