diff --git a/IMPLEMENTATION_COVERAGE.md b/IMPLEMENTATION_COVERAGE.md
index 946ad7970..06de16edc 100644
--- a/IMPLEMENTATION_COVERAGE.md
+++ b/IMPLEMENTATION_COVERAGE.md
@@ -4810,6 +4810,38 @@
 - [ ] validate_resource_policy
 </details>
 
+## servicediscovery
+<details>
+<summary>61% implemented</summary>
+
+- [X] create_http_namespace
+- [X] create_private_dns_namespace
+- [X] create_public_dns_namespace
+- [X] create_service
+- [X] delete_namespace
+- [X] delete_service
+- [ ] deregister_instance
+- [ ] discover_instances
+- [ ] get_instance
+- [ ] get_instances_health_status
+- [X] get_namespace
+- [X] get_operation
+- [X] get_service
+- [ ] list_instances
+- [X] list_namespaces
+- [X] list_operations
+- [X] list_services
+- [X] list_tags_for_resource
+- [ ] register_instance
+- [X] tag_resource
+- [X] untag_resource
+- [ ] update_http_namespace
+- [ ] update_instance_custom_health_status
+- [ ] update_private_dns_namespace
+- [ ] update_public_dns_namespace
+- [X] update_service
+</details>
+
 ## ses
 <details>
 <summary>32% implemented</summary>
@@ -5544,7 +5576,6 @@
 - service-quotas
 - servicecatalog
 - servicecatalog-appregistry
-- servicediscovery
 - sesv2
 - shield
 - signer
diff --git a/docs/docs/services/servicediscovery.rst b/docs/docs/services/servicediscovery.rst
new file mode 100644
index 000000000..196dcc94a
--- /dev/null
+++ b/docs/docs/services/servicediscovery.rst
@@ -0,0 +1,68 @@
+.. _implementedservice_servicediscovery:
+
+.. |start-h3| raw:: html
+
+    <h3>
+
+.. |end-h3| raw:: html
+
+    </h3>
+
+================
+servicediscovery
+================
+
+.. autoclass:: moto.servicediscovery.models.ServiceDiscoveryBackend
+
+|start-h3| Example usage |end-h3|
+
+.. sourcecode:: python
+
+            @mock_servicediscovery
+            def test_servicediscovery_behaviour:
+                boto3.client("servicediscovery")
+                ...
+
+
+
+|start-h3| Implemented features for this service |end-h3|
+
+- [X] create_http_namespace
+- [X] create_private_dns_namespace
+- [X] create_public_dns_namespace
+- [X] create_service
+- [X] delete_namespace
+- [X] delete_service
+- [ ] deregister_instance
+- [ ] discover_instances
+- [ ] get_instance
+- [ ] get_instances_health_status
+- [X] get_namespace
+- [X] get_operation
+- [X] get_service
+- [ ] list_instances
+- [X] list_namespaces
+  
+        Pagination or the Filters-parameter is not yet implemented
+        
+
+- [X] list_operations
+  
+        Pagination or the Filters-argument is not yet implemented
+        
+
+- [X] list_services
+  
+        Pagination or the Filters-argument is not yet implemented
+        
+
+- [X] list_tags_for_resource
+- [ ] register_instance
+- [X] tag_resource
+- [X] untag_resource
+- [ ] update_http_namespace
+- [ ] update_instance_custom_health_status
+- [ ] update_private_dns_namespace
+- [ ] update_public_dns_namespace
+- [X] update_service
+
diff --git a/moto/__init__.py b/moto/__init__.py
index 3178dc64c..00036dbaa 100644
--- a/moto/__init__.py
+++ b/moto/__init__.py
@@ -130,6 +130,7 @@ mock_sagemaker = lazy_load(".sagemaker", "mock_sagemaker")
 mock_sdb = lazy_load(".sdb", "mock_sdb")
 mock_secretsmanager = lazy_load(".secretsmanager", "mock_secretsmanager")
 mock_ses = lazy_load(".ses", "mock_ses")
+mock_servicediscovery = lazy_load(".servicediscovery", "mock_servicediscovery")
 mock_sns = lazy_load(".sns", "mock_sns")
 mock_sqs = lazy_load(".sqs", "mock_sqs")
 mock_ssm = lazy_load(".ssm", "mock_ssm")
diff --git a/moto/backend_index.py b/moto/backend_index.py
index f58ad44d5..7a60336e3 100644
--- a/moto/backend_index.py
+++ b/moto/backend_index.py
@@ -124,6 +124,10 @@ backend_url_patterns = [
     ("sagemaker", re.compile("https?://api.sagemaker\\.(.+)\\.amazonaws.com")),
     ("sdb", re.compile("https?://sdb\\.(.+)\\.amazonaws\\.com")),
     ("secretsmanager", re.compile("https?://secretsmanager\\.(.+)\\.amazonaws\\.com")),
+    (
+        "servicediscovery",
+        re.compile("https?://servicediscovery\\.(.+)\\.amazonaws\\.com"),
+    ),
     ("ses", re.compile("https?://email\\.(.+)\\.amazonaws\\.com")),
     ("ses", re.compile("https?://ses\\.(.+)\\.amazonaws\\.com")),
     ("sns", re.compile("https?://sns\\.(.+)\\.amazonaws\\.com")),
diff --git a/moto/servicediscovery/__init__.py b/moto/servicediscovery/__init__.py
new file mode 100644
index 000000000..983db1ab4
--- /dev/null
+++ b/moto/servicediscovery/__init__.py
@@ -0,0 +1,5 @@
+"""servicediscovery module initialization; sets value for base decorator."""
+from .models import servicediscovery_backends
+from ..core.models import base_decorator
+
+mock_servicediscovery = base_decorator(servicediscovery_backends)
diff --git a/moto/servicediscovery/exceptions.py b/moto/servicediscovery/exceptions.py
new file mode 100644
index 000000000..f816fcc2c
--- /dev/null
+++ b/moto/servicediscovery/exceptions.py
@@ -0,0 +1,22 @@
+"""Exceptions raised by the servicediscovery service."""
