diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index aaecb8612c..0bb64916ad 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -2,6 +2,7 @@
 	bootstrap="tests/phpunit/includes/bootstrap.php"
         backupGlobals="false"
         colors="true"
+        beStrictAboutTestsThatDoNotTestAnything="true"
         >
     <testsuites>
         <!-- Default test suite to run all tests -->
diff --git a/tests/phpunit/multisite.xml b/tests/phpunit/multisite.xml
index 503cfdafa6..1aac7332d0 100644
--- a/tests/phpunit/multisite.xml
+++ b/tests/phpunit/multisite.xml
@@ -2,6 +2,7 @@
 		bootstrap="includes/bootstrap.php"
         backupGlobals="false"
         colors="true"
+        beStrictAboutTestsThatDoNotTestAnything="true"
         >
     <php>
         <const name="WP_TESTS_MULTISITE" value="1" />