diff --git a/src/Option.php b/src/Option.php
index 531642e..0d53632 100644
--- a/src/Option.php
+++ b/src/Option.php
@@ -37,8 +37,6 @@ public function isNone(): bool;
      * @see https://doc.rust-lang.org/std/option/enum.Option.html#method.is_some_and
      *
      * @param Closure(T): bool $predicate
-     * @phpstan-assert-if-true Some<T> $this
-     * @phpstan-assert-if-false None $this
      */
     public function isSomeAnd(Closure $predicate): bool;
 
diff --git a/src/Result.php b/src/Result.php
index e368cd6..000ab5c 100644
--- a/src/Result.php
+++ b/src/Result.php
@@ -37,16 +37,12 @@ public function isErr(): bool;
     /**
      * @see https://doc.rust-lang.org/std/result/enum.Result.html#method.is_ok_and
      * @param Closure(T): bool $predicate
-     * @phpstan-assert-if-true Ok<T> $this
-     * @phpstan-assert-if-false Err<E> $this
      */
     public function isOkAnd(Closure $predicate): bool;
 
     /**
      * @see https://doc.rust-lang.org/std/result/enum.Result.html#method.is_err_and
      * @param Closure(E): bool $predicate
-     * @phpstan-assert-if-true Err<E> $this
-     * @phpstan-assert-if-false Ok<T> $this
      */
     public function isErrAnd(Closure $predicate): bool;