diff --git a/moto/acm/models.py b/moto/acm/models.py
index f4d1eea18..3df541982 100644
--- a/moto/acm/models.py
+++ b/moto/acm/models.py
@@ -13,7 +13,7 @@ import cryptography.hazmat.primitives.asymmetric.rsa
 from cryptography.hazmat.primitives import serialization, hashes
 from cryptography.hazmat.backends import default_backend
 
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 
 
 GOOGLE_ROOT_CA = b"""-----BEGIN CERTIFICATE-----
diff --git a/moto/athena/models.py b/moto/athena/models.py
index 2704d5277..2f41046a9 100644
--- a/moto/athena/models.py
+++ b/moto/athena/models.py
@@ -4,7 +4,7 @@ import time
 import boto3
 from moto.core import BaseBackend, BaseModel
 
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 class TaggableResourceMixin(object):
diff --git a/moto/awslambda/models.py b/moto/awslambda/models.py
index a3e7f03ef..b1b8f57a8 100644
--- a/moto/awslambda/models.py
+++ b/moto/awslambda/models.py
@@ -42,7 +42,7 @@ from .utils import make_function_arn, make_function_ver_arn
 from moto.sqs import sqs_backends
 from moto.dynamodb2 import dynamodb_backends2
 from moto.dynamodbstreams import dynamodbstreams_backends
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 logger = logging.getLogger(__name__)
 
diff --git a/moto/batch/models.py b/moto/batch/models.py
index 023575af2..e12cc8f84 100644
--- a/moto/batch/models.py
+++ b/moto/batch/models.py
@@ -28,7 +28,7 @@ from .utils import (
 from moto.ec2.exceptions import InvalidSubnetIdError
 from moto.ec2.models import INSTANCE_TYPES as EC2_INSTANCE_TYPES
 from moto.iam.exceptions import IAMNotFoundException
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 
 _orig_adapter_send = requests.adapters.HTTPAdapter.send
 logger = logging.getLogger(__name__)
diff --git a/moto/cloudformation/parsing.py b/moto/cloudformation/parsing.py
index 10a3413b8..bbe28c6c6 100644
--- a/moto/cloudformation/parsing.py
+++ b/moto/cloudformation/parsing.py
@@ -27,7 +27,7 @@ from moto.route53 import models as route53_models
 from moto.s3 import models as s3_models
 from moto.sns import models as sns_models
 from moto.sqs import models as sqs_models
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from .utils import random_suffix
 from .exceptions import (
     ExportNotFound,
diff --git a/moto/cloudformation/responses.py b/moto/cloudformation/responses.py
index 64481dd41..63429a0a7 100644
--- a/moto/cloudformation/responses.py
+++ b/moto/cloudformation/responses.py
@@ -7,7 +7,7 @@ from six.moves.urllib.parse import urlparse
 from moto.core.responses import BaseResponse
 from moto.core.utils import amzn_request_id
 from moto.s3 import s3_backend
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from .models import cloudformation_backends
 from .exceptions import ValidationError
 
diff --git a/moto/cloudformation/utils.py b/moto/cloudformation/utils.py
index 807a8ea10..6a53e6e51 100644
--- a/moto/cloudformation/utils.py
+++ b/moto/cloudformation/utils.py
@@ -7,7 +7,7 @@ import os
 import string
 
 from cfnlint import decode, core
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 def generate_stack_id(stack_name, region="us-east-1", account="123456789"):
     random_id = uuid.uuid4()
diff --git a/moto/cloudwatch/models.py b/moto/cloudwatch/models.py
index 5e8f63683..662005237 100644
--- a/moto/cloudwatch/models.py
+++ b/moto/cloudwatch/models.py
@@ -8,7 +8,7 @@ from dateutil.tz import tzutc
 from uuid import uuid4
 from .utils import make_arn_for_dashboard
 
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 
 _EMPTY_LIST = tuple()
 
diff --git a/moto/config/models.py b/moto/config/models.py
index 6302500b3..0bf602b88 100644
--- a/moto/config/models.py
+++ b/moto/config/models.py
@@ -45,7 +45,7 @@ from moto.config.exceptions import (
 from moto.core import BaseBackend, BaseModel
 from moto.s3.config import s3_config_query
 
