diff --git a/src/Type/UnionType.php b/src/Type/UnionType.php
index a1855a713b..b3ddcf1d69 100644
--- a/src/Type/UnionType.php
+++ b/src/Type/UnionType.php
@@ -162,10 +162,14 @@ public function getObjectClassNames(): array
 
 	public function getObjectClassReflections(): array
 	{
-		return $this->pickFromTypes(
-			static fn (Type $type) => $type->getObjectClassReflections(),
-			static fn (Type $type) => $type->isObject()->yes(),
-		);
+		$reflections = [];
+		foreach ($this->types as $type) {
+			foreach ($type->getObjectClassReflections() as $reflection) {
+				$reflections[] = $reflection;
+			}
+		}
+
+		return $reflections;
 	}
 
 	public function getArrays(): array
diff --git a/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionClassRuleTest.php b/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionClassRuleTest.php
index 8a9546216e..78c1b75438 100644
--- a/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionClassRuleTest.php
+++ b/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionClassRuleTest.php
@@ -85,11 +85,6 @@ public function testRule(): void
 				183,
 				'Learn more at https://phpstan.org/user-guide/discovering-symbols',
 			],
-			[
-				'PHPDoc tag @phpstan-require-extends contains unknown class IncompatibleRequireExtends\SomeClass.',
-				183,
-				'Learn more at https://phpstan.org/user-guide/discovering-symbols',
-			],
 		]);
 	}
 
diff --git a/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionTraitRuleTest.php b/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionTraitRuleTest.php
index e345685e67..7d94f1ce79 100644
--- a/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionTraitRuleTest.php
+++ b/tests/PHPStan/Rules/PhpDoc/RequireExtendsDefinitionTraitRuleTest.php
@@ -55,11 +55,6 @@ public function testRule(): void
 				192,
 				'Learn more at https://phpstan.org/user-guide/discovering-symbols',
 			],
-			[
-				'PHPDoc tag @phpstan-require-extends contains unknown class IncompatibleRequireExtends\SomeClass.',
-				192,
-				'Learn more at https://phpstan.org/user-guide/discovering-symbols',
-			],
 		]);
 	}
 
diff --git a/tests/PHPStan/Rules/PhpDoc/SealedDefinitionClassRuleTest.php b/tests/PHPStan/Rules/PhpDoc/SealedDefinitionClassRuleTest.php
index 3ec5da8925..f898643dcb 100644
--- a/tests/PHPStan/Rules/PhpDoc/SealedDefinitionClassRuleTest.php
+++ b/tests/PHPStan/Rules/PhpDoc/SealedDefinitionClassRuleTest.php
@@ -49,6 +49,11 @@ public function testRule(): void
 				26,
 				'Learn more at https://phpstan.org/user-guide/discovering-symbols',
 			],
+			[
+				'PHPDoc tag @phpstan-sealed contains unknown class IncompatibleSealed\UnknownClass.',
+				46,
+				'Learn more at https://phpstan.org/user-guide/discovering-symbols',
+			],
 		]);
 	}
 
diff --git a/tests/PHPStan/Rules/PhpDoc/data/incompatible-sealed.php b/tests/PHPStan/Rules/PhpDoc/data/incompatible-sealed.php
index ab1f47ba28..36b5680d23 100644
--- a/tests/PHPStan/Rules/PhpDoc/data/incompatible-sealed.php
+++ b/tests/PHPStan/Rules/PhpDoc/data/incompatible-sealed.php
@@ -39,3 +39,8 @@ interface ValidInterface {}
  * @phpstan-sealed SomeInterface
  */
 interface ValidInterface2 {}
+
+/**
+ * @phpstan-sealed UnknownClass|SomeClass
+ */
+class InvalidClassWithUnion {}