Index: tests/phpunit/multisite.xml
===================================================================
--- tests/phpunit/multisite.xml	(revision 60712)
+++ tests/phpunit/multisite.xml	(working copy)
@@ -72,4 +72,10 @@
 			</exclude>
 		</whitelist>
 	</filter>
+	<php>
+         <env name="WP_MULTISITE" value="1"/>
+     </php>
+	<logging>
+		<log type="junit" target="junit.xml"/>
+	</logging>
 </phpunit>