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 POP_STRINGS = [
     "capitalizeStart",
     "CapitalizeStart",
diff --git a/moto/core/__init__.py b/moto/core/__init__.py
index 4a4dfdfb6..045124fab 100644
--- a/moto/core/__init__.py
+++ b/moto/core/__init__.py
@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 
-from .models import BaseModel, BaseBackend, moto_api_backend  # noqa
+from .models import BaseModel, BaseBackend, moto_api_backend, ACCOUNT_ID  # noqa
 from .responses import ActionAuthenticatorMixin
 
 moto_api_backends = {"global": moto_api_backend}
diff --git a/moto/core/access_control.py b/moto/core/access_control.py
index 9991063f9..971c02212 100644
--- a/moto/core/access_control.py
+++ b/moto/core/access_control.py
@@ -24,7 +24,8 @@ from botocore.awsrequest import AWSRequest
 from botocore.credentials import Credentials
 from six import string_types
 
-from moto.iam.models import ACCOUNT_ID, Policy
+from moto.core import ACCOUNT_ID 
+from moto.iam.models import Policy
 from moto.iam import iam_backend
 from moto.core.exceptions import (
     SignatureDoesNotMatchError,
diff --git a/moto/core/models.py b/moto/core/models.py
index 5b19137c3..cfffff383 100644
--- a/moto/core/models.py
+++ b/moto/core/models.py
@@ -23,6 +23,9 @@ from .utils import (
 )
 
 
+ACCOUNT_ID = os.environ.get('MOTO_ACCOUNT_ID','123456789012')
+    
+
 class BaseMockAWS(object):
     nested_count = 0
 
diff --git a/moto/dynamodb/models.py b/moto/dynamodb/models.py
index 551742642..f5771ec6e 100644
--- a/moto/dynamodb/models.py
+++ b/moto/dynamodb/models.py
@@ -6,7 +6,7 @@ import json
 from moto.compat import OrderedDict
 from moto.core import BaseBackend, BaseModel
 from moto.core.utils import unix_time
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from .comparisons import get_comparison_func
 
 
diff --git a/moto/ec2/responses/instances.py b/moto/ec2/responses/instances.py
index 32fa2e991..621e5abe7 100644
--- a/moto/ec2/responses/instances.py
+++ b/moto/ec2/responses/instances.py
@@ -6,7 +6,7 @@ from moto.core.responses import BaseResponse
 from moto.core.utils import camelcase_to_underscores
 from moto.ec2.utils import filters_from_querystring, dict_from_querystring
 from moto.elbv2 import elbv2_backends
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 class InstanceResponse(BaseResponse):
     def describe_instances(self):
diff --git a/moto/ec2/responses/security_groups.py b/moto/ec2/responses/security_groups.py
index e74dc7157..c2d789ea0 100644
--- a/moto/ec2/responses/security_groups.py
+++ b/moto/ec2/responses/security_groups.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 from moto.core.responses import BaseResponse
 from moto.ec2.utils import filters_from_querystring
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 def try_parse_int(value, default=None):
diff --git a/moto/ec2/responses/vpc_peering_connections.py b/moto/ec2/responses/vpc_peering_connections.py
index df33ecf77..62ab53401 100644
--- a/moto/ec2/responses/vpc_peering_connections.py
+++ b/moto/ec2/responses/vpc_peering_connections.py
@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 from moto.core.responses import BaseResponse
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 class VPCPeeringConnections(BaseResponse):
diff --git a/moto/iam/models.py b/moto/iam/models.py
index dd598c975..5bbd9235d 100644
--- a/moto/iam/models.py
+++ b/moto/iam/models.py
@@ -14,7 +14,7 @@ from cryptography.hazmat.backends import default_backend
 from six.moves.urllib.parse import urlparse
 
 from moto.core.exceptions import RESTError
-from moto.core import BaseBackend, BaseModel
+from moto.core import BaseBackend, BaseModel, ACCOUNT_ID
 from moto.core.utils import (
     iso_8601_datetime_without_milliseconds,
     iso_8601_datetime_with_milliseconds,
@@ -45,8 +45,6 @@ from .utils import (
     random_policy_id,
 )
 
