BitBucket pipeline fails on test cases - php

Question

I'm having hard time to configure a BitBucket pipeline to deploy a CakePHP application to a hosting server.
Reading some tutorials I've ended up with this pipeline:
image: edbizarro/bitbucket-pipelines-php7
pipelines:
branches:
master:
- step:
caches:
- composer
script:
- composer install --no-interaction --no-progress --prefer-dist
- composer test
- composer deploy-to-production
but it always fails:
Build setup -> OK
composer install -> OK
composer test -> FAIL
+composer test
phpunit --colors=always
Deprecated Error: Plugin::load() is deprecated. Use Application::addPlugin() instead. This method will be removed in 4.0.0. - /opt/atlassian/pipelines/agent/build/config/bootstrap.php, line: 179
You can disable deprecation warnings by setting Error.errorLevel to E_ALL & ~E_USER_DEPRECATED in your config/app.php. in [/opt/atlassian/pipelines/agent/build/vendor/cakephp/cakephp/src/Core/functions.php, line 311]
PHPUnit 6.5.14 by Sebastian Bergmann and contributors.
Exception: Unable to insert fixtures for "App\Test\TestCase\Controller\CustomersControllerTest" test case. SQLSTATE[HY000] [2002] No such file or directory in [/opt/atlassian/pipelines/agent/build/vendor/cakephp/cakephp/src/TestSuite/Fixture/FixtureManager.php, line 380]
Script phpunit --colors=always handling the test event returned with error code 244
I cannot ls the virtual remote folders but I can mine... so I inspected App\Test\TestCase\Controller\CustomersControllerTest:
<?php
namespace App\Test\TestCase\Controller;
use App\Controller\CustomersController;
use Cake\TestSuite\IntegrationTestTrait;
use Cake\TestSuite\TestCase;
class CustomersControllerTest extends TestCase
{
use IntegrationTestTrait;
public $fixtures = [
'app.Customers',
'app.Orders'
];
public function testIndex()
{
$this->markTestIncomplete('Not implemented yet.');
}
public function testView()
{
$this->markTestIncomplete('Not implemented yet.');
}
public function testAdd()
{
$this->markTestIncomplete('Not implemented yet.');
}
public function testEdit()
{
$this->markTestIncomplete('Not implemented yet.');
}
public function testDelete()
{
$this->markTestIncomplete('Not implemented yet.');
}
}
Because I'm not using tests, can I (safely) avoid the composer test step?
By the way, on the hosting server the PHP version is 5.6 while in the pipeline's image is specified version 7. Might this lead to a problem?