diff --git a/tests/Unit/Media/WaveformTest.php b/tests/Unit/Media/WaveformTest.php
index 4151235..dfa9795 100644
--- a/tests/Unit/Media/WaveformTest.php
+++ b/tests/Unit/Media/WaveformTest.php
@@ -52,7 +52,7 @@ class WaveformTest extends AbstractMediaTestCase
             ->method('command')
             ->with($commands);
 
-        $waveform = new Waveform($this->getAudioMock(__FILE__), $driver, $ffprobe, 640, 120, ['#FFFFFF']);
+        $waveform = new Waveform($this->getAudioMock(__FILE__), $driver, $ffprobe, 640, 120, array('#FFFFFF'));
         $this->assertSame($waveform, $waveform->save($pathfile));
     }