-ACCOUNT_ID = '123456789012'
-
 
 class MFADevice(object):
     """MFA Device class."""
diff --git a/moto/kinesis/exceptions.py b/moto/kinesis/exceptions.py
index 403823b6c..1f25d6720 100644
--- a/moto/kinesis/exceptions.py
+++ b/moto/kinesis/exceptions.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 import json
 from werkzeug.exceptions import BadRequest
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 class ResourceNotFoundError(BadRequest):
diff --git a/moto/kinesis/models.py b/moto/kinesis/models.py
index 03eadc084..48642f197 100644
--- a/moto/kinesis/models.py
+++ b/moto/kinesis/models.py
@@ -13,7 +13,7 @@ from hashlib import md5
 from moto.compat import OrderedDict
 from moto.core import BaseBackend, BaseModel
 from moto.core.utils import unix_time
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from .exceptions import (
     StreamNotFoundError,
     ShardNotFoundError,
diff --git a/moto/opsworks/models.py b/moto/opsworks/models.py
index d456306ce..96d918cc9 100644
--- a/moto/opsworks/models.py
+++ b/moto/opsworks/models.py
@@ -1,7 +1,7 @@
 from __future__ import unicode_literals
 from moto.core import BaseBackend, BaseModel
 from moto.ec2 import ec2_backends
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 import uuid
 import datetime
 from random import choice
diff --git a/moto/organizations/utils.py b/moto/organizations/utils.py
index 0a685c629..e71357ce6 100644
--- a/moto/organizations/utils.py
+++ b/moto/organizations/utils.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 import random
 import string
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 MASTER_ACCOUNT_ID = ACCOUNT_ID
diff --git a/moto/polly/models.py b/moto/polly/models.py
index f35bc1f5c..f91c80c64 100644
--- a/moto/polly/models.py
+++ b/moto/polly/models.py
@@ -8,7 +8,7 @@ from moto.core import BaseBackend, BaseModel
 from .resources import VOICE_DATA
 from .utils import make_arn_for_lexicon
 
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 
 
 class Lexicon(BaseModel):
diff --git a/moto/redshift/models.py b/moto/redshift/models.py
index 3c7a608e3..2c57c0f06 100644
--- a/moto/redshift/models.py
+++ b/moto/redshift/models.py
@@ -27,7 +27,7 @@ from .exceptions import (
 )
 
 
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 class TaggableResourceMixin(object):
diff --git a/moto/resourcegroups/models.py b/moto/resourcegroups/models.py
index 4924a7131..7d4d88230 100644
--- a/moto/resourcegroups/models.py
+++ b/moto/resourcegroups/models.py
@@ -6,7 +6,7 @@ import json
 import re
 
 from moto.core import BaseBackend, BaseModel
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from .exceptions import BadRequestException
 
 
diff --git a/moto/s3/responses.py b/moto/s3/responses.py
index ff3bec9cf..820f8e2dd 100644
--- a/moto/s3/responses.py
+++ b/moto/s3/responses.py
@@ -13,7 +13,7 @@ import xmltodict
 from moto.packages.httpretty.core import HTTPrettyRequest
 from moto.core.responses import _TemplateEnvironmentMixin, ActionAuthenticatorMixin
 from moto.core.utils import path_url
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 from moto.s3bucket_path.utils import (
     bucket_name_from_url as bucketpath_bucket_name_from_url,
diff --git a/moto/ses/feedback.py b/moto/ses/feedback.py
index c9ab6ed6c..7161a2c37 100644
--- a/moto/ses/feedback.py
+++ b/moto/ses/feedback.py
@@ -1,4 +1,4 @@
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 """
 SES Feedback messages
 Extracted from https://docs.aws.amazon.com/ses/latest/DeveloperGuide/notification-contents.html
diff --git a/moto/sns/models.py b/moto/sns/models.py
index e4d2cc3bd..920bdada1 100644
--- a/moto/sns/models.py
+++ b/moto/sns/models.py
@@ -12,7 +12,6 @@ from boto3 import Session
 
 from moto.compat import OrderedDict
 from moto.core import BaseBackend, BaseModel
-from moto.iam.models import ACCOUNT_ID
 from moto.core.utils import (
     iso_8601_datetime_with_milliseconds,
     camelcase_to_underscores,
@@ -32,7 +31,7 @@ from .exceptions import (
 )
 from .utils import make_arn_for_topic, make_arn_for_subscription, is_e164
 
