diff --git a/src/Filters.php b/src/Filters.php
index 918b2c6..e8ae2d5 100644
--- a/src/Filters.php
+++ b/src/Filters.php
@@ -5,6 +5,12 @@
 namespace Arxy\DoctrineORMFilters;
 
 use Doctrine\ORM\QueryBuilder;
+use InvalidArgumentException;
+
+use function call_user_func_array;
+use function count;
+use function is_array;
+use function is_callable;
 
 trait Filters
 {
@@ -26,7 +32,7 @@ private function getFilter($name): callable
         $this->createFilters();
 
         if (!isset($this->filters[$name])) {
-            throw new \InvalidArgumentException('Filter '.$name.' for '.get_class($this).' does not exists');
+            throw new InvalidArgumentException('Filter ' . $name . ' for ' . get_class($this) . ' does not exists');
         }
 
         return $this->filters[$name];
@@ -81,7 +87,6 @@ public function getSingleResultByFilters(iterable $filterBy): object
         return $this->createQueryBuilderByFilters('entity', $filterBy)->getQuery()->getSingleResult();
     }
 
-
     public function countByFilters(iterable $filterBy): int
     {
         return (int)$this
@@ -90,4 +95,4 @@ public function countByFilters(iterable $filterBy): int
             ->getQuery()
             ->getSingleScalarResult();
     }
-}
\ No newline at end of file
+}
diff --git a/src/HasFilters.php b/src/HasFilters.php
index df04bbf..d2a7548 100644
--- a/src/HasFilters.php
+++ b/src/HasFilters.php
@@ -4,6 +4,8 @@
 
 namespace Arxy\DoctrineORMFilters;
 
+use Doctrine\ORM\NonUniqueResultException;
+use Doctrine\ORM\NoResultException;
 use Doctrine\ORM\QueryBuilder;
 
 interface HasFilters
@@ -17,17 +19,21 @@ public function createQueryBuilderByFilters(
     public function appendFilter(QueryBuilder $queryBuilder, string $alias, string $filterName, ...$values): bool;
 
     /**
-     * @throws \Doctrine\ORM\NonUniqueResultException
+     * @throws NonUniqueResultException
      */
     public function findOneByFilters(iterable $filterBy): ?object;
 
     public function findByFilters(iterable $filterBy): array;
 
     /**
-     * @throws \Doctrine\ORM\NoResultException
-     * @throws \Doctrine\ORM\NonUniqueResultException
+     * @throws NoResultException
+     * @throws NonUniqueResultException
      */
     public function getSingleResultByFilters(iterable $filterBy): object;
 
+    /**
+     * @throws NonUniqueResultException
+     * @throws NoResultException
+     */
     public function countByFilters(iterable $filterBy): int;
-}
\ No newline at end of file
+}
diff --git a/tests/TestRepository.php b/tests/TestRepository.php
index 89b92f7..1c2b0b9 100644
--- a/tests/TestRepository.php
+++ b/tests/TestRepository.php
@@ -4,12 +4,13 @@
 
 use Arxy\DoctrineORMFilters\Filters;
 use Arxy\DoctrineORMFilters\HasFilters;
+use Doctrine\ORM\QueryBuilder;
 
 class TestRepository implements HasFilters
 {
     use Filters;
 
-    public function createQueryBuilder($alias, $indexBy = null)
+    public function createQueryBuilder($alias, $indexBy = null): QueryBuilder
     {
 
     }
@@ -18,4 +19,4 @@ public function getFilters(): array
     {
         return [];
     }
-}
\ No newline at end of file
+}