diff --git a/tests/phpunit/tests/ajax/Compression.php b/tests/phpunit/tests/ajax/Compression.php
index cd76532023..d8d5235644 100644
--- a/tests/phpunit/tests/ajax/Compression.php
+++ b/tests/phpunit/tests/ajax/Compression.php
@@ -191,7 +191,6 @@ class Tests_Ajax_CompressionTest extends WP_Ajax_UnitTestCase {
 
 		// Save the data stop buffering
 		$data = ob_get_clean();
-		ob_end_clean();
 
 		// Done
 		return $data;