diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateUrlAliasTest.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateUrlAliasTest.php
index eae71e4..572861d 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateUrlAliasTest.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateUrlAliasTest.php
@@ -61,8 +61,8 @@ public function testUrlAlias() {
     // Test that we can re-import using the UrlAlias destination.
     Database::getConnection('default', 'migrate')
       ->update('url_alias')
-      ->fields(array('dst' => '/new-url-alias'))
-      ->condition('src', '/node/2')
+      ->fields(array('dst' => 'new-url-alias'))
+      ->condition('src', 'node/2')
       ->execute();
 
     db_update($migration->getIdMap()->mapTableName())
diff --git a/core/modules/path/src/Tests/PathLanguageUiTest.php b/core/modules/path/src/Tests/PathLanguageUiTest.php
index ab33c0e..462abb9 100644
--- a/core/modules/path/src/Tests/PathLanguageUiTest.php
+++ b/core/modules/path/src/Tests/PathLanguageUiTest.php
@@ -45,8 +45,8 @@ protected function setUp() {
   function testLanguageNeutralUrl() {
     $name = $this->randomMachineName(8);
     $edit = array();
-    $edit['source'] = 'admin/config/search/path';
-    $edit['alias'] = $name;
+    $edit['source'] = '/admin/config/search/path';
+    $edit['alias'] ='/' . $name;
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
     $this->drupalGet($name);
@@ -59,8 +59,8 @@ function testLanguageNeutralUrl() {
   function testDefaultLanguageUrl() {
     $name = $this->randomMachineName(8);
     $edit = array();
-    $edit['source'] = 'admin/config/search/path';
-    $edit['alias'] = $name;
+    $edit['source'] = '/admin/config/search/path';
+    $edit['alias'] = '/' . $name;
     $edit['langcode'] = 'en';
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
@@ -74,8 +74,8 @@ function testDefaultLanguageUrl() {
   function testNonDefaultUrl() {
     $name = $this->randomMachineName(8);
     $edit = array();
-    $edit['source'] = 'admin/config/search/path';
-    $edit['alias'] = $name;
+    $edit['source'] = '/admin/config/search/path';
+    $edit['alias'] = '/' . $name;
     $edit['langcode'] = 'fr';
     $this->drupalPostForm('admin/config/search/path/add', $edit, t('Save'));
 
diff --git a/core/tests/Drupal/Tests/Core/Path/PathValidatorTest.php b/core/tests/Drupal/Tests/Core/Path/PathValidatorTest.php
index 548f80f..b0acb12 100644
--- a/core/tests/Drupal/Tests/Core/Path/PathValidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Path/PathValidatorTest.php
@@ -179,8 +179,8 @@ public function testIsValidWithPathAlias() {
       ->willReturn([RouteObjectInterface::ROUTE_NAME => 'test_route', '_raw_variables' => new ParameterBag(['key' => 'value'])]);
     $this->pathProcessor->expects($this->once())
       ->method('processInbound')
-      ->with('path-alias', $this->anything())
-      ->willReturn('test-path');
+      ->with('/path-alias', $this->anything())
+      ->willReturn('/test-path');
 
     $this->assertTrue($this->pathValidator->isValid('path-alias'));
   }