7 files declare their use of Context

Enumerator.php in vendor/sebastian/object-enumerator/src/Enumerator.php
ExcludeList.php in vendor/phpunit/phpunit/src/Util/ExcludeList.php
Exporter.php in vendor/phpunit/phpunit/src/Util/Exporter.php
Exporter.php in vendor/sebastian/exporter/src/Exporter.php
ExportUtil.php in vendor/phpspec/prophecy/src/Prophecy/Util/ExportUtil.php
Snapshot.php in vendor/sebastian/global-state/src/Snapshot.php
TestCase.php in vendor/phpunit/phpunit/src/Framework/TestCase.php