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 DEFAULT_PAGE_SIZE = 100
 MAXIMUM_MESSAGE_LENGTH = 262144  # 256 KiB
 
@@ -260,7 +259,7 @@ class Subscription(BaseModel):
             "SignatureVersion": "1",
             "Signature": "EXAMPLElDMXvB8r9R83tGoNn0ecwd5UjllzsvSvbItzfaMpN2nk5HVSw7XnOn/49IkxDKz8YrlH2qJXj2iZB0Zo2O71c4qQk1fMUDi3LGpij7RCW7AW9vYYsSqIKRnFS94ilu7NFhUzLiieYr4BKHpdTmdD6c0esKEYBpabxDSc=",
             "SigningCertURL": "https://sns.us-east-1.amazonaws.com/SimpleNotificationService-f3ecfb7224c7233fe7bb5f59f96de52f.pem",
-            "UnsubscribeURL": "https://sns.us-east-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:{}:some-topic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55".format(ACCOUNT_ID),
+            "UnsubscribeURL": "https://sns.us-east-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:{}:some-topic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55".format(DEFAULT_ACCOUNT_ID),
         }
         if message_attributes:
             post_data["MessageAttributes"] = message_attributes
@@ -277,7 +276,7 @@ class PlatformApplication(BaseModel):
     @property
     def arn(self):
         return "arn:aws:sns:{region}:{AccountId}:app/{platform}/{name}".format(
-            region=self.region, platform=self.platform, name=self.name, AccountId=ACCOUNT_ID
+            region=self.region, platform=self.platform, name=self.name, AccountId=DEFAULT_ACCOUNT_ID
         )
 
 
@@ -308,7 +307,7 @@ class PlatformEndpoint(BaseModel):
     def arn(self):
         return "arn:aws:sns:{region}:{AccountId}:endpoint/{platform}/{name}/{id}".format(
             region=self.region,
-            AccountId=ACCOUNT_ID,
+            AccountId=DEFAULT_ACCOUNT_ID,
             platform=self.application.platform,
             name=self.application.name,
             id=self.id,
diff --git a/moto/sqs/models.py b/moto/sqs/models.py
index e9742a3de..5a9c1b031 100644
--- a/moto/sqs/models.py
+++ b/moto/sqs/models.py
@@ -12,7 +12,6 @@ import boto.sqs
 
 from moto.core.exceptions import RESTError
 from moto.core import BaseBackend, BaseModel
-from moto.iam.models import ACCOUNT_ID
 from moto.core.utils import (
     camelcase_to_underscores,
     get_random_message_id,
@@ -33,7 +32,7 @@ from .exceptions import (
     InvalidAttributeName,
 )
 
-from moto.iam.models import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
+from moto.core import ACCOUNT_ID as DEFAULT_ACCOUNT_ID
 DEFAULT_SENDER_ID = "AIDAIT2UOQQY3AUEKVGXU"
 
 MAXIMUM_MESSAGE_LENGTH = 262144  # 256 KiB
@@ -419,7 +418,7 @@ class Queue(BaseModel):
 
     def url(self, request_url):
         return "{0}://{1}/{2}/{3}".format(
-            request_url.scheme, request_url.netloc, ACCOUNT_ID, self.name
+            request_url.scheme, request_url.netloc, DEFAULT_ACCOUNT_ID, self.name
         )
 
     @property
diff --git a/moto/sts/models.py b/moto/sts/models.py
index d3afc9904..12824b2ed 100644
--- a/moto/sts/models.py
+++ b/moto/sts/models.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 import datetime
 from moto.core import BaseBackend, BaseModel
 from moto.core.utils import iso_8601_datetime_with_milliseconds
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from moto.sts.utils import (
     random_access_key_id,
     random_secret_access_key,
diff --git a/moto/sts/responses.py b/moto/sts/responses.py
index f6d8647c4..f36799b03 100644
--- a/moto/sts/responses.py
+++ b/moto/sts/responses.py
@@ -1,7 +1,7 @@
 from __future__ import unicode_literals
 
