diff --git a/core/lib/Drupal/Core/Composer/Composer.php b/core/lib/Drupal/Core/Composer/Composer.php
index 5f3a4a92ab..8396bc3539 100644
--- a/core/lib/Drupal/Core/Composer/Composer.php
+++ b/core/lib/Drupal/Core/Composer/Composer.php
@@ -162,7 +162,7 @@ public static function upgradePHPUnit(Event $event) {
 
     // If the PHP version is 7.2 or above and PHPUnit is less than version 6
     // call the drupal-phpunit-upgrade script to upgrade PHPUnit.
-    if (version_compare(PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION, '7.2') >= 0 && version_compare($phpunit_package->getVersion(), '6.1') < 0) {
+    if (version_compare(PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION, '7.0') >= 0 && version_compare($phpunit_package->getVersion(), '6.1') < 0) {
       $event->getComposer()
         ->getEventDispatcher()
         ->dispatchScript('drupal-phpunit-upgrade');