diff --git a/main/testing.py b/main/testing.py
deleted file mode 100644
index c74b95e..0000000
--- a/main/testing.py
+++ /dev/null
@@ -1,130 +0,0 @@
-from dataclasses import dataclass
-from typing import Any, Iterable, Type
-
-import strawberry
-from django.contrib.auth.models import User
-from django.test.client import RequestFactory
-from graphql.pyutils import snake_to_camel
-from strawberry.arguments import is_unset
-from strawberry.types import ExecutionResult
-
-from main.api.schema import schema
-
-
-def lowercase_first_letter(text: str):
-    return text[0].lower() + text[1:]
-
-
-def is_valid_field_values(values: Iterable) -> bool:
-    return isinstance(values, list) and all(isinstance(value, str) or isinstance(value, dict) for value in values)
-
-
-@dataclass
-class MutationTest:
-    """Helper class to test graphql mutations"""
-
-    mutation: Type[strawberry.mutation]
-    fields: Iterable[str]
-    user: User = None
-    _schema: strawberry.Schema = schema  # FIXME: take as arg
-
-    def __str__(self) -> str:
-        return f"MutationTest ({self.name})"
-
-    @property
-    def name(self) -> str:
-        return snake_to_camel(self.mutation.name)
-
-    @property
-    def arguments(self) -> Iterable[dict[str, Any]]:
-        return [
-            {
-                "name": lowercase_first_letter(snake_to_camel(arg.python_name)),
-                "type": self._schema.schema_converter.from_argument(arg).type,
-                "is_required": is_unset(arg),
-            }
-            for arg in self.mutation.arguments
-        ]
-
-    @property
-    def required_arguments(self) -> Iterable[dict[str, Any]]:
-        return [arg for arg in self.arguments if arg["is_required"]]
-
-    @property
-    def optional_arguments(self) -> Iterable[dict[str, Any]]:
-        return [arg for arg in self.arguments if not arg["is_required"]]
-
-    @property
-    def mutation_args(self) -> tuple[Iterable[str], Iterable[str]]:
-        _definitions = []
-        _inputs = []
-
-        for arg in self.arguments:
-            name = arg["name"]
-
-            _definitions.append(f"${name}: {arg['type']}")
-            _inputs.append(f"{name}: ${name}")
-
-        return _definitions, _inputs
-
-    @classmethod
-    def expand_field(cls, field):
-        if isinstance(field, str):
-            return field
-        if isinstance(field, dict):
-            field_string = ""
-            for key, values in field.items():
-                if not is_valid_field_values(values):
-                    raise ValueError("Wrong format in MutationTest retrieval fields")
-
-                values_string = ", ".join(cls.expand_field(value) for value in values)
-                field_string = f"""
-                    {field_string}
-                    {key} {{
-                        {values_string}
-                    }}
-                """
-            return field_string
-
-        raise ValueError("MutationTest: Fields can only be strings or dicts")
-
-    @property
-    def serialize(self) -> str:
-        _definitions, _inputs = self.mutation_args
-        definitions = ", ".join(_definitions)
-        inputs = ", ".join(_inputs)
-        operation_name = lowercase_first_letter(self.name)
-        if not isinstance(self.fields, str):
-            expanded_fields = [self.expand_field(field) for field in self.fields]
-            return_fields = " ".join(expanded_fields)
-        else:
-            return_fields = self.fields
-
-        return f"""mutation {self.name}({definitions}) {{
-  {operation_name}({inputs}) {{
-    {return_fields}
-  }}
-}}"""
-
-    @property
-    def user_request(self):
-        request_factory = RequestFactory()
-        request = request_factory.get("/api/v2/graphql/")
-        if self.user:
-            request.user = self.user
-        return request
-
-    # Perform the mutation
-    # only keyword args please
-    def mutate(self, **kwargs) -> ExecutionResult:
-        variables = {lowercase_first_letter(snake_to_camel(name)): val for name, val in kwargs.items()}
-        required_names = set(arg["name"] for arg in self.required_arguments)
-
-        missing_args = required_names - set(variables.keys())
-        if missing_args:
-            raise ValueError(f"Missing required arguments: {missing_args}")
-
-        # Execute mutation
-        return self._schema.execute_sync(
-            query=self.serialize, variable_values=variables, context_value=self.user_request
-        )
diff --git a/main/tests/test_mutations.py b/main/tests/test_mutations.py
index 5e15a26..6428693 100644
--- a/main/tests/test_mutations.py
+++ b/main/tests/test_mutations.py
@@ -4,7 +4,6 @@ from strawberry.django.test import GraphQLTestClient
 
 from main.api.mutations import create_order
 from main.models import Order, Product
-from main.testing import MutationTest
 
 
 @pytest.fixture(name="gql_client")
@@ -17,30 +16,28 @@ def product_fix(db):
     return Product.objects.create(name="borg", sale_price_ext=35, sale_price_int=30)
 
 
-@pytest.fixture(name="create_order_mutation")
-def create_order_mutation_fixture(product):
-    fields = """
-    ... on CreateOrderSuccess {
-      order {
-        id
-        orderSum
-        orderlines {
-          id
-          product {
+def test_create_order(product, gql_client):
+    assert Order.objects.count() == 0
+    variables = dict(customerId="external", isExternal=True, orderLines=[{"productId": product.id, "amount": 1}])
+    query = """
+    mutation CreateOrder($customerId: ID!, $isExternal: Boolean!, $orderLines: [OrderLineInput!]!) {
+      createOrder(customerId: $customerId, isExternal: $isExternal, orderLines: $orderLines) {
+        ... on CreateOrderSuccess {
+          order {
             id
+            orderSum
+            orderlines {
+              id
+              product {
+                id
+              }
+            }
           }
         }
       }
-    }"""
-    # FIXME: maybe drop this helper and just use GraphQLTestClient
-    return MutationTest(create_order, fields)
-
-
-def test_create_order(product, create_order_mutation):
-    assert Order.objects.count() == 0
-    res = create_order_mutation.mutate(
-        customerId="external", isExternal=True, orderLines=[{"productId": product.id, "amount": 1}]
-    )
+    }
+    """
+    res = gql_client.query(query, variables)
     assert res
     assert not res.errors
     assert res.data