diff --git a/tests/Unit/Filters/Frame/CustomFrameFilterTest.php b/tests/Unit/Filters/Frame/CustomFrameFilterTest.php
index 69a6665..98869af 100644
--- a/tests/Unit/Filters/Frame/CustomFrameFilterTest.php
+++ b/tests/Unit/Filters/Frame/CustomFrameFilterTest.php
@@ -9,9 +9,9 @@ class CustomFrameFilterTest extends TestCase
 {
     public function testApplyCustomFrameFilter()
     {
-	$frame = $this->getFrameMock();
+        $frame = $this->getFrameMock();
 
-	$filter = new CustomFrameFilter('whatever i put would end up as a filter');
-	$this->assertEquals(array('-vf', 'whatever i put would end up as a filter'), $filter->apply($frame));
+        $filter = new CustomFrameFilter('whatever i put would end up as a filter');
+        $this->assertEquals(array('-vf', 'whatever i put would end up as a filter'), $filter->apply($frame));
     }
 }