phpunit fails - CsvEncoderTest::testDecodeCsv

Problem/Motivation

Drupal 9.0.3
PHP 7.4.9

Running unit tests and this fails:

23) Drupal\Tests\csv_serialization\Unit\CsvEncoderTest::testDecodeCsv with data set #0 ('title,body,images,alias,statu...",,0\n', array(array('This is title 1', 'This is, body 1', 'img1.jpg', '', 1), array('This is title 2', 'This is, body 2', array('img1.jpg', 'img2.jpg'), '', 0), array('This is title 3', 'This is, body 3', array('img1.jpg', 'Image 1', 'img2.jpg', 'Image, 2'), '', 0)))
Failed asserting that two arrays are equal.
--- Expected
+++ Actual
@@ @@
 Array (
     0 => Array (
-        'title' => 'This is title 1'
-        'body' => 'This is, body 1'
-        'images' => 'img1.jpg'
-        'alias' => ''
-        'status' => 1
+        0 => 'title'
+        1 => 'body'
+        2 => 'images'
+        3 => 'alias'
+        4 => 'status'
     )
     1 => Array (
-        'title' => 'This is title 2'
-        'body' => 'This is, body 2'
-        'images' => Array (...)
-        'alias' => ''
-        'status' => 0
+        0 => 'This is title 1'
+        1 => 'This is, body 1'
+        2 => 'img1.jpg'
+        3 => ''
+        4 => '1'
     )
     2 => Array (
-        'title' => 'This is title 3'
-        'body' => 'This is, body 3'
-        'images' => Array (...)
-        'alias' => ''
-        'status' => 0
+        0 => 'This is title 2'
+        1 => 'This is, body 2'
+        2 => Array (...)
+        3 => ''
+        4 => '0'
     )
+    3 => Array (...)
 )

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes