core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php b/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
index f98ba0f1b8..59b0f42350 100644
--- a/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
@@ -280,6 +280,10 @@ public function providerConvenienceConstructors(): \Generator {
       '<a target>',
       ['a' => ['target' => TRUE]],
     ];
+    yield 'tag with single attribute allowing any value unnecessarily explicitly' => [
+      '<a target="*">',
+      ['a' => ['target' => TRUE]],
+    ];
     yield 'tag with single attribute allowing single specific value' => [
       '<a target="_blank">',
       ['a' => ['target' => ['_blank' => TRUE]]],