MC-41153: Fix broken builds on 2.3.7-develop

Author: dvoskoboinikov

app/code/Magento/Captcha/Test/Unit/Model/Filter/QuoteDataConfigFilterTest.php

@@ -30,7 +30,7 @@ class QuoteDataConfigFilterTest extends TestCase
     /**
      * Initialize Class Dependencies
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->objectManager = new ObjectManager($this);
 

dev/tests/integration/testsuite/Magento/Customer/Model/Metadata/Form/ImageTest.php

@@ -55,7 +55,7 @@ class ImageTest extends \PHPUnit\Framework\TestCase
     /**
      * @inheritDoc
      */
-    public function setUp()
+    public function setUp(): void
     {
         $this->objectManager = Bootstrap::getObjectManager();
         $this->filesystem = $this->objectManager->get(Filesystem::class);

dev/tests/integration/testsuite/Magento/Framework/Error/ProcessorTest.php

@@ -149,7 +149,7 @@ public function testGetViewFileUrl(): void
         $this->processor->_indexDir = __DIR__ . '/version1/magento2';
         $this->processor->_errorDir = __DIR__ . '/version2/magento2';
 
-        $this->assertNotContains('version2/magento2', $this->processor->getViewFileUrl());
-        $this->assertContains('pub/errors/', $this->processor->getViewFileUrl());
+        $this->assertStringNotContainsString('version2/magento2', $this->processor->getViewFileUrl());
+        $this->assertStringContainsString('pub/errors/', $this->processor->getViewFileUrl());
     }
 }