diff --git a/tests/PHPStan/Analyser/NodeScopeResolverTest.php b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
index 0b01a18923..b34026b08c 100644
--- a/tests/PHPStan/Analyser/NodeScopeResolverTest.php
+++ b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
@@ -731,6 +731,7 @@ public function dataFileAsserts(): iterable
 
 		if (PHP_VERSION_ID >= 80100) {
 			yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-6695.php');
+			yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-6433.php');
 		}
 
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-6698.php');
diff --git a/tests/PHPStan/Analyser/data/bug-6433.php b/tests/PHPStan/Analyser/data/bug-6433.php
new file mode 100644
index 0000000000..9a31de7ef1
--- /dev/null
+++ b/tests/PHPStan/Analyser/data/bug-6433.php
@@ -0,0 +1,21 @@
+<?php // lint >= 8.1
+
+namespace Bug6433;
+
+use Ds\Set;
+use function PHPStan\Testing\assertType;
+
+enum E: string {
+	case A = 'A';
+	case B = 'B';
+}
+
+class Foo
+{
+
+	function x(): void {
+		assertType('Ds\Set<Bug6433\E>', new Set([E::A, E::B]));
+	}
+
+}
+