diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 31ddaf9..5b0901f 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -19,6 +19,12 @@
             <directory>tests</directory>
         </testsuite>
 
+        <testsuite name="php84">
+            <directory>tests</directory>
+            <exclude>tests/Internal/NativeAdapter/AdapterCompatibilityTest.php</exclude>
+            <exclude>tests/TyphoonReflectorMemoryTest.php</exclude>
+        </testsuite>
+
         <testsuite name="infection">
             <file>tests/Internal/Inheritance/TypeResolversTest.php</file>
             <file>tests/Internal/PhpDoc/PhpDocTypeReflectorTest.php</file>
diff --git a/src/Internal/NativeAdapter/EnumBackedCaseAdapter.php b/src/Internal/NativeAdapter/EnumBackedCaseAdapter.php
index 348acae..e11dbda 100644
--- a/src/Internal/NativeAdapter/EnumBackedCaseAdapter.php
+++ b/src/Internal/NativeAdapter/EnumBackedCaseAdapter.php
@@ -104,11 +104,10 @@ public function hasType(): bool
 
     /**
      * @psalm-suppress PossiblyUnusedMethod
-     * @TODO
      */
     public function isDeprecated(): bool
     {
-        return false;
+        return $this->constant->isDeprecated();
     }
 
     public function isEnumCase(): bool