Error: moto dynamodb not working

Moto uses an isolated mock AWS environment. A DynamoDB test often fails because the client was created before mocking started, the table was never created inside the mock, or an old test imports a removed service-specific decorator. Current Moto examples use mock_aws.

import boto3
from moto import mock_aws

@mock_aws
def test_order():
    db = boto3.resource("dynamodb", region_name="us-east-1",
        aws_access_key_id="testing", aws_secret_access_key="testing")
    table = db.create_table(
        TableName="Orders",
        KeySchema=[{"AttributeName": "id", "KeyType": "HASH"}],
        AttributeDefinitions=[{"AttributeName": "id", "AttributeType": "S"}],
        BillingMode="PAY_PER_REQUEST",
    )
    table.put_item(Item={"id": "123"})
    assert table.get_item(Key={"id": "123"})["Item"]["id"] == "123"

Install Moto’s DynamoDB dependencies in the test environment, and check that the interpreter running tests uses that environment. Start mocking before importing modules that construct clients globally. Keep test credentials confined to the mock; never let a failed setup fall through to real AWS.

Mock state resets when its scope ends. Create fixtures in the same scope and Region as the tested code. If a particular API is unsupported, check Moto’s service coverage and use DynamoDB Local or a controlled AWS integration test for that behavior.

See local testing options and AWS documentation.