diff --git a/package_manager/src/Validator/MultisiteValidator.php b/package_manager/src/Validator/MultisiteValidator.php
index 8a8ebb4c8be3a606e2dc0844053c9ed1ee4bc690..b739c0a0b0021bb9e679da6b936127f2402a1669 100644
--- a/package_manager/src/Validator/MultisiteValidator.php
+++ b/package_manager/src/Validator/MultisiteValidator.php
@@ -41,7 +41,7 @@ class MultisiteValidator implements PreOperationStageValidatorInterface {
   public function validateStagePreOperation(PreOperationStageEvent $event): void {
     if ($this->isMultisite()) {
       $event->addError([
-        $this->t('Multisites are not supported by Package Manager.'),
+        $this->t('Drupal multisite is not supported by Package Manager.'),
       ]);
     }
   }
diff --git a/package_manager/tests/src/Kernel/MultisiteValidatorTest.php b/package_manager/tests/src/Kernel/MultisiteValidatorTest.php
index 79c7bbf6b0491b5ac98e2b4c6e7e8de8e08ef3be..b83fe43af3334b33b88be50839a6fb5efd01c740 100644
--- a/package_manager/tests/src/Kernel/MultisiteValidatorTest.php
+++ b/package_manager/tests/src/Kernel/MultisiteValidatorTest.php
@@ -24,7 +24,7 @@ class MultisiteValidatorTest extends PackageManagerKernelTestBase {
         TRUE,
         [
           ValidationResult::createError([
-            'Multisites are not supported by Package Manager.',
+            'Drupal multisite is not supported by Package Manager.',
           ]),
         ],
       ],