+from moto.core.exceptions import JsonRESTError
+
+
+class OperationNotFound(JsonRESTError):
+    def __init__(self):
+        super().__init__("OperationNotFound", "")
+
+
+class NamespaceNotFound(JsonRESTError):
+    def __init__(self, ns_id):
+        super().__init__("NamespaceNotFound", f"{ns_id}")
+
+
+class ServiceNotFound(JsonRESTError):
+    def __init__(self, ns_id):
+        super().__init__("ServiceNotFound", f"{ns_id}")
+
+
+class ConflictingDomainExists(JsonRESTError):
+    def __init__(self, vpc_id):
+        super().__init__("ConflictingDomainExists", f"{vpc_id}")
diff --git a/moto/servicediscovery/models.py b/moto/servicediscovery/models.py
new file mode 100644
index 000000000..c76c459db
--- /dev/null
+++ b/moto/servicediscovery/models.py
@@ -0,0 +1,330 @@
+import random
+import string
+
+from moto.core import ACCOUNT_ID, BaseBackend, BaseModel
+from moto.core.utils import BackendDict, unix_time
+from moto.utilities.tagging_service import TaggingService
+
+from .exceptions import (
+    ConflictingDomainExists,
+    NamespaceNotFound,
+    OperationNotFound,
+    ServiceNotFound,
+)
+
+
+def random_id(size):
+    return "".join(
+        [random.choice(string.ascii_lowercase + string.digits) for _ in range(size)]
+    )
+
+
+class Namespace(BaseModel):
+    def __init__(
+        self,
+        region,
+        name,
+        ns_type,
+        creator_request_id,
+        description,
+        dns_properties,
+        http_properties,
+        vpc=None,
+    ):
+        super().__init__()
+        self.id = f"ns-{random_id(20)}"
+        self.arn = f"arn:aws:servicediscovery:{region}:{ACCOUNT_ID}:namespace/{self.id}"
+        self.name = name
+        self.type = ns_type
+        self.creator_request_id = creator_request_id
+        self.description = description
+        self.dns_properties = dns_properties
+        self.http_properties = http_properties
+        self.vpc = vpc
+        self.created = unix_time()
+        self.updated = unix_time()
+
+    def to_json(self):
+        return {
+            "Arn": self.arn,
+            "Id": self.id,
+            "Name": self.name,
+            "Description": self.description,
+            "Type": self.type,
+            "Properties": {
+                "DnsProperties": self.dns_properties,
+                "HttpProperties": self.http_properties,
+            },
+            "CreateDate": self.created,
+            "UpdateDate": self.updated,
+            "CreatorRequestId": self.creator_request_id,
+        }
+
+
+class Service(BaseModel):
+    def __init__(
+        self,
+        region,
+        name,
+        namespace_id,
+        description,
+        creator_request_id,
+        dns_config,
+        health_check_config,
+        health_check_custom_config,
+        service_type,
+    ):
+        super().__init__()
+        self.id = f"srv-{random_id(8)}"
+        self.arn = f"arn:aws:servicediscovery:{region}:{ACCOUNT_ID}:service/{self.id}"
+        self.name = name
+        self.namespace_id = namespace_id
+        self.description = description
+        self.creator_request_id = creator_request_id
+        self.dns_config = dns_config
+        self.health_check_config = health_check_config
+        self.health_check_custom_config = health_check_custom_config
+        self.service_type = service_type
+        self.created = unix_time()
+
+    def update(self, details):
+        if "Description" in details:
+            self.description = details["Description"]
+        if "DnsConfig" in details:
+            if self.dns_config is None:
+                self.dns_config = {}
+            self.dns_config["DnsRecords"] = details["DnsConfig"]["DnsRecords"]
+        else:
+            # From the docs:
+            #    If you omit any existing DnsRecords or HealthCheckConfig configurations from an UpdateService request,
+            #    the configurations are deleted from the service.
+            self.dns_config = None
+        if "HealthCheckConfig" in details:
+            self.health_check_config = details["HealthCheckConfig"]
+
+    def to_json(self):
+        return {
+            "Arn": self.arn,
+            "Id": self.id,
+            "Name": self.name,
+            "NamespaceId": self.namespace_id,
+            "CreateDate": self.created,
+            "Description": self.description,
+            "CreatorRequestId": self.creator_request_id,
+            "DnsConfig": self.dns_config,
+            "HealthCheckConfig": self.health_check_config,
+            "HealthCheckCustomConfig": self.health_check_custom_config,
+            "Type": self.service_type,
+        }
+
+
+class Operation(BaseModel):
+    def __init__(self, operation_type, targets):
+        super().__init__()
+        self.id = f"{random_id(32)}-{random_id(8)}"
+        self.status = "SUCCESS"
+        self.operation_type = operation_type
+        self.created = unix_time()
+        self.updated = unix_time()
+        self.targets = targets
+
+    def to_json(self, short=False):
+        if short:
+            return {"Id": self.id, "Status": self.status}
+        else:
+            return {
+                "Id": self.id,
+                "Status": self.status,
+                "Type": self.operation_type,
+                "CreateDate": self.created,
+                "UpdateDate": self.updated,
+                "Targets": self.targets,
+            }
+
+
+class ServiceDiscoveryBackend(BaseBackend):
+    """Implementation of ServiceDiscovery APIs."""
+
+    def __init__(self, region_name=None):
+        self.region_name = region_name
+        self.operations = dict()
+        self.namespaces = dict()
+        self.services = dict()
+        self.tagger = TaggingService()
+
+    def reset(self):
+        """Re-initialize all attributes for this instance."""
