diff --git a/test/classes/plugin/export/PMA_ExportOds_test.php b/test/classes/plugin/export/PMA_ExportOds_test.php
index 57aceb551f..b8d02f2082 100644
--- a/test/classes/plugin/export/PMA_ExportOds_test.php
+++ b/test/classes/plugin/export/PMA_ExportOds_test.php
@@ -192,7 +192,8 @@ class PMA_ExportOds_Test extends PHPUnit_Framework_TestCase
     {
         $GLOBALS['ods_buffer'] = 'header';
 
-        $this->expectOutputRegex('/^PK.*content.xml/');
+        $this->expectOutputRegex('/^504b.*636f6e74656e742e786d6c2f/');
+        $this->setOutputCallback('bin2hex');
 
         $this->assertTrue(
             $this->object->exportFooter()
diff --git a/test/classes/plugin/export/PMA_ExportOdt_test.php b/test/classes/plugin/export/PMA_ExportOdt_test.php
index ef8d89e706..46f589fa15 100644
--- a/test/classes/plugin/export/PMA_ExportOdt_test.php
+++ b/test/classes/plugin/export/PMA_ExportOdt_test.php
@@ -333,7 +333,8 @@ class PMA_ExportOdt_Test extends PHPUnit_Framework_TestCase
     {
         $GLOBALS['odt_buffer'] = 'header';
 
-        $this->expectOutputRegex('/^PK.*content.xml/');
+        $this->expectOutputRegex('/^504b.*636f6e74656e742e786d6c2f/');
+        $this->setOutputCallback('bin2hex');
 
         $this->assertTrue(
             $this->object->exportFooter()