diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0854f36c..fb4b24fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ Changelog
 ### Fixed
 
 - Corrected `isList` type documentation
+- Corrected `isAOf` type documentation
 
 ## 2.1.2
 
diff --git a/src/Assert.php b/src/Assert.php
index 6834e5c4..4c5c8d37 100644
--- a/src/Assert.php
+++ b/src/Assert.php
@@ -472,18 +472,19 @@ public static function isIterable(mixed $value, string $message = ''): iterable
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
+     * @template T of object
      *
-     * @psalm-assert ExpectedType $value
+     * @psalm-assert T $value
      *
-     * @param class-string<ExpectedType> $class
+     * @psalm-param class-string<T> $class
      *
-     * @return ExpectedType
+     * @return T
      *
      * @throws InvalidArgumentException
      */
     public static function isInstanceOf(mixed $value, mixed $class, string $message = ''): object
     {
+        static::object($value);
         static::string($class, 'Expected class as a string. Got: %s');
 
         if (!($value instanceof $class)) {
@@ -498,15 +499,12 @@ public static function isInstanceOf(mixed $value, mixed $class, string $message
     }
 
     /**
-     * @psalm-pure
-     *
-     * @template ExpectedType of object
+     * @template T of object
      *
-     * @psalm-assert !ExpectedType $value
-     *
-     * @param class-string<ExpectedType> $class
+     * @psalm-assert object $value
+     * @psalm-param class-string<T> $class
      *
-     * @return !ExpectedType
+     * @return !T
      *
      * @throws InvalidArgumentException
      */
@@ -527,10 +525,13 @@ public static function notInstanceOf(mixed $value, mixed $class, string $message
     }
 
     /**
-     * @psalm-pure
+     * @template T of object
      *
-     * @param array<object|string> $classes
-     * @psalm-param array<class-string> $classes
+     * @psalm-assert T $value
+     *
+     * @param T $value
+     *
+     * @return T
      *
      * @throws InvalidArgumentException
      */
@@ -540,6 +541,8 @@ public static function isInstanceOfAny(mixed $value, mixed $classes, string $mes
         static::isIterable($classes);
 
         foreach ($classes as $class) {
+            static::string($class, 'Expected class as a string. Got: %s');
+
             if ($value instanceof $class) {
                 return $value;
             }
@@ -555,14 +558,11 @@ public static function isInstanceOfAny(mixed $value, mixed $classes, string $mes
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
+     * @template T of object
      *
-     * @psalm-assert ExpectedType|class-string<ExpectedType> $value
+     * @psalm-assert T|class-string<T> $value
      *
-     * @param ExpectedType|class-string<ExpectedType> $value
-     * @param class-string<ExpectedType> $class
-     *
-     * @return ExpectedType|class-string<ExpectedType>
+     * @return T
      *
      * @throws InvalidArgumentException
      */
@@ -584,12 +584,13 @@ public static function isAOf(mixed $value, mixed $class, string $message = ''):
     /**
      * @psalm-pure
      *
-     * @template UnexpectedType of object
+     * @template T
      *
-     * @param object|string $value
-     * @param class-string<UnexpectedType> $class
+     * @psalm-assert object|class-string $value
      *
-     * @psalm-return !UnexpectedType
+     * @param T $value
+     *
+     * @return T
      *
      * @throws InvalidArgumentException
      */
@@ -620,10 +621,10 @@ public static function isNotA(mixed $value, mixed $class, string $message = ''):
      */
     public static function isAnyOf(mixed $value, mixed $classes, string $message = ''): object|string
     {
+        static::objectish($value);
         static::isIterable($classes);
 
         foreach ($classes as $class) {
-            static::objectish($value);
             static::string($class, 'Expected class as a string. Got: %s');
 
             if (\is_a($value, $class, \is_string($value))) {
diff --git a/src/Mixin.php b/src/Mixin.php
index 31acc8e1..17ce9532 100644
--- a/src/Mixin.php
+++ b/src/Mixin.php
@@ -1143,12 +1143,11 @@ public static function allNullOrIsIterable(mixed $value, string $message = ''):
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
-     * @psalm-assert ExpectedType|null $value
-     *
-     * @param class-string<ExpectedType> $class
+     * @template T of object
+     * @psalm-assert T|null $value
      *
-     * @return ExpectedType|null
+     * @psalm-param class-string<T> $class
+     * @return T|null
      *
      * @throws InvalidArgumentException
      */
@@ -1162,12 +1161,11 @@ public static function nullOrIsInstanceOf(mixed $value, mixed $class, string $me
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
-     * @psalm-assert iterable<ExpectedType> $value
+     * @template T of object
+     * @psalm-assert iterable<T> $value
      *
-     * @param class-string<ExpectedType> $class
-     *
-     * @return iterable<ExpectedType>
+     * @psalm-param class-string<T> $class
+     * @return iterable<T>
      *
      * @throws InvalidArgumentException
      */
@@ -1185,12 +1183,11 @@ public static function allIsInstanceOf(mixed $value, mixed $class, string $messa
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
-     * @psalm-assert iterable<ExpectedType|null> $value
+     * @template T of object
+     * @psalm-assert iterable<T|null> $value
      *
-     * @param class-string<ExpectedType> $class
-     *
-     * @return iterable<ExpectedType|null>
+     * @psalm-param class-string<T> $class
+     * @return iterable<T|null>
      *
      * @throws InvalidArgumentException
      */
@@ -1206,12 +1203,8 @@ public static function allNullOrIsInstanceOf(mixed $value, mixed $class, string
     }
 