+        region_name = self.region_name
+        self.__dict__ = {}
+        self.__init__(region_name)
+
+    def list_namespaces(self):
+        """
+        Pagination or the Filters-parameter is not yet implemented
+        """
+        return self.namespaces.values()
+
+    def create_http_namespace(self, name, creator_request_id, description, tags):
+        namespace = Namespace(
+            region=self.region_name,
+            name=name,
+            ns_type="HTTP",
+            creator_request_id=creator_request_id,
+            description=description,
+            dns_properties={"SOA": {}},
+            http_properties={"HttpName": name},
+        )
+        self.namespaces[namespace.id] = namespace
+        if tags:
+            self.tagger.tag_resource(namespace.arn, tags)
+        operation_id = self._create_operation(
+            "CREATE_NAMESPACE", targets={"NAMESPACE": namespace.id}
+        )
+        return operation_id
+
+    def _create_operation(self, op_type, targets):
+        operation = Operation(operation_type=op_type, targets=targets)
+        self.operations[operation.id] = operation
+        operation_id = operation.id
+        return operation_id
+
+    def delete_namespace(self, namespace_id):
+        if namespace_id not in self.namespaces:
+            raise NamespaceNotFound(namespace_id)
+        del self.namespaces[namespace_id]
+        operation_id = self._create_operation(
+            op_type="DELETE_NAMESPACE", targets={"NAMESPACE": namespace_id}
+        )
+        return operation_id
+
+    def get_namespace(self, namespace_id):
+        if namespace_id not in self.namespaces:
+            raise NamespaceNotFound(namespace_id)
+        return self.namespaces[namespace_id]
+
+    def list_operations(self):
+        """
+        Pagination or the Filters-argument is not yet implemented
+        """
+        # Operations for namespaces will only be listed as long as namespaces exist
+        self.operations = {
+            op_id: op
+            for op_id, op in self.operations.items()
+            if op.targets.get("NAMESPACE") in self.namespaces
+        }
+        return self.operations.values()
+
+    def get_operation(self, operation_id):
+        if operation_id not in self.operations:
+            raise OperationNotFound()
+        return self.operations[operation_id]
+
+    def tag_resource(self, resource_arn, tags):
+        self.tagger.tag_resource(resource_arn, tags)
+
+    def untag_resource(self, resource_arn, tag_keys):
+        self.tagger.untag_resource_using_names(resource_arn, tag_keys)
+
+    def list_tags_for_resource(self, resource_arn):
+        return self.tagger.list_tags_for_resource(resource_arn)
+
+    def create_private_dns_namespace(
+        self, name, creator_request_id, description, vpc, tags, properties
+    ):
+        for namespace in self.namespaces.values():
+            if namespace.vpc == vpc:
+                raise ConflictingDomainExists(vpc)
+        dns_properties = (properties or {}).get("DnsProperties", {})
+        dns_properties["HostedZoneId"] = "hzi"
+        namespace = Namespace(
+            region=self.region_name,
+            name=name,
+            ns_type="DNS_PRIVATE",
+            creator_request_id=creator_request_id,
+            description=description,
+            dns_properties=dns_properties,
+            http_properties={},
+            vpc=vpc,
+        )
+        self.namespaces[namespace.id] = namespace
+        if tags:
+            self.tagger.tag_resource(namespace.arn, tags)
+        operation_id = self._create_operation(
+            "CREATE_NAMESPACE", targets={"NAMESPACE": namespace.id}
+        )
+        return operation_id
+
+    def create_public_dns_namespace(
+        self, name, creator_request_id, description, tags, properties
+    ):
+        dns_properties = (properties or {}).get("DnsProperties", {})
+        dns_properties["HostedZoneId"] = "hzi"
+        namespace = Namespace(
+            region=self.region_name,
+            name=name,
+            ns_type="DNS_PUBLIC",
+            creator_request_id=creator_request_id,
+            description=description,
+            dns_properties=dns_properties,
+            http_properties={},
+        )
+        self.namespaces[namespace.id] = namespace
+        if tags:
+            self.tagger.tag_resource(namespace.arn, tags)
+        operation_id = self._create_operation(
+            "CREATE_NAMESPACE", targets={"NAMESPACE": namespace.id}
+        )
+        return operation_id
+
+    def create_service(
+        self,
+        name,
+        namespace_id,
+        creator_request_id,
+        description,
+        dns_config,
+        health_check_config,
+        health_check_custom_config,
+        tags,
+        service_type,
+    ):
+        service = Service(
+            region=self.region_name,
+            name=name,
+            namespace_id=namespace_id,
+            description=description,
+            creator_request_id=creator_request_id,
+            dns_config=dns_config,
+            health_check_config=health_check_config,
+            health_check_custom_config=health_check_custom_config,
+            service_type=service_type,
+        )
+        self.services[service.id] = service
+        if tags:
+            self.tagger.tag_resource(service.arn, tags)
+        return service
+
+    def get_service(self, service_id):
+        if service_id not in self.services:
+            raise ServiceNotFound(service_id)
+        return self.services[service_id]
+
+    def delete_service(self, service_id):
+        self.services.pop(service_id, None)
+
+    def list_services(self):
+        """
+        Pagination or the Filters-argument is not yet implemented
+        """
+        return self.services.values()
+
+    def update_service(self, service_id, details):
+        service = self.get_service(service_id)
+        service.update(details=details)
+        operation_id = self._create_operation(
+            "UPDATE_SERVICE", targets={"SEVICE": service.id}
+        )
+        return operation_id
+
+
+servicediscovery_backends = BackendDict(ServiceDiscoveryBackend, "servicediscovery")
diff --git a/moto/servicediscovery/responses.py b/moto/servicediscovery/responses.py
new file mode 100644
index 000000000..38873294c
--- /dev/null
+++ b/moto/servicediscovery/responses.py
@@ -0,0 +1,171 @@
+"""Handles incoming servicediscovery requests, invokes methods, returns responses."""
+import json
+
+from moto.core.responses import BaseResponse
+from .models import servicediscovery_backends
+
+
+class ServiceDiscoveryResponse(BaseResponse):
+    @property
+    def servicediscovery_backend(self):
+        """Return backend instance specific for this region."""
