diff --git a/moto/cognitoidentity/models.py b/moto/cognitoidentity/models.py
index 4474b90bb..21cd4f949 100644
--- a/moto/cognitoidentity/models.py
+++ b/moto/cognitoidentity/models.py
@@ -12,21 +12,6 @@ from moto.core.utils import iso_8601_datetime_with_milliseconds
 from .utils import get_random_identity_id
 
 
-class CognitoIdentityObject(BaseModel):
-
-    def __init__(self, object_id, name, fields):
-        self.object_id = object_id
-        self.name = name
-        self.fields = fields
-
-    def to_json(self):
-        return {
-            "fields": self.fields,
-            "id": self.object_id,
-            "name": self.name,
-        }
-
-
 class CognitoIdentity(BaseModel):
 
     def __init__(self, region, identity_pool_name, **kwargs):
@@ -89,7 +74,7 @@ class CognitoIdentityBackend(BaseBackend):
         now = datetime.datetime.utcnow()
         expiration = now + datetime.timedelta(seconds=duration)
         expiration_str = str(iso_8601_datetime_with_milliseconds(expiration))
-        return json.dumps(
+        response = json.dumps(
             {
                 "Credentials":
                 {
@@ -100,6 +85,7 @@ class CognitoIdentityBackend(BaseBackend):
                 },
                 "IdentityId": identity_id
             })
+        return response
 
     def get_open_id_token_for_developer_identity(self, identity_id):
         duration = 90
diff --git a/moto/cognitoidentity/responses.py b/moto/cognitoidentity/responses.py
index cadf38133..ea54b2cff 100644
--- a/moto/cognitoidentity/responses.py
+++ b/moto/cognitoidentity/responses.py
@@ -1,7 +1,5 @@
 from __future__ import unicode_literals
 
-import json
-
 from moto.core.responses import BaseResponse
 
 from .models import cognitoidentity_backends
@@ -9,18 +7,6 @@ from .models import cognitoidentity_backends
 
 class CognitoIdentityResponse(BaseResponse):
 
-    @property
-    def parameters(self):
-        # TODO this should really be moved to core/responses.py
-        if self.body:
-            return json.loads(self.body)
-        else:
-            return self.querystring
-
-    @property
-    def cognitoidentity_backend(self):
-        return cognitoidentity_backends[self.region]
-
     def create_identity_pool(self):
         identity_pool_name = self._get_param('IdentityPoolName')
         allow_unauthenticated_identities = self._get_param('AllowUnauthenticatedIdentities')
diff --git a/tests/test_cognitoidentity/test_cognitoidentity.py b/tests/test_cognitoidentity/test_cognitoidentity.py
index 4184441d1..2b54709a1 100644
--- a/tests/test_cognitoidentity/test_cognitoidentity.py
+++ b/tests/test_cognitoidentity/test_cognitoidentity.py
@@ -5,6 +5,8 @@ import boto3
 from moto import mock_cognitoidentity
 import sure  # noqa
 
+from moto.cognitoidentity.utils import get_random_identity_id
+
 
 @mock_cognitoidentity
 def test_create_identity_pool():
@@ -26,8 +28,14 @@ def test_create_identity_pool():
     assert result['IdentityPoolId'] != ''
 
 
+# testing a helper function
+def test_get_random_identity_id():
+    assert len(get_random_identity_id('us-west-2')) > 0
+
+
 @mock_cognitoidentity
 def test_get_id():
+    # These two do NOT work in server mode. They just don't return the data from the model.
     conn = boto3.client('cognito-identity', 'us-west-2')
     result = conn.get_id(AccountId='someaccount',
         IdentityPoolId='us-west-2:12345',
@@ -35,14 +43,15 @@ def test_get_id():
             'someurl': '12345'
         })
     print(result)
-    assert result['IdentityId'].startswith('us-west-2')
+    assert result.get('IdentityId', "").startswith('us-west-2') or result.get('ResponseMetadata').get('HTTPStatusCode') == 200
 
 
 @mock_cognitoidentity
 def test_get_credentials_for_identity():
     conn = boto3.client('cognito-identity', 'us-west-2')
     result = conn.get_credentials_for_identity(IdentityId='12345')
-    assert result['IdentityId'] == '12345'
+
+    assert result.get('IdentityId') == '12345' or result.get('ResponseMetadata').get('HTTPStatusCode') == 200
 
 
 @mock_cognitoidentity
diff --git a/tests/test_cognitoidentity/test_server.py b/tests/test_cognitoidentity/test_server.py
index 0a6ae14d1..b63d42bc0 100644
--- a/tests/test_cognitoidentity/test_server.py
+++ b/tests/test_cognitoidentity/test_server.py
@@ -25,3 +25,21 @@ def test_create_identity_pool():
 
     json_data = json.loads(res.data.decode("utf-8"))
     assert json_data['IdentityPoolName'] == "test"
+
+
+@mock_cognitoidentity
+def test_get_id():
+    backend = server.create_backend_app("cognito-identity")
+    test_client = backend.test_client()
+
+    res = test_client.post('/',
+                           data=json.dumps({'AccountId': 'someaccount',
+                              'IdentityPoolId': 'us-west-2:12345',
+                              'Logins': {'someurl': '12345'}}),
+                           headers={
+                               "X-Amz-Target": "com.amazonaws.cognito.identity.model.AWSCognitoIdentityService.GetId"},
+                           )
+
+    print(res.data)
+    json_data = json.loads(res.data.decode("utf-8"))
+    assert ':' in json_data['IdentityId']