 from moto.core.responses import BaseResponse
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from moto.iam import iam_backend
 from .exceptions import STSValidationError
 from .models import sts_backend
diff --git a/tests/test_acm/test_acm.py b/tests/test_acm/test_acm.py
index edc10fb29..52d00b390 100644
--- a/tests/test_acm/test_acm.py
+++ b/tests/test_acm/test_acm.py
@@ -9,7 +9,7 @@ import uuid
 from botocore.exceptions import ClientError
 
 from moto import mock_acm
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 RESOURCE_FOLDER = os.path.join(os.path.dirname(__file__), "resources")
diff --git a/tests/test_apigateway/test_apigateway.py b/tests/test_apigateway/test_apigateway.py
index 186c2f7ff..72f2833c8 100644
--- a/tests/test_apigateway/test_apigateway.py
+++ b/tests/test_apigateway/test_apigateway.py
@@ -9,7 +9,7 @@ from botocore.exceptions import ClientError
 
 import responses
 from moto import mock_apigateway, settings
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from nose.tools import assert_raises
 
 
diff --git a/tests/test_autoscaling/test_launch_configurations.py b/tests/test_autoscaling/test_launch_configurations.py
index 139a6dde6..99e078cb3 100644
--- a/tests/test_autoscaling/test_launch_configurations.py
+++ b/tests/test_autoscaling/test_launch_configurations.py
@@ -8,7 +8,7 @@ import sure  # noqa
 
 from moto import mock_autoscaling_deprecated
 from moto import mock_autoscaling
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from tests.helpers import requires_boto_gte
 
 
diff --git a/tests/test_cloudformation/test_cloudformation_stack_crud.py b/tests/test_cloudformation/test_cloudformation_stack_crud.py
index 28a729b00..75f705ea7 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_crud.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_crud.py
@@ -14,7 +14,7 @@ import sure  # noqa
 # Ensure 'assert_raises' context manager support for Python 2.6
 import tests.backport_assert_raises  # noqa
 from nose.tools import assert_raises
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 from moto import (
     mock_cloudformation_deprecated,
diff --git a/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py b/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
index 0af1e55e6..b8ea7d8f7 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
@@ -11,7 +11,7 @@ import sure  # noqa
 from nose.tools import assert_raises
 
 from moto import mock_cloudformation, mock_s3, mock_sqs, mock_ec2
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 dummy_template = {
     "AWSTemplateFormatVersion": "2010-09-09",
diff --git a/tests/test_cloudformation/test_cloudformation_stack_integration.py b/tests/test_cloudformation/test_cloudformation_stack_integration.py
index 16f6279f0..0ae41d7b2 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_integration.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_integration.py
@@ -43,7 +43,7 @@ from moto import (
     mock_sqs_deprecated,
     mock_elbv2,
 )
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from moto.dynamodb2.models import Table
 
 from .fixtures import (
diff --git a/tests/test_cognitoidentity/test_cognitoidentity.py b/tests/test_cognitoidentity/test_cognitoidentity.py
index d2bc7851b..33a8aeab1 100644
--- a/tests/test_cognitoidentity/test_cognitoidentity.py
+++ b/tests/test_cognitoidentity/test_cognitoidentity.py
@@ -6,7 +6,7 @@ from nose.tools import assert_raises
 
 from moto import mock_cognitoidentity
 from moto.cognitoidentity.utils import get_random_identity_id
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 @mock_cognitoidentity
 def test_create_identity_pool():
diff --git a/tests/test_cognitoidp/test_cognitoidp.py b/tests/test_cognitoidp/test_cognitoidp.py
index c7ba8ba38..754c11d03 100644
--- a/tests/test_cognitoidp/test_cognitoidp.py
+++ b/tests/test_cognitoidp/test_cognitoidp.py
@@ -14,7 +14,7 @@ from jose import jws
 from nose.tools import assert_raises
 
 from moto import mock_cognitoidp
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_cognitoidp
diff --git a/tests/test_config/test_config.py b/tests/test_config/test_config.py
index 390e0f8ae..146683c90 100644
--- a/tests/test_config/test_config.py
+++ b/tests/test_config/test_config.py
@@ -7,7 +7,7 @@ from nose.tools import assert_raises
 
