diff --git a/lib/phpunit/classes/util.php b/lib/phpunit/classes/util.php
index 934179b68ce..5c9d9cca89a 100644
--- a/lib/phpunit/classes/util.php
+++ b/lib/phpunit/classes/util.php
@@ -506,6 +506,7 @@ class phpunit_util extends testing_util {
             <testsuite name="@component@_testsuite">
               <directory suffix="_test.php">@dir@</directory>
               <exclude>@dir@/classes</exclude>
+              <exclude>@dir@/fixtures</exclude>
             </testsuite>
 
         EOF;
@@ -597,8 +598,9 @@ class phpunit_util extends testing_util {
         $template = <<<EOT
             <testsuites>
               <testsuite name="@component@_testsuite">
-                <directory suffix="_test.php">.</directory>
-                <exclude>./classes</exclude>
+                <directory suffix="_test.php">tests</directory>
+                <exclude>tests/classes</exclude>
+                <exclude>tests/fixtures</exclude>
               </testsuite>
             </testsuites>
           EOT;
@@ -607,7 +609,7 @@ class phpunit_util extends testing_util {
               <directory suffix=".php">.</directory>
             </include>
             <exclude>
-              <directory suffix="_test.php">.</directory>
+              <directory suffix="_test.php">tests</directory>
             </exclude>
         EOT;