Does code coverage work with a lower explicit memory limit?

.travis.yml

@@ -10,7 +10,7 @@ php:
 
 script:
   - mkdir -p build/logs
-  - phpdbg -dmemory_limit=2g -qrr -- vendor/bin/phpunit -c build
+  - phpdbg -dmemory_limit=768M -qrr -- vendor/bin/phpunit -c build
 
 after_script:
     - CODECLIMATE_REPO_TOKEN=2cbddcebcb9256b3402867282e119dbe61de0b31039325356af3c7d72ed6d058 vendor/bin/test-reporter

Jenkinsfile

@@ -28,7 +28,7 @@ pipeline {
 				sh 'curl -sS https://getcomposer.org/installer | php'
 				sh 'rm -f composer.lock'
 				sh 'php composer.phar install --ignore-platform-reqs'
-				sh 'phpdbg -qrr -- ./vendor/bin/phpunit --coverage-text --coverage-clover clover.xml --colors=never'
+				sh 'phpdbg -dmemory_limit=768M  -qrr -- ./vendor/bin/phpunit --coverage-text --coverage-clover clover.xml --colors=never'
 				step([
 					$class: 'CloverPublisher',
 					cloverReportDir: '',