diff -u b/core/modules/migrate_drupal_ui/src/MigrationProviders.php b/core/modules/migrate_drupal_ui/src/MigrationProviders.php
--- b/core/modules/migrate_drupal_ui/src/MigrationProviders.php
+++ b/core/modules/migrate_drupal_ui/src/MigrationProviders.php
@@ -50,2 +50,3 @@
   }
+
 }
diff -u b/core/modules/migrate_drupal_ui/src/Tests/MigrateUpgradeTestBase.php b/core/modules/migrate_drupal_ui/src/Tests/MigrateUpgradeTestBase.php
--- b/core/modules/migrate_drupal_ui/src/Tests/MigrateUpgradeTestBase.php
+++ b/core/modules/migrate_drupal_ui/src/Tests/MigrateUpgradeTestBase.php
@@ -147,7 +147,7 @@
     $this->assertText('Are you sure?');
     // Ensure we get errors about missing providers.
     $this->assertText(t('Source provider not found for provider_no_annotation.'));
-    $this->assertText(t(' Source provider not found for provider_test.'));
+    $this->assertText(t('Source provider not found for provider_test.'));
     $this->assertText(t('Destination provider not found for provider_test'));
 
     // Uninstall the module causing the missing provider error messages.
@@ -166,7 +166,7 @@
     $this->assertText('Are you sure?');
     // Ensure there are no errors about the missing providers.
     $this->assertNoText(t('Source provider not found for provider_no_annotation.'));
-    $this->assertNoText(t(' Source provider not found for provider_test.'));
+    $this->assertNoText(t('Source provider not found for provider_test.'));
     $this->assertNoText(t('Destination provider not found for provider_test'));
     $this->drupalPostForm(NULL, [], t('Perform upgrade'));
     $this->assertText(t('Congratulations, you upgraded Drupal!'));
diff -u b/core/modules/migrate_drupal_ui/tests/src/Kernel/ProvidersExistTest.php b/core/modules/migrate_drupal_ui/tests/src/Kernel/ProvidersExistTest.php
--- b/core/modules/migrate_drupal_ui/tests/src/Kernel/ProvidersExistTest.php
+++ b/core/modules/migrate_drupal_ui/tests/src/Kernel/ProvidersExistTest.php
@@ -29,7 +29,7 @@
     $this->enableModules($modules_to_enable);
 
     /** @var \Drupal\migrate\Plugin\MigrationPluginManager $manager */
-    $pluginManager =  $this->container->get('plugin.manager.migration');
+    $pluginManager = $this->container->get('plugin.manager.migration');
     $migrationProviders  = $this->container->get('migrate_drupal_ui.providers');
     // Get all the migrations
     $migrations = $pluginManager->createInstances(array_keys($pluginManager->getDefinitions()));