diff --git a/tests/rules.test b/tests/rules.test
index 6fcf65b..80a544c 100644
--- a/tests/rules.test
+++ b/tests/rules.test
@@ -16,7 +16,7 @@ class RulesTestCase extends DrupalWebTestCase {
   }
 
   function setUp() {
-    include_once __DIR__ . '/rules_test.test.inc';
+    include_once dirname(__FILE__) . '/rules_test.test.inc';
 
     parent::setUp('rules', 'rules_test');
     RulesLog::logger()->clear();
@@ -948,7 +948,7 @@ class RulesTestDataCase extends DrupalWebTestCase {
   }
 
   function setUp() {
-    include_once __DIR__ . '/rules_test.test.inc';
+    include_once dirname(__FILE__) . '/rules_test.test.inc';
 
     parent::setUp('rules', 'rules_test');
     variable_set('rules_debug_log', 1);
@@ -1095,7 +1095,7 @@ class RulesTriggerTestCase extends DrupalWebTestCase {
   }
 
   function setUp() {
-    include_once __DIR__ . '/rules_test.test.inc';
+    include_once dirname(__FILE__) . '/rules_test.test.inc';
 
     parent::setUp('rules', 'rules_test');
     RulesLog::logger()->clear();
@@ -1321,7 +1321,7 @@ class RulesIntegrationTestCase extends DrupalWebTestCase {
   }
 
   function setUp() {
-    include_once __DIR__ . '/rules_test.test.inc';
+    include_once dirname(__FILE__) . '/rules_test.test.inc';
 
     parent::setUp('rules', 'rules_test', 'php', 'path');
     RulesLog::logger()->clear();
@@ -2055,7 +2055,7 @@ class RulesEventDispatcherTestCase extends DrupalWebTestCase {
   }
 
   function setUp() {
-    include_once __DIR__ . '/rules_test.test.inc';
+    include_once dirname(__FILE__) . '/rules_test.test.inc';
 
     parent::setUp('rules', 'rules_test');
   }