+        return servicediscovery_backends[self.region]
+
+    def list_namespaces(self):
+        namespaces = self.servicediscovery_backend.list_namespaces()
+        return 200, {}, json.dumps({"Namespaces": [ns.to_json() for ns in namespaces]})
+
+    def create_http_namespace(self):
+        params = json.loads(self.body)
+        name = params.get("Name")
+        creator_request_id = params.get("CreatorRequestId")
+        description = params.get("Description")
+        tags = params.get("Tags")
+        operation_id = self.servicediscovery_backend.create_http_namespace(
+            name=name,
+            creator_request_id=creator_request_id,
+            description=description,
+            tags=tags,
+        )
+        return json.dumps(dict(OperationId=operation_id))
+
+    def delete_namespace(self):
+        params = json.loads(self.body)
+        namespace_id = params.get("Id")
+        operation_id = self.servicediscovery_backend.delete_namespace(
+            namespace_id=namespace_id,
+        )
+        return json.dumps(dict(OperationId=operation_id))
+
+    def list_operations(self):
+        operations = self.servicediscovery_backend.list_operations()
+        return (
+            200,
+            {},
+            json.dumps({"Operations": [o.to_json(short=True) for o in operations]}),
+        )
+
+    def get_operation(self):
+        params = json.loads(self.body)
+        operation_id = params.get("OperationId")
+        operation = self.servicediscovery_backend.get_operation(
+            operation_id=operation_id,
+        )
+        return json.dumps(dict(Operation=operation.to_json()))
+
+    def get_namespace(self):
+        params = json.loads(self.body)
+        namespace_id = params.get("Id")
+        namespace = self.servicediscovery_backend.get_namespace(
+            namespace_id=namespace_id,
+        )
+        return json.dumps(dict(Namespace=namespace.to_json()))
+
+    def tag_resource(self):
+        params = json.loads(self.body)
+        resource_arn = params.get("ResourceARN")
+        tags = params.get("Tags")
+        self.servicediscovery_backend.tag_resource(
+            resource_arn=resource_arn, tags=tags,
+        )
+        return json.dumps(dict())
+
+    def untag_resource(self):
+        params = json.loads(self.body)
+        resource_arn = params.get("ResourceARN")
+        tag_keys = params.get("TagKeys")
+        self.servicediscovery_backend.untag_resource(
+            resource_arn=resource_arn, tag_keys=tag_keys,
+        )
+        return json.dumps(dict())
+
+    def list_tags_for_resource(self):
+        params = json.loads(self.body)
+        resource_arn = params.get("ResourceARN")
+        tags = self.servicediscovery_backend.list_tags_for_resource(
+            resource_arn=resource_arn,
+        )
+        return 200, {}, json.dumps(tags)
+
+    def create_private_dns_namespace(self):
+        params = json.loads(self.body)
+        name = params.get("Name")
+        creator_request_id = params.get("CreatorRequestId")
+        description = params.get("Description")
+        vpc = params.get("Vpc")
+        tags = params.get("Tags")
+        properties = params.get("Properties")
+        operation_id = self.servicediscovery_backend.create_private_dns_namespace(
+            name=name,
+            creator_request_id=creator_request_id,
+            description=description,
+            vpc=vpc,
+            tags=tags,
+            properties=properties,
+        )
+        return json.dumps(dict(OperationId=operation_id))
+
+    def create_public_dns_namespace(self):
+        params = json.loads(self.body)
+        name = params.get("Name")
+        creator_request_id = params.get("CreatorRequestId")
+        description = params.get("Description")
+        tags = params.get("Tags")
+        properties = params.get("Properties")
+        operation_id = self.servicediscovery_backend.create_public_dns_namespace(
+            name=name,
+            creator_request_id=creator_request_id,
+            description=description,
+            tags=tags,
+            properties=properties,
+        )
+        return json.dumps(dict(OperationId=operation_id))
+
+    def create_service(self):
+        params = json.loads(self.body)
+        name = params.get("Name")
+        namespace_id = params.get("NamespaceId")
+        creator_request_id = params.get("CreatorRequestId")
+        description = params.get("Description")
+        dns_config = params.get("DnsConfig")
+        health_check_config = params.get("HealthCheckConfig")
+        health_check_custom_config = params.get("HealthCheckCustomConfig")
+        tags = params.get("Tags")
+        service_type = params.get("Type")
+        service = self.servicediscovery_backend.create_service(
+            name=name,
+            namespace_id=namespace_id,
+            creator_request_id=creator_request_id,
+            description=description,
+            dns_config=dns_config,
+            health_check_config=health_check_config,
+            health_check_custom_config=health_check_custom_config,
+            tags=tags,
+            service_type=service_type,
+        )
+        return json.dumps(dict(Service=service.to_json()))
+
+    def get_service(self):
+        params = json.loads(self.body)
+        service_id = params.get("Id")
+        service = self.servicediscovery_backend.get_service(service_id=service_id)
+        return json.dumps(dict(Service=service.to_json()))
+
+    def delete_service(self):
+        params = json.loads(self.body)
+        service_id = params.get("Id")
+        self.servicediscovery_backend.delete_service(service_id=service_id)
+        return json.dumps(dict())
+
+    def list_services(self):
+        services = self.servicediscovery_backend.list_services()
+        return json.dumps(dict(Services=[s.to_json() for s in services]))
+
+    def update_service(self):
+        params = json.loads(self.body)
+        service_id = params.get("Id")
+        details = params.get("Service")
+        operation_id = self.servicediscovery_backend.update_service(
+            service_id=service_id, details=details,
+        )
+        return json.dumps(dict(OperationId=operation_id))
diff --git a/moto/servicediscovery/urls.py b/moto/servicediscovery/urls.py
new file mode 100644
index 000000000..53e1b0ffb
--- /dev/null
+++ b/moto/servicediscovery/urls.py
@@ -0,0 +1,11 @@
+"""servicediscovery base URL and path."""