 from moto import mock_s3
 from moto.config import mock_config
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 @mock_config
 def test_put_configuration_recorder():
diff --git a/tests/test_core/test_auth.py b/tests/test_core/test_auth.py
index 60d15cf51..a8fde5d8c 100644
--- a/tests/test_core/test_auth.py
+++ b/tests/test_core/test_auth.py
@@ -10,7 +10,7 @@ from nose.tools import assert_raises
 
 from moto import mock_iam, mock_ec2, mock_s3, mock_sts, mock_elbv2, mock_rds2
 from moto.core import set_initial_no_auth_action_count
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from uuid import uuid4
 
 
diff --git a/tests/test_ec2/test_spot_fleet.py b/tests/test_ec2/test_spot_fleet.py
index 1c1937492..671b31215 100644
--- a/tests/test_ec2/test_spot_fleet.py
+++ b/tests/test_ec2/test_spot_fleet.py
@@ -4,7 +4,7 @@ import boto3
 import sure  # noqa
 
 from moto import mock_ec2
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 def get_subnet_id(conn):
diff --git a/tests/test_elb/test_elb.py b/tests/test_elb/test_elb.py
index bbfebe309..1becbe2f1 100644
--- a/tests/test_elb/test_elb.py
+++ b/tests/test_elb/test_elb.py
@@ -15,7 +15,7 @@ from nose.tools import assert_raises
 import sure  # noqa
 
 from moto import mock_elb, mock_ec2, mock_elb_deprecated, mock_ec2_deprecated
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_elb_deprecated
diff --git a/tests/test_elbv2/test_elbv2.py b/tests/test_elbv2/test_elbv2.py
index 20ab5230e..77a908e18 100644
--- a/tests/test_elbv2/test_elbv2.py
+++ b/tests/test_elbv2/test_elbv2.py
@@ -10,7 +10,7 @@ import sure  # noqa
 
 from moto import mock_elbv2, mock_ec2, mock_acm, mock_cloudformation
 from moto.elbv2 import elbv2_backends
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_elbv2
diff --git a/tests/test_events/test_events.py b/tests/test_events/test_events.py
index 971d32287..57be06f4c 100644
--- a/tests/test_events/test_events.py
+++ b/tests/test_events/test_events.py
@@ -6,7 +6,7 @@ import sure  # noqa
 from moto.events import mock_events
 from botocore.exceptions import ClientError
 from nose.tools import assert_raises
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 RULES = [
     {"Name": "test1", "ScheduleExpression": "rate(5 minutes)"},
diff --git a/tests/test_iam/test_iam.py b/tests/test_iam/test_iam.py
index 17f3939a6..81a0b5a34 100644
--- a/tests/test_iam/test_iam.py
+++ b/tests/test_iam/test_iam.py
@@ -13,7 +13,7 @@ from dateutil.tz import tzutc
 
 from moto import mock_iam, mock_iam_deprecated
 from moto.iam.models import aws_managed_policies
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from nose.tools import assert_raises, assert_equals
 from nose.tools import raises
 
diff --git a/tests/test_iam/test_iam_groups.py b/tests/test_iam/test_iam_groups.py
index 6e33a4cec..dba331bb9 100644
--- a/tests/test_iam/test_iam_groups.py
+++ b/tests/test_iam/test_iam_groups.py
@@ -10,7 +10,7 @@ from nose.tools import assert_raises
 from boto.exception import BotoServerError
 from botocore.exceptions import ClientError
 from moto import mock_iam, mock_iam_deprecated
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 MOCK_POLICY = """
 {
diff --git a/tests/test_kinesis/test_firehose.py b/tests/test_kinesis/test_firehose.py
index f5425c563..7ec84bb10 100644
--- a/tests/test_kinesis/test_firehose.py
+++ b/tests/test_kinesis/test_firehose.py
@@ -7,7 +7,7 @@ import boto3
 import sure  # noqa
 
 from moto import mock_kinesis
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 def create_s3_delivery_stream(client, stream_name):
diff --git a/tests/test_kinesis/test_kinesis.py b/tests/test_kinesis/test_kinesis.py
index 77b7873bf..8ae83484b 100644
--- a/tests/test_kinesis/test_kinesis.py
+++ b/tests/test_kinesis/test_kinesis.py
@@ -8,7 +8,7 @@ import boto3
 from boto.kinesis.exceptions import ResourceNotFoundException, InvalidArgumentException
 
