diff --git a/src/Validator/UpdateVersionValidator.php b/src/Validator/UpdateVersionValidator.php
index b46d34a0dc5dab1af5f4d71f5c874f97fd37cacf..a824ab44fe204197b4a9e6dd8c0b3d194534631b 100644
--- a/src/Validator/UpdateVersionValidator.php
+++ b/src/Validator/UpdateVersionValidator.php
@@ -68,15 +68,19 @@ class UpdateVersionValidator implements EventSubscriberInterface {
       $event->addValidationResult($error);
     }
     elseif ($from_version->getMajorVersion() !== $to_version->getMajorVersion()) {
-      $error = ValidationResult::createError([
-        $this->t('Updating from one major version to another is not supported.'),
+      $messages[] = $this->t('Drupal cannot be automatically updated from its current version, @from_version, to the recommended version, @to_version, because automatic updates from one major version to another are not supported.', [
+        '@to_version' => $to_version_string,
+        '@from_version' => $from_version_string,
       ]);
+      $error = ValidationResult::createError($messages);
       $event->addValidationResult($error);
     }
     elseif ($from_version->getMinorVersion() !== $to_version->getMinorVersion()) {
-      $error = ValidationResult::createError([
-        $this->t('Updating from one minor version to another is not supported.'),
+      $messages[] = $this->t('Drupal cannot be automatically updated from its current version, @from_version, to the recommended version, @to_version, because automatic updates from one minor version to another are not supported.', [
+        '@from_version' => $this->getCoreVersion(),
+        '@to_version' => $event->getPackageVersions()[$core_package_name],
       ]);
+      $error = ValidationResult::createError($messages);
       $event->addValidationResult($error);
     }
 
diff --git a/tests/fixtures/fake-site/.htaccess b/tests/fixtures/fake-site/.htaccess
new file mode 100644
index 0000000000000000000000000000000000000000..14249c50bd7605225950b2d372f352a2dba9252a
--- /dev/null
+++ b/tests/fixtures/fake-site/.htaccess
@@ -0,0 +1 @@
+Deny from all
\ No newline at end of file
diff --git a/tests/fixtures/fake-site/cache/.htaccess b/tests/fixtures/fake-site/cache/.htaccess
new file mode 100644
index 0000000000000000000000000000000000000000..14249c50bd7605225950b2d372f352a2dba9252a
--- /dev/null
+++ b/tests/fixtures/fake-site/cache/.htaccess
@@ -0,0 +1 @@
+Deny from all
\ No newline at end of file
diff --git a/tests/src/Functional/UpdaterFormTest.php b/tests/src/Functional/UpdaterFormTest.php
index 193bc951ba28fe8274e41882decada8f7c83cccb..a5c486492bbba96e411bbd460dd24c3e5a7f9fda 100644
--- a/tests/src/Functional/UpdaterFormTest.php
+++ b/tests/src/Functional/UpdaterFormTest.php
@@ -224,11 +224,12 @@ class UpdaterFormTest extends AutomaticUpdatesFunctionalTestBase {
    */
   public function testMinorVersionUpdateNotSupported(string $update_form_url): void {
     $this->setCoreVersion('9.7.1');
+    $this->checkForUpdates();
 
     $this->drupalGet($update_form_url);
 
     $assert_session = $this->assertSession();
-    $assert_session->pageTextContainsOnce('Updating from one minor version to another is not supported.');
+    $assert_session->pageTextContainsOnce('Drupal cannot be automatically updated from its current version, 9.7.1, to the recommended version, 9.8.1, because automatic updates from one minor version to another are not supported.');
     $assert_session->buttonNotExists('Update');
   }
 
diff --git a/tests/src/Kernel/ReadinessValidation/UpdateVersionValidatorTest.php b/tests/src/Kernel/ReadinessValidation/UpdateVersionValidatorTest.php
index f4a1d06e82467216d7928da3c2f3b6d35409f6af..b98fb2027f22f87fc2a523565ec7d614ed65b3cb 100644
--- a/tests/src/Kernel/ReadinessValidation/UpdateVersionValidatorTest.php
+++ b/tests/src/Kernel/ReadinessValidation/UpdateVersionValidatorTest.php
@@ -32,7 +32,9 @@ class UpdateVersionValidatorTest extends AutomaticUpdatesKernelTestBase {
    */
   public function testMajorUpdates(): void {
     $this->setCoreVersion('8.9.1');
-    $result = ValidationResult::createError(['Updating from one major version to another is not supported.']);
+    $result = ValidationResult::createError([
+      'Drupal cannot be automatically updated from its current version, 8.9.1, to the recommended version, 9.8.1, because automatic updates from one major version to another are not supported.',
+    ]);
     $this->assertCheckerResultsFromManager([$result], TRUE);
 
   }
@@ -42,7 +44,9 @@ class UpdateVersionValidatorTest extends AutomaticUpdatesKernelTestBase {
    */
   public function testMinorUpdates(): void {
     $this->setCoreVersion('9.7.1');
-    $result = ValidationResult::createError(['Updating from one minor version to another is not supported.']);
+    $result = ValidationResult::createError([
+      'Drupal cannot be automatically updated from its current version, 9.7.1, to the recommended version, 9.8.1, because automatic updates from one minor version to another are not supported.',
+    ]);
     $this->assertCheckerResultsFromManager([$result], TRUE);
   }