+from .responses import ServiceDiscoveryResponse
+
+url_bases = [
+    r"https?://servicediscovery\.(.+)\.amazonaws\.com",
+]
+
+
+url_paths = {
+    "{0}/$": ServiceDiscoveryResponse.dispatch,
+}
diff --git a/tests/terraform-tests.success.txt b/tests/terraform-tests.success.txt
index 9e98761e0..a5865a903 100644
--- a/tests/terraform-tests.success.txt
+++ b/tests/terraform-tests.success.txt
@@ -85,6 +85,7 @@ TestAccAWSRedshiftServiceAccount
 TestAccAWSRolePolicyAttachment
 TestAccAWSSNSSMSPreferences
 TestAccAWSSageMakerPrebuiltECRImage
+TestAccAWSServiceDiscovery
 TestAccAWSSQSQueuePolicy
 TestAccAWSSSMDocument
 TestValidateSSMDocumentPermissions
diff --git a/tests/test_servicediscovery/__init__.py b/tests/test_servicediscovery/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/test_servicediscovery/test_server.py b/tests/test_servicediscovery/test_server.py
new file mode 100644
index 000000000..8967f11ba
--- /dev/null
+++ b/tests/test_servicediscovery/test_server.py
@@ -0,0 +1,15 @@
+import json
+import sure  # noqa # pylint: disable=unused-import
+
+import moto.server as server
+
+
+def test_servicediscovery_list():
+    backend = server.create_backend_app("servicediscovery")
+    test_client = backend.test_client()
+
+    headers = {"X-Amz-Target": "Route53AutoNaming_v20170314.ListNamespaces"}
+
+    resp = test_client.get("/", headers=headers)
+    resp.status_code.should.equal(200)
+    json.loads(resp.data).should.equal({"Namespaces": []})
diff --git a/tests/test_servicediscovery/test_servicediscovery_httpnamespaces.py b/tests/test_servicediscovery/test_servicediscovery_httpnamespaces.py
new file mode 100644
index 000000000..97998c2ea
--- /dev/null
+++ b/tests/test_servicediscovery/test_servicediscovery_httpnamespaces.py
@@ -0,0 +1,233 @@
+"""Unit tests for servicediscovery-supported APIs."""
+import boto3
+import pytest
+import sure  # noqa # pylint: disable=unused-import
+
+from botocore.exceptions import ClientError
+from moto import mock_servicediscovery
+from moto.core import ACCOUNT_ID
+
+# See our Development Tips on writing tests for hints on how to write good tests:
+# http://docs.getmoto.org/en/latest/docs/contributing/development_tips/tests.html
+
+
+@mock_servicediscovery
+def test_create_http_namespace():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_http_namespace(Name="mynamespace")
+
+    resp = client.list_namespaces()
+    resp.should.have.key("Namespaces").length_of(1)
+
+    namespace = resp["Namespaces"][0]
+    namespace.should.have.key("Id").match("ns-[a-z0-9]{16}")
+    namespace.should.have.key("Arn").match(
+        f"arn:aws:servicediscovery:eu-west-1:{ACCOUNT_ID}:namespace/{namespace['Id']}"
+    )
+    namespace.should.have.key("Name").equals("mynamespace")
+    namespace.should.have.key("Type").equals("HTTP")
+    namespace.should.have.key("CreateDate")
+
+    namespace.should.have.key("Properties")
+    props = namespace["Properties"]
+    props.should.have.key("DnsProperties").equals({"SOA": {}})
+    props.should.have.key("HttpProperties").equals({"HttpName": "mynamespace"})
+
+
+@mock_servicediscovery
+def test_get_http_namespace_minimal():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_http_namespace(Name="mynamespace")
+
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.get_namespace(Id=ns_id)
+    resp.should.have.key("Namespace")
+
+    namespace = resp["Namespace"]
+    namespace.should.have.key("Id").match(ns_id)
+    namespace.should.have.key("Arn").match(
+        f"arn:aws:servicediscovery:eu-west-1:{ACCOUNT_ID}:namespace/{namespace['Id']}"
+    )
+    namespace.should.have.key("Name").equals("mynamespace")
+    namespace.should.have.key("Type").equals("HTTP")
+    namespace.should.have.key("CreateDate")
+    namespace.should.have.key("CreatorRequestId")
+
+    namespace.should.have.key("Properties")
+    props = namespace["Properties"]
+    props.should.have.key("DnsProperties").equals({"SOA": {}})
+    props.should.have.key("HttpProperties").equals({"HttpName": "mynamespace"})
+
+    namespace.shouldnt.have.key("Description")
+
+
+@mock_servicediscovery
+def test_get_http_namespace():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_http_namespace(
+        Name="mynamespace", CreatorRequestId="crid", Description="mu fancy namespace"
+    )
+
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.get_namespace(Id=ns_id)
+    resp.should.have.key("Namespace")
+
+    namespace = resp["Namespace"]
+    namespace.should.have.key("Id").match(ns_id)
+    namespace.should.have.key("Arn").match(
+        f"arn:aws:servicediscovery:eu-west-1:{ACCOUNT_ID}:namespace/{namespace['Id']}"
+    )
+    namespace.should.have.key("Name").equals("mynamespace")
+    namespace.should.have.key("Type").equals("HTTP")
+    namespace.should.have.key("CreateDate")
+    namespace.should.have.key("CreatorRequestId").equals("crid")
+    namespace.should.have.key("Description").equals("mu fancy namespace")
+
+    namespace.should.have.key("Properties")
+    props = namespace["Properties"]
+    props.should.have.key("DnsProperties").equals({"SOA": {}})
+    props.should.have.key("HttpProperties").equals({"HttpName": "mynamespace"})
+
+
+@mock_servicediscovery
+def test_delete_namespace():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_http_namespace(Name="mynamespace")
