diff --git a/app/GraphQL/Inventory/Mutations/Variants/Variants.php b/app/GraphQL/Inventory/Mutations/Variants/Variants.php
index 48af2a000..1ae99d676 100644
--- a/app/GraphQL/Inventory/Mutations/Variants/Variants.php
+++ b/app/GraphQL/Inventory/Mutations/Variants/Variants.php
@@ -60,7 +60,7 @@ public function update(mixed $root, array $req): VariantModel
      */
     public function delete(mixed $root, array $req): bool
     {
-        $variant = VariantsRepository::getById($req['id'], auth()->user()->getCurrentCompany());
+        $variant = VariantsRepository::getById((int) $req['id'], auth()->user()->getCurrentCompany());
 
         return $variant->delete();
     }
diff --git a/graphql/schemas/Inventory/variant.graphql b/graphql/schemas/Inventory/variant.graphql
index 577b0ea13..f92af4b92 100644
--- a/graphql/schemas/Inventory/variant.graphql
+++ b/graphql/schemas/Inventory/variant.graphql
@@ -117,12 +117,12 @@ extend type Mutation @guard {
         @field(
             resolver: "App\\GraphQL\\Inventory\\Mutations\\Variants\\Variants@update"
         )
-    deleteVariant(id: Int!): Boolean
+    deleteVariant(id: ID!): Boolean
         @field(
             resolver: "App\\GraphQL\\Inventory\\Mutations\\Variants\\Variants@delete"
         )
     addVariantToWarehouse(
-        id: Int!
+        id: ID!
         warehouse_id: Int!
         input: VariantsWarehousesInput!
     ): Variant
diff --git a/tests/GraphQL/Inventory/ProductsTest.php b/tests/GraphQL/Inventory/ProductsTest.php
index e1996a882..36ff7cbae 100644
--- a/tests/GraphQL/Inventory/ProductsTest.php
+++ b/tests/GraphQL/Inventory/ProductsTest.php
@@ -162,6 +162,55 @@ public function testDeleteProduct(): void
      */
     public function testAddVariantToProduct(): void
     {
+        $region = [
+            'name' => 'Test Region',
+            'slug' => 'test-region',
+            'short_slug' => 'test-region',
+            'is_default' => 1,
+            'currency_id' => 1,
+        ];
+        $regionResponse = $this->graphQL('
+            mutation($data: RegionInput!) {
+                createRegion(input: $data)
+                {
+                    id
+                    name
+                    slug
+                    short_slug
+                    currency_id
+                    is_default
+                }
+            }
+        ', [
+            'data' => $region
+        ])->assertJson([
+            'data' => ['createRegion' => $region]
+        ]);
+        $regionResponse = $regionResponse->decodeResponseJson();
+
+        $warehouseData = [
+            'regions_id' => $regionResponse['data']['createRegion']['id'],
+            'name' => fake()->name,
+            'location' => 'Test Location',
+            'is_default' => false,
+            'is_published' => 1,
+        ];
+
+        $warehouseResponse = $this->graphQL('
+        mutation($data: WarehouseInput!) {
+            createWarehouse(input: $data)
+            {
+                id
+                regions_id
+                name
+                location
+                is_default
+                is_published
+            }
+        }', ['data' => $warehouseData])->assertJson([
+        'data' => ['createWarehouse' => $warehouseData]
+    ]);
+
         $data = [
             'name' => fake()->name,
             'description' => fake()->text,
@@ -196,19 +245,20 @@ public function testAddVariantToProduct(): void
         $data = [
             'name' => fake()->name,
             'description' => fake()->text,
-            'products_id' => $id
+            'products_id' => $id,
+            'warehouse_id' => $warehouseResponse['data']['createWarehouse']['id']
         ];
-        $this->graphQL('
+        $variantResponse = $this->graphQL('
         mutation($data: VariantsInput!) {
             createVariant(input: $data)
             {
+                id
                 name
                 description
                 products_id
             }
-        }', ['data' => $data])->assertJson([
-            'data' => ['createVariant' => $data]
-        ]);
+        }', ['data' => $data]);
+        $this->assertArrayHasKey('id', $variantResponse->json()['data']['createVariant']);
     }
 
     /**
@@ -218,6 +268,55 @@ public function testAddVariantToProduct(): void
      */
     public function testDeleteVariantToProduct(): void
     {
+        $region = [
+            'name' => 'Test Region',
+            'slug' => 'test-region',
+            'short_slug' => 'test-region',
+            'is_default' => 1,
+            'currency_id' => 1,
+        ];
+        $regionResponse = $this->graphQL('
+            mutation($data: RegionInput!) {
+                createRegion(input: $data)
+                {
+                    id
+                    name
+                    slug
+                    short_slug
+                    currency_id
+                    is_default
+                }
+            }
+        ', [
+            'data' => $region
+        ])->assertJson([
+            'data' => ['createRegion' => $region]
+        ]);
+        $regionResponse = $regionResponse->decodeResponseJson();
+
+        $warehouseData = [
+            'regions_id' => $regionResponse['data']['createRegion']['id'],
+            'name' => fake()->name,
+            'location' => 'Test Location',
+            'is_default' => false,
+            'is_published' => 1,
+        ];
+
+        $warehouseResponse = $this->graphQL('
+        mutation($data: WarehouseInput!) {
+            createWarehouse(input: $data)
+            {
+                id
+                regions_id
+                name
+                location
+                is_default
+                is_published
+            }
+        }', ['data' => $warehouseData])->assertJson([
+        'data' => ['createWarehouse' => $warehouseData]
+    ]);
+
         $data = [
             'name' => fake()->name,
             'description' => fake()->text,
@@ -232,6 +331,7 @@ public function testDeleteVariantToProduct(): void
         }', ['data' => $data])->assertJson([
             'data' => ['createProduct' => $data]
         ]);
+
         $response = $this->graphQL('
         query {
             products {
@@ -242,13 +342,19 @@ public function testDeleteVariantToProduct(): void
                 }
             }
         }');
+        $this->assertArrayHasKey('data', $response->json());
+        $this->assertArrayHasKey('products', $response->json()['data']);
+        $this->assertArrayHasKey('data', $response->json()['data']['products']);
+        $this->assertArrayHasKey('id', $response->json()['data']['products']['data'][0]);
+
         $id = $response->json()['data']['products']['data'][0]['id'];
         $data = [
             'name' => fake()->name,
             'description' => fake()->text,
-            'products_id' => $id
+            'products_id' => $id,
+            'warehouse_id' => $warehouseResponse['data']['createWarehouse']['id']
         ];
-        $response = $this->graphQL('
+        $variantResponse = $this->graphQL('
         mutation($data: VariantsInput!) {
             createVariant(input: $data)
             {
@@ -258,11 +364,13 @@ public function testDeleteVariantToProduct(): void
                 products_id
             }
         }', ['data' => $data]);
-        $id = $response->json()['data']['createVariant']['id'];
+        $this->assertArrayHasKey('id', $variantResponse->json()['data']['createVariant']);
+
+        $variantResponseId = $variantResponse->json()['data']['createVariant']['id'];
         $this->graphQL('
-        mutation($id: Int!) {
+        mutation($id: ID!) {
             deleteVariant(id: $id)
-        }', ['id' => $id])->assertJson([
+        }', ['id' => $variantResponseId])->assertJson([
             'data' => ['deleteVariant' => true]
         ]);
     }