diff --git a/phpunit.circleci.xml b/phpunit.circleci.xml
index 32dac34..1fac1fc 100644
--- a/phpunit.circleci.xml
+++ b/phpunit.circleci.xml
@@ -1,5 +1,9 @@
 <phpunit
 	bootstrap="Tests/bootstrap.php"
+	convertErrorsToExceptions="true"
+	convertWarningsToExceptions="true"
+	convertNoticesToExceptions="true"
+	convertDeprecationsToExceptions="true"
 	>
 	<testsuites>
 		<testsuite name="VariableAnalysis">
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 07f4fd1..6a3d354 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,6 +1,10 @@
 <phpunit
 	bootstrap="Tests/bootstrap.php"
 	printerClass="LimeDeck\Testing\Printer"
+	convertErrorsToExceptions="true"
+	convertWarningsToExceptions="true"
+	convertNoticesToExceptions="true"
+	convertDeprecationsToExceptions="true"
 	>
 	<testsuites>
 		<testsuite name="VariableAnalysis">