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.delete_namespace(Id=ns_id)
+    resp.should.have.key("OperationId")
+
+    # Calling delete again while this is in progress results in an error:
+    #    Another operation of type DeleteNamespace and id dlmpkcn33aovnztwdpsdplgtheuhgcap-k6x64euq is in progress
+    # list_operations is empty after successfull deletion - old operations from this namespace should be deleted
+    # list_namespaces is also empty (obvs)
+
+    client.list_namespaces()["Namespaces"].should.equal([])
+    client.list_operations()["Operations"].should.equal([])
+
+
+@mock_servicediscovery
+def test_delete_unknown_namespace():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    with pytest.raises(ClientError) as exc:
+        client.delete_namespace(Id="unknown")
+    err = exc.value.response["Error"]
+    err["Code"].should.equal("NamespaceNotFound")
+    err["Message"].should.equal("unknown")
+
+
+@mock_servicediscovery
+def test_get_unknown_namespace():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    with pytest.raises(ClientError) as exc:
+        client.get_namespace(Id="unknown")
+    err = exc.value.response["Error"]
+    err["Code"].should.equal("NamespaceNotFound")
+    err["Message"].should.equal("unknown")
+
+
+@mock_servicediscovery
+def test_create_private_dns_namespace_minimal():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_private_dns_namespace(Name="dns_ns", Vpc="vpc_id")
+
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.get_namespace(Id=ns_id)
+    resp.should.have.key("Namespace")
+
+    namespace = resp["Namespace"]
+    namespace.should.have.key("Id").match(ns_id)
+    namespace.should.have.key("Name").equals("dns_ns")
+    namespace.should.have.key("Type").equals("DNS_PRIVATE")
+
+    namespace.should.have.key("Properties")
+    props = namespace["Properties"]
+    props.should.have.key("DnsProperties")
+    props["DnsProperties"].should.have.key("HostedZoneId")
+    props["DnsProperties"].shouldnt.have.key("SOA")
+
+
+@mock_servicediscovery
+def test_create_private_dns_namespace():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_private_dns_namespace(
+        Name="dns_ns",
+        Vpc="vpc_id",
+        Description="my private dns",
+        Properties={"DnsProperties": {"SOA": {"TTL": 123}}},
+    )
+
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.get_namespace(Id=ns_id)
+    resp.should.have.key("Namespace")
+
+    namespace = resp["Namespace"]
+    namespace.should.have.key("Id").match(ns_id)
+    namespace.should.have.key("Name").equals("dns_ns")
+    namespace.should.have.key("Type").equals("DNS_PRIVATE")
+    namespace.should.have.key("Description").equals("my private dns")
+
+    namespace.should.have.key("Properties")
+    props = namespace["Properties"]
+    props.should.have.key("DnsProperties")
+    props["DnsProperties"].should.have.key("HostedZoneId")
+    props["DnsProperties"].should.have.key("SOA").equals({"TTL": 123})
+
+
+@mock_servicediscovery
+def test_create_private_dns_namespace_with_duplicate_vpc():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_private_dns_namespace(Name="dns_ns", Vpc="vpc_id")
+
+    with pytest.raises(ClientError) as exc:
+        client.create_private_dns_namespace(Name="sth else", Vpc="vpc_id")
+    err = exc.value.response["Error"]
+    err["Code"].should.equal("ConflictingDomainExists")
+
+
+@mock_servicediscovery
+def test_create_public_dns_namespace_minimal():
+    client = boto3.client("servicediscovery", region_name="us-east-2")
+    client.create_public_dns_namespace(Name="public_dns_ns")
+
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.get_namespace(Id=ns_id)
+    resp.should.have.key("Namespace")
+
+    namespace = resp["Namespace"]
+    namespace.should.have.key("Id").match(ns_id)
+    namespace.should.have.key("Name").equals("public_dns_ns")
+    namespace.should.have.key("Type").equals("DNS_PUBLIC")
+
+
+@mock_servicediscovery
+def test_create_public_dns_namespace():
+    client = boto3.client("servicediscovery", region_name="us-east-2")
+    client.create_public_dns_namespace(
+        Name="public_dns_ns",
+        CreatorRequestId="cri",
+        Description="my public dns",
+        Properties={"DnsProperties": {"SOA": {"TTL": 124}}},
+    )
+
+    ns_id = client.list_namespaces()["Namespaces"][0]["Id"]
+
+    resp = client.get_namespace(Id=ns_id)
+    resp.should.have.key("Namespace")
+
+    namespace = resp["Namespace"]
+    namespace.should.have.key("Id").match(ns_id)
+    namespace.should.have.key("Name").equals("public_dns_ns")
+    namespace.should.have.key("Type").equals("DNS_PUBLIC")
+    namespace.should.have.key("Description").equals("my public dns")
+    namespace.should.have.key("CreatorRequestId").equals("cri")
+
+    namespace.should.have.key("Properties").should.have.key("DnsProperties")
+    dns_props = namespace["Properties"]["DnsProperties"]
+    dns_props.should.equal({"HostedZoneId": "hzi", "SOA": {"TTL": 124}})
diff --git a/tests/test_servicediscovery/test_servicediscovery_operations.py b/tests/test_servicediscovery/test_servicediscovery_operations.py
new file mode 100644
index 000000000..f42dce14b
--- /dev/null
+++ b/tests/test_servicediscovery/test_servicediscovery_operations.py
@@ -0,0 +1,135 @@
+"""Unit tests for servicediscovery-supported APIs."""
