diff --git a/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php b/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
index 3027b021aa..9b9582f8ee 100644
--- a/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
+++ b/core/modules/ckeditor5/tests/src/Unit/HTMLRestrictionsTest.php
@@ -605,7 +605,7 @@ public function providerOperands(): \Generator {
       'union' => 'b',
     ];
 
-    // Wildcard + matching tag cases.
+    // Wildcard tag + matching tag cases.
     yield 'wildcard + matching tag: attribute intersection — without possible expansion' => [
       'a' => new HTMLRestrictions(['p' => ['class' => TRUE]]),
       'b' => new HTMLRestrictions(['$block' => ['class' => TRUE]]),
@@ -663,7 +663,7 @@ public function providerOperands(): \Generator {
       'union' => new HTMLRestrictions(['p' => ['class' => ['text-align-center' => TRUE, 'text-align-justify' => TRUE]], '$block' => ['class' => ['text-align-center' => TRUE]]]),
     ];
 
-    // Wildcard + non-matching cases.
+    // Wildcard tag + non-matching tag cases.
     yield 'wildcard + non-matching tag: attribute diff — without possible expansion' => [
       'a' => new HTMLRestrictions(['span' => ['class' => TRUE]]),
       'b' => new HTMLRestrictions(['$block' => ['class' => TRUE]]),
@@ -721,7 +721,7 @@ public function providerOperands(): \Generator {
       'union' => new HTMLRestrictions(['span' => ['class' => ['vertical-align-top' => TRUE, 'vertical-align-bottom' => TRUE]], '$block' => ['class' => ['vertical-align-top' => TRUE]]]),
     ];
 
-    // Wildcard + wildcard cases.
+    // Wildcard tag + wildcard tag cases.
     yield 'wildcard + wildcard tag: attributes' => [
       'a' => new HTMLRestrictions(['$block' => ['class' => TRUE, 'foo' => TRUE]]),
       'b' => new HTMLRestrictions(['$block' => ['class' => TRUE]]),
@@ -750,6 +750,23 @@ public function providerOperands(): \Generator {
       'intersection' => 'a',
       'union' => 'b',
     ];
+
+    // Concrete attributes + Wildcard attribute cases.
+    yield 'concrete attrs + wildcard attr' => [
+      'a' => new HTMLRestrictions(['img' => ['data-entity-uuid' => TRUE, 'data-entity-type' => TRUE]]),
+      'b' => new HTMLRestrictions(['img' => ['data-*' => TRUE]]),
+      'diff' => HTMLRestrictions::emptySet(),
+      'intersection' => 'a',
+      'union' => 'b',
+    ];
+    yield 'concrete attrs + wildcard attr — vice versa' => [
+      'a' => new HTMLRestrictions(['img' => ['data-*' => TRUE]]),
+      'b' => new HTMLRestrictions(['img' => ['data-entity-uuid' => TRUE, 'data-entity-type' => TRUE]]),
+      'diff' => 'a',
+      'intersection' => 'b',
+      'union' => 'a',
+    ];
+
   }
 
 }