Strange assertJSON behaviour - laravel

Question

I want to test, whether an AJAX response contains the array I'm expecting.
So far so good, not really a great deal.
This is how my array should look like:
array (
'data' =>
array (
0 =>
array (
'key1' => 'value1',
'key2' => 'value2,
),
1 =>
array (
'key1' => 'value3',
'key2' => "value4",
),
),
)
When I run my test:
$request->assertJson([the array mentioned above]);
The array really looks like that but it fails anyway. Why?
because in reality it expects the array twice.
In the comparison window, I see that it expects this:
array (
'data' =>
array (
0 =>
array (
'key1' => 'value1',
'key2' => 'value2,
),
1 =>
array (
'key1' => 'value3',
'key2' => "value4",
),
),
0 =>
array (
'key1' => 'value1',
'key2' => 'value2,
),
1 =>
array (
'key1' => 'value3',
'key2' => "value4",
),
)
But got the array mentioned above (which would be what I expect too).
When I run $request->assertJSON([]); the test succeeds but this can't be the way it's supposed to work, is it?

Answer 1

This is not a real answer (in terms of solving the underlying problem), but as I'm supposing this to be a bug, I want to share a workaround with people who encounter this problem too:
It's pretty simple. Just store the json into a variable $array = $request->json() (assuming that the response is saved into the $request variable.
Then test the contained array.
$this->assertEquals(EXPECTED_DATA, ARRAY_TO_TEST).