 from moto import mock_kinesis, mock_kinesis_deprecated
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_kinesis_deprecated
diff --git a/tests/test_redshift/test_redshift.py b/tests/test_redshift/test_redshift.py
index 5017529da..aeb04e6a0 100644
--- a/tests/test_redshift/test_redshift.py
+++ b/tests/test_redshift/test_redshift.py
@@ -18,7 +18,7 @@ from moto import mock_ec2
 from moto import mock_ec2_deprecated
 from moto import mock_redshift
 from moto import mock_redshift_deprecated
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 @mock_redshift
 def test_create_cluster_boto3():
diff --git a/tests/test_ses/test_ses_sns_boto3.py b/tests/test_ses/test_ses_sns_boto3.py
index f4b9cd4a5..fc58d88aa 100644
--- a/tests/test_ses/test_ses_sns_boto3.py
+++ b/tests/test_ses/test_ses_sns_boto3.py
@@ -10,7 +10,7 @@ import sure  # noqa
 from nose import tools
 from moto import mock_ses, mock_sns, mock_sqs
 from moto.ses.models import SESFeedback
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_ses
diff --git a/tests/test_sns/test_application.py b/tests/test_sns/test_application.py
index 209b53c54..e4fe93d53 100644
--- a/tests/test_sns/test_application.py
+++ b/tests/test_sns/test_application.py
@@ -3,7 +3,7 @@ from __future__ import unicode_literals
 import boto
 from boto.exception import BotoServerError
 from moto import mock_sns_deprecated
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 import sure  # noqa
 
 
diff --git a/tests/test_sns/test_application_boto3.py b/tests/test_sns/test_application_boto3.py
index 9bc94cdb9..6f9be2926 100644
--- a/tests/test_sns/test_application_boto3.py
+++ b/tests/test_sns/test_application_boto3.py
@@ -4,7 +4,7 @@ import boto3
 from botocore.exceptions import ClientError
 from moto import mock_sns
 import sure  # noqa
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_sns
diff --git a/tests/test_sns/test_publishing.py b/tests/test_sns/test_publishing.py
index 58584bf36..80e61f625 100644
--- a/tests/test_sns/test_publishing.py
+++ b/tests/test_sns/test_publishing.py
@@ -7,7 +7,7 @@ from freezegun import freeze_time
 import sure  # noqa
 
 from moto import mock_sns_deprecated, mock_sqs_deprecated
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 MESSAGE_FROM_SQS_TEMPLATE = '{\n  "Message": "%s",\n  "MessageId": "%s",\n  "Signature": "EXAMPLElDMXvB8r9R83tGoNn0ecwd5UjllzsvSvbItzfaMpN2nk5HVSw7XnOn/49IkxDKz8YrlH2qJXj2iZB0Zo2O71c4qQk1fMUDi3LGpij7RCW7AW9vYYsSqIKRnFS94ilu7NFhUzLiieYr4BKHpdTmdD6c0esKEYBpabxDSc=",\n  "SignatureVersion": "1",\n  "SigningCertURL": "https://sns.us-east-1.amazonaws.com/SimpleNotificationService-f3ecfb7224c7233fe7bb5f59f96de52f.pem",\n  "Subject": "%s",\n  "Timestamp": "2015-01-01T12:00:00.000Z",\n  "TopicArn": "arn:aws:sns:%s:'+ACCOUNT_ID+':some-topic",\n  "Type": "Notification",\n  "UnsubscribeURL": "https://sns.us-east-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:'+ACCOUNT_ID+':some-topic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55"\n}'
 