     /**
-     * @psalm-pure
-     *
-     * @template ExpectedType of object
-     *
-     * @param class-string<ExpectedType> $class
-     *
+     * @template T of object
+     * @psalm-param class-string<T> $class
      * @return mixed
      *
      * @throws InvalidArgumentException
@@ -1224,12 +1217,8 @@ public static function nullOrNotInstanceOf(mixed $value, mixed $class, string $m
     }
 
     /**
-     * @psalm-pure
-     *
-     * @template ExpectedType of object
-     *
-     * @param class-string<ExpectedType> $class
-     *
+     * @template T of object
+     * @psalm-param class-string<T> $class
      * @return mixed
      *
      * @throws InvalidArgumentException
@@ -1246,14 +1235,11 @@ public static function allNotInstanceOf(mixed $value, mixed $class, string $mess
     }
 
     /**
-     * @psalm-pure
-     *
-     * @template ExpectedType of object
-     * @psalm-assert iterable<!ExpectedType|null> $value
-     *
-     * @param class-string<ExpectedType> $class
+     * @template T of object
+     * @psalm-assert iterable<object|null> $value
      *
-     * @return iterable<!ExpectedType|null>
+     * @psalm-param class-string<T> $class
+     * @return iterable<object|null>
      *
      * @throws InvalidArgumentException
      */
@@ -1269,13 +1255,12 @@ public static function allNullOrNotInstanceOf(mixed $value, mixed $class, string
     }
 
     /**
-     * @psalm-pure
+     * @template T of object
+     * @psalm-assert T|null $value
      *
-     * @param array<object|string> $classes
+     * @param T|null $value
      *
-     * @psalm-param array<class-string> $classes
-     *
-     * @return mixed
+     * @return T|null
      *
      * @throws InvalidArgumentException
      */
@@ -1287,13 +1272,12 @@ public static function nullOrIsInstanceOfAny(mixed $value, mixed $classes, strin
     }
 
     /**
-     * @psalm-pure
+     * @template T of object
+     * @psalm-assert iterable<T> $value
      *
-     * @param array<object|string> $classes
+     * @param iterable<T> $value
      *
-     * @psalm-param array<class-string> $classes
-     *
-     * @return mixed
+     * @return iterable<T>
      *
      * @throws InvalidArgumentException
      */
@@ -1309,13 +1293,12 @@ public static function allIsInstanceOfAny(mixed $value, mixed $classes, string $
     }
 
