diff --git a/tests/Spout/Writer/ODS/Helper/StyleHelperTest.php b/tests/Spout/Writer/ODS/Helper/StyleHelperTest.php
index 465e6cb..249ce85 100644
--- a/tests/Spout/Writer/ODS/Helper/StyleHelperTest.php
+++ b/tests/Spout/Writer/ODS/Helper/StyleHelperTest.php
@@ -50,8 +50,8 @@ class StyleHelperTest extends \PHPUnit_Framework_TestCase
         $style = (new StyleBuilder())->setFontBold()->build();
 
         $styleHelper = new StyleHelper($this->defaultStyle);
-        $registeredStyles = $styleHelper->registerStyle($style)
-            ->registerStyle($style);
+        $registeredStyles = $styleHelper->registerStyle($style);
+        $registeredStyles = $styleHelper->registerStyle($style);
 
         $this->assertEquals(1, $registeredStyles[0]->getId());
         $this->assertEquals(2, $registeredStyles[1]->getId());
diff --git a/tests/Spout/Writer/XLSX/Helper/StyleHelperTest.php b/tests/Spout/Writer/XLSX/Helper/StyleHelperTest.php
index c6a951a..b608f16 100644
--- a/tests/Spout/Writer/XLSX/Helper/StyleHelperTest.php
+++ b/tests/Spout/Writer/XLSX/Helper/StyleHelperTest.php
@@ -50,8 +50,8 @@ class StyleHelperTest extends \PHPUnit_Framework_TestCase
         $style = (new StyleBuilder())->setFontBold()->build();
 
         $styleHelper = new StyleHelper($this->defaultStyle);
-        $registeredStyles = $styleHelper->registerStyle($style)
-            ->registerStyle($style);
+        $registeredStyles = $styleHelper->registerStyle($style);
+        $registeredStyles = $styleHelper->registerStyle($style);
 
         $this->assertEquals(1, $registeredStyles[0]->getId());
         $this->assertEquals(2, $registeredStyles[1]->getId());