+import boto3
+import pytest
+import sure  # noqa # pylint: disable=unused-import
+
+from botocore.exceptions import ClientError
+from moto import mock_servicediscovery
+
+# See our Development Tips on writing tests for hints on how to write good tests:
+# http://docs.getmoto.org/en/latest/docs/contributing/development_tips/tests.html
+
+
+@mock_servicediscovery
+def test_list_operations_initial():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    resp = client.list_operations()
+
+    resp.should.have.key("Operations").equals([])
+
+
+@mock_servicediscovery
+def test_list_operations():
+    client = boto3.client("servicediscovery", region_name="eu-west-2")
+
+    resp = client.create_http_namespace(Name="n/a")
+    resp.should.have.key("OperationId")
+    op_id = resp["OperationId"]
+
+    resp = client.list_operations()
+    resp.should.have.key("Operations").length_of(1)
+    resp["Operations"].should.equal([{"Id": op_id, "Status": "SUCCESS"}])
+
+
+@mock_servicediscovery
+def test_get_create_http_namespace_operation():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    resp = client.create_http_namespace(Name="mynamespace")
+
+    resp["OperationId"].should.match("[a-z0-9]{32}-[a-z0-9]{8}")
+
+    operation_id = resp["OperationId"]
+
+    resp = client.get_operation(OperationId=operation_id)
+
+    resp.should.have.key("Operation")
+    operation = resp["Operation"]
+    operation.should.have.key("Id").equals(operation_id)
+    operation.should.have.key("Type").equals("CREATE_NAMESPACE")
+    operation.should.have.key("Status").equals("SUCCESS")
+    operation.should.have.key("CreateDate")
+    operation.should.have.key("UpdateDate")
+    operation.should.have.key("Targets")
+
+    targets = operation["Targets"]
+    targets.should.have.key("NAMESPACE")
+
+    namespaces = client.list_namespaces()["Namespaces"]
+    [ns["Id"] for ns in namespaces].should.contain(targets["NAMESPACE"])
+
+
+@mock_servicediscovery
+def test_get_private_dns_namespace_operation():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    resp = client.create_private_dns_namespace(Name="dns_ns", Vpc="vpc_id")
+
+    resp["OperationId"].should.match("[a-z0-9]{32}-[a-z0-9]{8}")
+
+    operation_id = resp["OperationId"]
+
+    resp = client.get_operation(OperationId=operation_id)
+
+    resp.should.have.key("Operation")
+    operation = resp["Operation"]
+    operation.should.have.key("Id").equals(operation_id)
+    operation.should.have.key("Type").equals("CREATE_NAMESPACE")
+    operation.should.have.key("Status").equals("SUCCESS")
+    operation.should.have.key("CreateDate")
+    operation.should.have.key("UpdateDate")
+    operation.should.have.key("Targets")
+
+
+@mock_servicediscovery
+def test_get_public_dns_namespace_operation():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    resp = client.create_public_dns_namespace(Name="dns_ns")
+
+    resp["OperationId"].should.match("[a-z0-9]{32}-[a-z0-9]{8}")
+
+    operation_id = resp["OperationId"]
+
+    resp = client.get_operation(OperationId=operation_id)
+
+    resp.should.have.key("Operation")
+    operation = resp["Operation"]
+    operation.should.have.key("Id").equals(operation_id)
+    operation.should.have.key("Type").equals("CREATE_NAMESPACE")
+    operation.should.have.key("Status").equals("SUCCESS")
+    operation.should.have.key("CreateDate")
+    operation.should.have.key("UpdateDate")
+    operation.should.have.key("Targets")
+
+
+@mock_servicediscovery
+def test_get_update_service_operation():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    service_id = client.create_service(
+        Name="my service", NamespaceId="ns_id", Description="first desc",
+    )["Service"]["Id"]
+
+    resp = client.update_service(Id=service_id, Service={"Description": "updated desc"})
+
+    resp["OperationId"].should.match("[a-z0-9]{32}-[a-z0-9]{8}")
+
+    operation_id = resp["OperationId"]
+
+    resp = client.get_operation(OperationId=operation_id)
+
+    resp.should.have.key("Operation")
+    operation = resp["Operation"]
+    operation.should.have.key("Id").equals(operation_id)
+    operation.should.have.key("Type").equals("UPDATE_SERVICE")
+    operation.should.have.key("Status").equals("SUCCESS")
+    operation.should.have.key("CreateDate")
+    operation.should.have.key("UpdateDate")
+    operation.should.have.key("Targets")
+
+
+@mock_servicediscovery
+def test_get_unknown_operation():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+
+    with pytest.raises(ClientError) as exc:
+        client.get_operation(OperationId="unknown")
+    err = exc.value.response["Error"]
+    err["Code"].should.equal("OperationNotFound")
diff --git a/tests/test_servicediscovery/test_servicediscovery_service.py b/tests/test_servicediscovery/test_servicediscovery_service.py
new file mode 100644
index 000000000..66f1c943b
--- /dev/null
+++ b/tests/test_servicediscovery/test_servicediscovery_service.py
@@ -0,0 +1,208 @@
+"""Unit tests for servicediscovery-supported APIs."""
+import boto3
+import pytest
+import sure  # noqa # pylint: disable=unused-import
+
+from botocore.exceptions import ClientError
+from moto import mock_servicediscovery
+
+# See our Development Tips on writing tests for hints on how to write good tests:
+# http://docs.getmoto.org/en/latest/docs/contributing/development_tips/tests.html
+
+
+@mock_servicediscovery
+def test_create_service_minimal():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+    operation_id = client.create_http_namespace(Name="mynamespace")["OperationId"]
+    namespace_id = client.get_operation(OperationId=operation_id)["Operation"][
+        "Targets"
+    ]["NAMESPACE"]
+
+    resp = client.create_service(Name="my service", NamespaceId=namespace_id)
+
+    resp.should.have.key("Service")
+    resp["Service"].should.have.key("Id")
+    resp["Service"].should.have.key("Arn")
+    resp["Service"].should.have.key("Name").equals("my service")
+    resp["Service"].should.have.key("NamespaceId").equals(namespace_id)
+    resp["Service"].should.have.key("CreateDate")
+
+
+@mock_servicediscovery
+def test_create_service():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+    operation_id = client.create_http_namespace(Name="mynamespace")["OperationId"]
+    namespace_id = client.get_operation(OperationId=operation_id)["Operation"][
+        "Targets"
+    ]["NAMESPACE"]
+
+    resp = client.create_service(
+        Name="my service",
+        CreatorRequestId="crid",
+        Description="my service",
+        DnsConfig={
+            "NamespaceId": namespace_id,
+            "RoutingPolicy": "WEIGHTED",
