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Pytest plugin for AWS integration tests

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pytest-localstack is a plugin for pytest to create AWS integration tests via a Localstack Docker container.

Read The Docs


  • pytest >= 3.3.0
  • Docker

Tested against Python >= 3.6.


  • Create pytest fixtures that start and stop a Localstack container.
  • Temporarily patch botocore to redirect botocore/boto3 API calls to Localstack container.
  • Plugin system to easily extend supports to other AWS client libraries such as aiobotocore.


import boto3
import pytest_localstack

localstack = pytest_localstack.patch_fixture(
    services=["s3"],  # Limit to the AWS services you need.
    scope='module',  # Use the same Localstack container for all tests in this module.
    autouse=True,  # Automatically use this fixture in tests.

def test_s3_bucket_creation():
    s3 = boto3.resource('s3')  # Botocore/boto3 will be patched to use Localstack
    assert len(list(s3.buckets.all())) == 0
    bucket = s3.Bucket('foobar')
    assert len(list(s3.buckets.all())) == 1


  • apigateway
  • cloudformation
  • cloudwatch
  • dynamodb
  • dynamodbstreams
  • ec2
  • es
  • firehose
  • iam
  • kinesis
  • lambda
  • logs
  • redshift
  • route53
  • s3
  • secretsmanager
  • ses
  • sns
  • sqs
  • ssm
  • stepfunctions
  • sts


$ pip install pytest-localstack


  • More detailed docs.
  • Break Docker container running out of LocalstackSession.
  • Make botocore patching more comprehensible.
  • Add common test resource fixture factories i.e. S3 buckets, SQS queues, SNS topics, etc.
  • Test this works for non-localhost Docker containers.
  • Add other client libraries such as aiobotocore.

Change Log

0.4.1 (2019-08-22)

  • Raise TimeoutErrors when services fail to start from any causing exception.
  • Use more botocore client-based service checks.

0.4.0 (2019-08-21)

  • Add EC2 service.
  • Add IAM service.
  • Add Secret Manager service.
  • Add Step Functions service.
  • Add STS service.

0.3.2 (2019-08-16)

  • Track/restore original boto3.DEFAULT_SESSION during patching.

0.3.1 (2019-08-13)

  • Fix exclusion of tests from installed packages.

0.3.0 (2019-07-02)

  • Add CloudWatch Logs service.

0.2.0 (2019-03-06)

  • Use botocore to determine default AWS region (will us-east-1 fallback).
  • Replace use of pytest.config with pytest_configure() hook.

0.1.5 (2018-08-17)

  • Fix a bug involving our patched botocore Session trying to access _internal_components and getting _components instead.

0.1.4 (2018-08-03)

  • Fix pinned install requirements conflict between pytest and pluggy.

0.1.3 (2018-07-17)

  • Fix for botocore >= 1.10.58.

0.1.2 (2018-06-22)

  • Broke out LocalstackSession into RunningSession which doesn’t start localstack itself.

0.1.1 (2018-04-23)

  • Fixed bug where patched botocore clients wouldn’t populated the _exceptions attribute.

0.1.0 (2018-03-13)

  • Initial release

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