diff --git a/.travis.yml b/.travis.yml
index 9e436f5961bc0..a1217e833dd8e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -248,7 +248,7 @@ script:
     - >
       if [ "$TASK" = 'PHPUNIT' ];
       then
-        vendor/bin/phpunit;
+        vendor/bin/phpunit --fail-on-risky --disallow-test-output --verbose;
       fi
 
     - >
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 7d19b0b229a1c..574e3fdc323bb 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -14,6 +14,7 @@
         stopOnIncomplete="false"
         stopOnSkipped="false"
         beStrictAboutTestsThatDoNotTestAnything="false"
+        beStrictAboutOutputDuringTests="true"
         printerClass="Hint_ResultPrinter"
         testSuiteLoaderClass="phpunit_autoloader"
         >