diff --git a/core/phpunit.xml.dist b/core/phpunit.xml.dist
index 1952842..b788b65 100644
--- a/core/phpunit.xml.dist
+++ b/core/phpunit.xml.dist
@@ -3,7 +3,6 @@
 <phpunit bootstrap="tests/bootstrap.php" colors="true"
          beStrictAboutTestsThatDoNotTestAnything="true"
          beStrictAboutOutputDuringTests="true"
-         beStrictAboutTestSize="true"
          beStrictAboutChangesToGlobalState="true"
          checkForUnintentionallyCoveredCode="true">
   <php>