[NFC] Convert Deprecations in tests to exceptions

phpunit.xml.dist

@@ -4,6 +4,7 @@
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
+         convertDeprecationsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
          stderr="true"