diff --git a/core/lib/Drupal/Core/Extension/ModuleInstaller.php b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
index 92bdb801ca4a727b23aab05098499f98dbf05c9d..f8300cbabcc77520e1665b47e34846469583af87 100644
--- a/core/lib/Drupal/Core/Extension/ModuleInstaller.php
+++ b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
@@ -344,7 +344,7 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
       foreach ($reasons as $reason) {
         $reason_message[] = implode(', ', $reason);
       }
-      throw new ModuleUninstallValidatorException('The following reasons prevents the modules from being uninstalled: ' . implode('; ', $reason_message));
+      throw new ModuleUninstallValidatorException('The following reasons prevent the modules from being uninstalled: ' . implode('; ', $reason_message));
     }
     // Set the actual module weights.
     $module_list = array_map(function ($module) use ($module_data) {
diff --git a/core/modules/system/src/Tests/Field/FieldModuleUninstallValidatorTest.php b/core/modules/system/src/Tests/Field/FieldModuleUninstallValidatorTest.php
index 37203213ce76b9d5a17fdb1b20a6c77c49892a65..2d7c16071482ee2ae528fd5d3b622e7299a52a14 100644
--- a/core/modules/system/src/Tests/Field/FieldModuleUninstallValidatorTest.php
+++ b/core/modules/system/src/Tests/Field/FieldModuleUninstallValidatorTest.php
@@ -83,7 +83,7 @@ public function testUninstallingModule() {
     }
     catch (ModuleUninstallValidatorException $e) {
       $this->pass($message);
-      $this->assertEqual($e->getMessage(), 'The following reasons prevents the modules from being uninstalled: There is data for the field extra_base_field on entity type Test entity');
+      $this->assertEqual($e->getMessage(), 'The following reasons prevent the modules from being uninstalled: There is data for the field extra_base_field on entity type Test entity');
     }
 
     // Verify uninstalling entity_test is not possible when there is content for