diff --git a/core/phpunit.xml.dist b/core/phpunit.xml.dist
index 5d6146726c56..2b45c6429fe0 100644
--- a/core/phpunit.xml.dist
+++ b/core/phpunit.xml.dist
@@ -19,12 +19,12 @@
     <ini name="error_reporting" value="32767"/>
     <!-- Do not limit the amount of memory tests take to run. -->
     <ini name="memory_limit" value="-1"/>
-    <env name="SIMPLETEST_BASE_URL" value=""/>
     <!-- Example SIMPLETEST_BASE_URL value: http://localhost -->
-    <env name="SIMPLETEST_DB" value=""/>
+    <env name="SIMPLETEST_BASE_URL" value=""/>
     <!-- Example SIMPLETEST_DB value: mysql://username:password@localhost/databasename#table_prefix -->
-    <env name="BROWSERTEST_OUTPUT_DIRECTORY" value=""/>
+    <env name="SIMPLETEST_DB" value=""/>
     <!-- Example BROWSERTEST_OUTPUT_DIRECTORY value: /path/to/webroot/sites/simpletest/browser_output -->
+    <env name="BROWSERTEST_OUTPUT_DIRECTORY" value=""/>
   </php>
   <testsuites>
     <testsuite name="unit">