     /**
-     * @psalm-pure
+     * @template T of object
+     * @psalm-assert iterable<T|null> $value
      *
-     * @param array<object|string> $classes
+     * @param iterable<T|null> $value
      *
-     * @psalm-param array<class-string> $classes
-     *
-     * @return mixed
+     * @return iterable<T|null>
      *
      * @throws InvalidArgumentException
      */
@@ -1333,13 +1316,10 @@ public static function allNullOrIsInstanceOfAny(mixed $value, mixed $classes, st
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
-     * @psalm-assert ExpectedType|class-string<ExpectedType>|null $value
-     *
-     * @param ExpectedType|class-string<ExpectedType>|null $value
-     * @param class-string<ExpectedType>                   $class
+     * @template T of object
+     * @psalm-assert T|class-string<T>|null $value
      *
-     * @return ExpectedType|class-string<ExpectedType>|null
+     * @return T|class-string<T>|null
      *
      * @throws InvalidArgumentException
      */
@@ -1353,13 +1333,10 @@ public static function nullOrIsAOf(mixed $value, mixed $class, string $message =
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
-     * @psalm-assert iterable<ExpectedType|class-string<ExpectedType>> $value
-     *
-     * @param iterable<ExpectedType|class-string<ExpectedType>> $value
-     * @param class-string<ExpectedType>                        $class
+     * @template T of object
+     * @psalm-assert iterable<T|class-string<T>> $value
      *
-     * @return iterable<ExpectedType|class-string<ExpectedType>>
+     * @return iterable<T|class-string<T>>
      *
      * @throws InvalidArgumentException
      */
@@ -1377,13 +1354,10 @@ public static function allIsAOf(mixed $value, mixed $class, string $message = ''
     /**
      * @psalm-pure
      *
-     * @template ExpectedType of object
-     * @psalm-assert iterable<ExpectedType|class-string<ExpectedType>|null> $value
-     *
-     * @param iterable<ExpectedType|class-string<ExpectedType>|null> $value
-     * @param class-string<ExpectedType>                             $class
+     * @template T of object
+     * @psalm-assert iterable<T|class-string<T>|null> $value
      *
-     * @return iterable<ExpectedType|class-string<ExpectedType>|null>
+     * @return iterable<T|class-string<T>|null>
      *
      * @throws InvalidArgumentException
      */
@@ -1401,10 +1375,9 @@ public static function allNullOrIsAOf(mixed $value, mixed $class, string $messag
     /**
      * @psalm-pure
      *
-     * @template UnexpectedType of object
+     * @template T
      *
-     * @param object|string|null           $value
-     * @param class-string<UnexpectedType> $class
+     * @param T|null $value
      *
      * @return mixed
      *
@@ -1420,10 +1393,9 @@ public static function nullOrIsNotA(mixed $value, mixed $class, string $message
     /**
      * @psalm-pure
      *
-     * @template UnexpectedType of object
+     * @template T
      *
-     * @param iterable<object|string>      $value
-     * @param class-string<UnexpectedType> $class
+     * @param iterable<T> $value
      *
      * @return mixed
      *
@@ -1443,12 +1415,12 @@ public static function allIsNotA(mixed $value, mixed $class, string $message = '
     /**
      * @psalm-pure
      *
-     * @template UnexpectedType of object
+     * @template T
+     * @psalm-assert iterable<object|class-string|null> $value
      *
-     * @param iterable<object|string|null> $value
-     * @param class-string<UnexpectedType> $class
+     * @param iterable<T|null> $value
      *
-     * @return mixed
+     * @return iterable<object|class-string|null>
      *
      * @throws InvalidArgumentException
      */
diff --git a/tests/static-analysis/assert-isInstanceOfAny.php b/tests/static-analysis/assert-isInstanceOfAny.php
index f4823462..5274b72e 100644
--- a/tests/static-analysis/assert-isInstanceOfAny.php
+++ b/tests/static-analysis/assert-isInstanceOfAny.php
@@ -7,8 +7,6 @@
 use Webmozart\Assert\Assert;
 
 /**
- * @psalm-pure
- *
  * @param mixed $value
  * @param array<class-string> $classes
  */
@@ -20,8 +18,6 @@ function isInstanceOfAny($value, array $classes): mixed
 }
 
 /**
- * @psalm-pure
- *
  * @param mixed $value
  * @param array<class-string> $classes
  */
@@ -33,8 +29,6 @@ function nullOrIsInstanceOfAny($value, array $classes): mixed
 }
 
 /**
- * @psalm-pure
- *
  * @param mixed $value
  * @param array<class-string> $classes
  */
@@ -46,8 +40,6 @@ function allIsInstanceOfAny($value, array $classes): mixed
 }
 
 /**
- * @psalm-pure
- *
  * @param mixed $value
  * @param array<class-string> $classes
  */
diff --git a/tests/static-analysis/assert-notInstanceOf.php b/tests/static-analysis/assert-notInstanceOf.php
index d91fd921..7f627256 100644
--- a/tests/static-analysis/assert-notInstanceOf.php
+++ b/tests/static-analysis/assert-notInstanceOf.php
@@ -9,8 +9,6 @@
 use Webmozart\Assert\Assert;
 
 /**
- * @psalm-pure
- *
  * @param stdClass|DateTime $value
  */
 function notInstanceOf(mixed $value): DateTime
@@ -21,8 +19,6 @@ function notInstanceOf(mixed $value): DateTime
 }
 
 /**
- * @psalm-pure
- *
  * @psalm-template T of object
  *
  * @param mixed $value
@@ -36,8 +32,6 @@ function nullOrNotInstanceOf($value, $class): mixed
 }
 
 /**
- * @psalm-pure
- *
  * @psalm-template T of object
  *
  * @param mixed $value
@@ -51,8 +45,6 @@ function allNotInstanceOf($value, $class): mixed
 }
 
 /**
- * @psalm-pure
- *
  * @psalm-template T of object
  *
  * @param mixed $value