diff --git a/tests/test_sns/test_publishing_boto3.py b/tests/test_sns/test_publishing_boto3.py
index dfa7c27e7..c84af9ade 100644
--- a/tests/test_sns/test_publishing_boto3.py
+++ b/tests/test_sns/test_publishing_boto3.py
@@ -12,7 +12,7 @@ import responses
 from botocore.exceptions import ClientError
 from nose.tools import assert_raises
 from moto import mock_sns, mock_sqs
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 MESSAGE_FROM_SQS_TEMPLATE = '{\n  "Message": "%s",\n  "MessageId": "%s",\n  "Signature": "EXAMPLElDMXvB8r9R83tGoNn0ecwd5UjllzsvSvbItzfaMpN2nk5HVSw7XnOn/49IkxDKz8YrlH2qJXj2iZB0Zo2O71c4qQk1fMUDi3LGpij7RCW7AW9vYYsSqIKRnFS94ilu7NFhUzLiieYr4BKHpdTmdD6c0esKEYBpabxDSc=",\n  "SignatureVersion": "1",\n  "SigningCertURL": "https://sns.us-east-1.amazonaws.com/SimpleNotificationService-f3ecfb7224c7233fe7bb5f59f96de52f.pem",\n  "Subject": "my subject",\n  "Timestamp": "2015-01-01T12:00:00.000Z",\n  "TopicArn": "arn:aws:sns:%s:'+ACCOUNT_ID+':some-topic",\n  "Type": "Notification",\n  "UnsubscribeURL": "https://sns.us-east-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:'+ACCOUNT_ID+':some-topic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55"\n}'
 
diff --git a/tests/test_sns/test_server.py b/tests/test_sns/test_server.py
index 1d6bdd6b9..78bc147df 100644
--- a/tests/test_sns/test_server.py
+++ b/tests/test_sns/test_server.py
@@ -1,5 +1,5 @@
 from __future__ import unicode_literals
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 import sure  # noqa
 
diff --git a/tests/test_sns/test_topics.py b/tests/test_sns/test_topics.py
index 25f4f8a4c..57bef29f0 100644
--- a/tests/test_sns/test_topics.py
+++ b/tests/test_sns/test_topics.py
@@ -8,7 +8,7 @@ import sure  # noqa
 from boto.exception import BotoServerError
 from moto import mock_sns_deprecated
 from moto.sns.models import DEFAULT_EFFECTIVE_DELIVERY_POLICY, DEFAULT_PAGE_SIZE
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 
 @mock_sns_deprecated
diff --git a/tests/test_sns/test_topics_boto3.py b/tests/test_sns/test_topics_boto3.py
index 4e7583378..d06dafcb6 100644
--- a/tests/test_sns/test_topics_boto3.py
+++ b/tests/test_sns/test_topics_boto3.py
@@ -8,7 +8,7 @@ import sure  # noqa
 from botocore.exceptions import ClientError
 from moto import mock_sns
 from moto.sns.models import DEFAULT_EFFECTIVE_DELIVERY_POLICY, DEFAULT_PAGE_SIZE
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 @mock_sns
 def test_create_and_delete_topic():
diff --git a/tests/test_sqs/test_sqs.py b/tests/test_sqs/test_sqs.py
index 6fa8a3504..0f900f4c2 100644
--- a/tests/test_sqs/test_sqs.py
+++ b/tests/test_sqs/test_sqs.py
@@ -21,7 +21,7 @@ from moto import mock_sqs, mock_sqs_deprecated, settings
 from nose import SkipTest
 from nose.tools import assert_raises
 from tests.helpers import requires_boto_gte
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 @mock_sqs
 def test_create_fifo_queue_fail():
diff --git a/tests/test_stepfunctions/test_stepfunctions.py b/tests/test_stepfunctions/test_stepfunctions.py
index 91c7df9f7..5c4ba97ae 100644
--- a/tests/test_stepfunctions/test_stepfunctions.py
+++ b/tests/test_stepfunctions/test_stepfunctions.py
@@ -9,7 +9,7 @@ from botocore.exceptions import ClientError
 from nose.tools import assert_raises
 
 from moto import mock_sts, mock_stepfunctions
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 
 region = "us-east-1"
 simple_definition = (
diff --git a/tests/test_sts/test_sts.py b/tests/test_sts/test_sts.py
index 2cb1c49e7..4dee9184f 100644
--- a/tests/test_sts/test_sts.py
+++ b/tests/test_sts/test_sts.py
@@ -10,7 +10,7 @@ import sure  # noqa
 
 
 from moto import mock_sts, mock_sts_deprecated, mock_iam, settings
-from moto.iam.models import ACCOUNT_ID
+from moto.core import ACCOUNT_ID
 from moto.sts.responses import MAX_FEDERATION_TOKEN_POLICY_LENGTH