diff --git a/tests/phpunit/block/BlockTest.php b/tests/phpunit/block/BlockTest.php
index 6c93e7488..5dc6f944d 100644
--- a/tests/phpunit/block/BlockTest.php
+++ b/tests/phpunit/block/BlockTest.php
@@ -62,7 +62,7 @@ class BlockTest extends TestCase{
 			}
 		}
 
-		self::assertTrue(false, "Can't test registering new blocks because no unused spaces left");
+		throw new \RuntimeException("Can't test registering new blocks because no unused spaces left");
 	}
 
 	/**