diff --git a/src/Generator.php b/src/Generator.php
index 7579a02..d6327f1 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -84,6 +84,7 @@ public function toExpression(): string
     public function setExpresion(Expression $expression): self
     {
         $this->expression = $expression;
+
         return $this;
     }
 
diff --git a/src/Traits/Years.php b/src/Traits/Years.php
index e057f27..ec95e90 100644
--- a/src/Traits/Years.php
+++ b/src/Traits/Years.php
@@ -4,8 +4,6 @@
 
 namespace Butschster\CronExpression\Traits;
 
-use Cron\CronExpression;
-
 trait Years
 {
     public function months(string | int ...$months): self
diff --git a/tests/GeneratorTest.php b/tests/GeneratorTest.php
index 813eb82..17fbdf2 100644
--- a/tests/GeneratorTest.php
+++ b/tests/GeneratorTest.php
@@ -74,10 +74,10 @@ public function testEveryXHours()
 
     public function testSetsHours()
     {
-        $this->assertExpression('* 1,2,3 * * *', $this->generator->hours(1,2,3));
+        $this->assertExpression('* 1,2,3 * * *', $this->generator->hours(1, 2, 3));
         $this->assertExpression('* */3 * * *', $this->generator->hours('*/3'));
 
-        $this->assertExpression('15 1,2,3 * * *', $this->generator->hourlyAt(15)->hours(1,2,3));
+        $this->assertExpression('15 1,2,3 * * *', $this->generator->hourlyAt(15)->hours(1, 2, 3));
     }
 
     public function testInvalidHoursShouldThrowAnException()