diff --git a/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php b/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php
index 1183a2b..3cdcb74 100644
--- a/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php
@@ -80,6 +80,9 @@ public function provideTestValidate() {
     $data[] = [new Uri(DataDefinition::create('uri')), 'private://', FALSE];
     $data[] = [new Uri(DataDefinition::create('uri')), 'private://foo.png', TRUE];
     $data[] = [new Uri(DataDefinition::create('uri')), 'drupal.org', FALSE];
+    $data[] = [new Uri(DataDefinition::create('uri')), 'tel:911', TRUE];
+    $data[] = [new Uri(DataDefinition::create('uri')), 'tel:65536', TRUE];
+    $data[] = [new Uri(DataDefinition::create('uri')), 'tel:0123456789', TRUE];
 
     return $data;
   }