diff --git a/core/modules/system/lib/Drupal/system/Tests/Menu/BreadcrumbTest.php b/core/modules/system/lib/Drupal/system/Tests/Menu/BreadcrumbTest.php
index 92654e8..5c0ab5f 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Menu/BreadcrumbTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Menu/BreadcrumbTest.php
@@ -379,7 +379,7 @@ class BreadcrumbTest extends MenuTestBase {
 
     // Verify breadcrumb on user pages (without menu link) for anonymous user.
     $trail = $home;
-    $this->assertBreadcrumb('user', $trail, t('Login'));
+    $this->assertBreadcrumb('user', $trail, t('Log in'));
     $this->assertBreadcrumb('user/' . $this->admin_user->uid, $trail, $this->admin_user->name);
 
     // Verify breadcrumb on user pages (without menu link) for registered users.
diff --git a/core/modules/user/lib/Drupal/user/Tests/UserAccountLinksTests.php b/core/modules/user/lib/Drupal/user/Tests/UserAccountLinksTests.php
index 2727db6..f6e0b18 100644
--- a/core/modules/user/lib/Drupal/user/Tests/UserAccountLinksTests.php
+++ b/core/modules/user/lib/Drupal/user/Tests/UserAccountLinksTests.php
@@ -102,10 +102,10 @@ class UserAccountLinksTests extends WebTestBase {
     $title_suffix = ' | Drupal';
 
     $this->drupalGet('user');
-    $this->assertTitle('Login' . $title_suffix, "Page title of /user is 'Login'");
+    $this->assertTitle('Log in' . $title_suffix, "Page title of /user is 'Log in'");
 
     $this->drupalGet('user/login');
-    $this->assertTitle('Login' . $title_suffix, "Page title of /user/login is 'Login'");
+    $this->assertTitle('Log in' . $title_suffix, "Page title of /user/login is 'Log in'");
 
     $this->drupalGet('user/register');
     $this->assertTitle('Create new account' . $title_suffix, "Page title of /user/register is 'Create new account' for anonymous users.");
diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index 3d4c51c..7fb6a37 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -1493,7 +1493,7 @@ function user_menu_title() {
     switch (current_path()) {
       case 'user' :
       case 'user/login' :
-        return t('Login');
+        return t('Log in');
       case 'user/register' :
         return t('Create new account');
       case 'user/password' :