diff --git a/src/Driver/Test/TestTableEntry.php b/src/Driver/Test/TestTableEntry.php
index e43b604..faa0650 100644
--- a/src/Driver/Test/TestTableEntry.php
+++ b/src/Driver/Test/TestTableEntry.php
@@ -3,7 +3,6 @@
 namespace Aternos\Model\Driver\Test;
 
 use Aternos\Model\ModelInterface;
-use Aternos\Model\Query\Field;
 use Aternos\Model\Query\SelectField;
 use Aternos\Model\Query\UpdateField;
 use Aternos\Model\Query\WhereCondition;
diff --git a/src/Query/SelectQuery.php b/src/Query/SelectQuery.php
index 0d266f2..16e649d 100644
--- a/src/Query/SelectQuery.php
+++ b/src/Query/SelectQuery.php
@@ -82,7 +82,7 @@ public function fields(array $fields): static
     public function groupBy(array $fields): static
     {
         $this->group = null;
-        foreach ($fields as $key => $field) {
+        foreach ($fields as $field) {
             if ($field instanceof GroupField) {
                 $this->group[] = $field;
             } else if (is_string($field)) {