def METHOD_NAME(cfngin_context: CfnginContext) -> None:
    """Test CloudFormation Stacks don't exists."""
    client = cfngin_context.get_session(region="us-east-1").client("cloudformation")
    assert cfngin_context.stacks, "no stacks found in context/config"
    for stack in cfngin_context.stacks:
        try:
            assert not client.describe_stacks(StackName=stack.fqn)[
                "Stacks"
            ], f"stack exists: {stack.fqn}"
        except client.exceptions.ClientError as exc:
            assert "does not exist" in str(exc)