diff --git a/services/autoscaling/tests/unit/test_utils_ec2.py b/services/autoscaling/tests/unit/test_utils_ec2.py
index a55645af51de..4fc17a95a344 100644
--- a/services/autoscaling/tests/unit/test_utils_ec2.py
+++ b/services/autoscaling/tests/unit/test_utils_ec2.py
@@ -5,12 +5,10 @@
 
 import pytest
 from aws_library.ec2 import EC2InstanceType, Resources
+from aws_library.ec2._errors import EC2InstanceNotFoundError
 from faker import Faker
 from pydantic import ByteSize
-from simcore_service_autoscaling.core.errors import (
-    ConfigurationError,
-    Ec2InstanceNotFoundError,
-)
+from simcore_service_autoscaling.core.errors import ConfigurationError
 from simcore_service_autoscaling.utils.utils_ec2 import (
     closest_instance_policy,
     compose_user_data,
@@ -30,7 +28,7 @@ async def test_find_best_fitting_ec2_instance_with_no_instances_raises():
 async def test_find_best_fitting_ec2_instance_closest_instance_policy_with_resource_0_raises(
     random_fake_available_instances: list[EC2InstanceType],
 ):
-    with pytest.raises(Ec2InstanceNotFoundError):
+    with pytest.raises(EC2InstanceNotFoundError):
         find_best_fitting_ec2_instance(
             allowed_ec2_instances=random_fake_available_instances,
             resources=Resources(cpus=0, ram=ByteSize(0)),