Some Tests do not work after adding policies to model?

I've some database tests

` public function testUpdatePost() { $post = $this->createDummyPost(); $this->assertDatabaseHas('posts', [ "title" => "This is title for test", "content" => "This is content for test", ]);

    $params = [
        'title' => 'x Updated Title here',
        'content' => 'x Updated Content here',
        'user_id' => 1,
    ];

    $this->put("/posts/{$post->id}", $params)->assertStatus(302)->assertSessionHas('status');
    $this->assertEquals(session('status'), 'Post has been updated');

    // Original Post has been gone.
    $this->assertDatabaseMissing('posts', $post->toArray());
}

public function testDeletePost()
{   

    $post = $this->createDummyPost();
    $this->assertDatabaseHas('posts', [ 
        "title" => "This is title for test",
        "content" => "This is content for test",
    ]);

    $this->delete("/posts/{$post->id}")->assertStatus(302)->assertSessionHas('status');
    $this->assertEquals(session('status'), 'Post has been deleted');

    $this->assertSoftDeleted('posts', [ 
        "title" => "This is title for test",
        "content" => "This is content for test",
    ]);
}

private function createDummyPost($user_id = null) :Post
{
    return Post::factory()->newTitle()->create();
}

`

I've added policy on Post Model so no one can delete or update post unless he created the post he want to delete....

After making this policy and worked fine, these two test methods have failed, how can I run the test in this situation?