+            "DnsRecords": [{"Type": "SRV", "TTL": 0}],
+        },
+        HealthCheckConfig={"Type": "TCP", "ResourcePath": "/sth"},
+        HealthCheckCustomConfig={"FailureThreshold": 125},
+        Type="HTTP",
+    )
+
+    resp.should.have.key("Service")
+    resp["Service"].should.have.key("Id")
+    resp["Service"].should.have.key("Arn")
+    resp["Service"].should.have.key("Name").equals("my service")
+    resp["Service"].shouldnt.have.key("NamespaceId")
+    resp["Service"].should.have.key("Description").equals("my service")
+    resp["Service"].should.have.key("DnsConfig").equals(
+        {
+            "NamespaceId": namespace_id,
+            "RoutingPolicy": "WEIGHTED",
+            "DnsRecords": [{"Type": "SRV", "TTL": 0}],
+        }
+    )
+    resp["Service"].should.have.key("HealthCheckConfig").equals(
+        {"Type": "TCP", "ResourcePath": "/sth"}
+    )
+    resp["Service"].should.have.key("HealthCheckCustomConfig").equals(
+        {"FailureThreshold": 125}
+    )
+    resp["Service"].should.have.key("Type").equals("HTTP")
+    resp["Service"].should.have.key("CreatorRequestId").equals("crid")
+
+
+@mock_servicediscovery
+def test_get_service():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+
+    operation_id = client.create_http_namespace(Name="mynamespace")["OperationId"]
+    namespace_id = client.get_operation(OperationId=operation_id)["Operation"][
+        "Targets"
+    ]["NAMESPACE"]
+
+    service_id = client.create_service(Name="my service", NamespaceId=namespace_id)[
+        "Service"
+    ]["Id"]
+
+    resp = client.get_service(Id=service_id)
+
+    resp.should.have.key("Service")
+    resp["Service"].should.have.key("Id")
+    resp["Service"].should.have.key("Arn")
+    resp["Service"].should.have.key("Name").equals("my service")
+    resp["Service"].should.have.key("NamespaceId").equals(namespace_id)
+
+
+@mock_servicediscovery
+def test_get_unknown_service():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+
+    with pytest.raises(ClientError) as exc:
+        client.get_service(Id="unknown")
+    err = exc.value.response["Error"]
+    err["Code"].should.equal("ServiceNotFound")
+    err["Message"].should.equal("unknown")
+
+
+@mock_servicediscovery
+def test_delete_service():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+
+    operation_id = client.create_http_namespace(Name="mynamespace")["OperationId"]
+    namespace_id = client.get_operation(OperationId=operation_id)["Operation"][
+        "Targets"
+    ]["NAMESPACE"]
+    service_id = client.create_service(Name="my service", NamespaceId=namespace_id)[
+        "Service"
+    ]["Id"]
+
+    client.delete_service(Id=service_id)
+
+    with pytest.raises(ClientError) as exc:
+        client.get_service(Id=service_id)
+    err = exc.value.response["Error"]
+    err["Code"].should.equal("ServiceNotFound")
+    err["Message"].should.equal(service_id)
+
+
+@mock_servicediscovery
+def test_update_service_description():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+    operation_id = client.create_http_namespace(Name="mynamespace")["OperationId"]
+    namespace_id = client.get_operation(OperationId=operation_id)["Operation"][
+        "Targets"
+    ]["NAMESPACE"]
+
+    service_id = client.create_service(
+        Name="my service",
+        NamespaceId=namespace_id,
+        Description="first desc",
+        DnsConfig={
+            "NamespaceId": namespace_id,
+            "RoutingPolicy": "WEIGHTED",
+            "DnsRecords": [{"Type": "SRV", "TTL": 0}],
+        },
+        HealthCheckConfig={"Type": "TCP", "ResourcePath": "/sth"},
+    )["Service"]["Id"]
+
+    client.update_service(Id=service_id, Service={"Description": "updated desc"})
+
+    resp = client.get_service(Id=service_id)
+
+    resp.should.have.key("Service")
+    resp["Service"].should.have.key("Id").equals(service_id)
+    resp["Service"].should.have.key("Arn")
+    resp["Service"].should.have.key("Name").equals("my service")
+    resp["Service"].should.have.key("NamespaceId").equals(namespace_id)
+    resp["Service"].should.have.key("Description").equals("updated desc")
+    # From the docs:
+    #    If you omit any existing DnsRecords or HealthCheckConfig configurations from an UpdateService request,
+    #    the configurations are deleted from the service.
+    resp["Service"].shouldnt.have.key("DnsConfig")
+    resp["Service"].should.have.key("HealthCheckConfig").equals(
+        {"Type": "TCP", "ResourcePath": "/sth"}
+    )
+
+
+@mock_servicediscovery
+def test_update_service_others():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+    operation_id = client.create_http_namespace(Name="mynamespace")["OperationId"]
+    namespace_id = client.get_operation(OperationId=operation_id)["Operation"][
+        "Targets"
+    ]["NAMESPACE"]
+
+    service_id = client.create_service(
+        Name="my service",
+        NamespaceId=namespace_id,
+        Description="first desc",
+        DnsConfig={
+            "RoutingPolicy": "WEIGHTED",
+            "DnsRecords": [{"Type": "SRV", "TTL": 0}],
+        },
+    )["Service"]["Id"]
+
+    client.update_service(
+        Id=service_id,
+        Service={
+            "DnsConfig": {"DnsRecords": [{"Type": "SRV", "TTL": 12}]},
+            "HealthCheckConfig": {"Type": "TCP", "ResourcePath": "/sth"},
+        },
+    )
+
+    resp = client.get_service(Id=service_id)
+
+    resp.should.have.key("Service")
+    resp["Service"].should.have.key("Id").equals(service_id)
+    resp["Service"].should.have.key("Arn")
+    resp["Service"].should.have.key("Name").equals("my service")
+    resp["Service"].should.have.key("NamespaceId").equals(namespace_id)
+    resp["Service"].should.have.key("Description").equals("first desc")
+    resp["Service"].should.have.key("DnsConfig").equals(
+        {"RoutingPolicy": "WEIGHTED", "DnsRecords": [{"Type": "SRV", "TTL": 12}]}
+    )
+    resp["Service"].should.have.key("HealthCheckConfig").equals(
+        {"Type": "TCP", "ResourcePath": "/sth"}
+    )
diff --git a/tests/test_servicediscovery/test_servicediscovery_tags.py b/tests/test_servicediscovery/test_servicediscovery_tags.py
new file mode 100644
index 000000000..1f11e26fd
--- /dev/null
+++ b/tests/test_servicediscovery/test_servicediscovery_tags.py
@@ -0,0 +1,103 @@
+"""Unit tests for servicediscovery-supported APIs."""
+import boto3
+
+import sure  # noqa # pylint: disable=unused-import
+from moto import mock_servicediscovery
+
+# See our Development Tips on writing tests for hints on how to write good tests:
+# http://docs.getmoto.org/en/latest/docs/contributing/development_tips/tests.html
+
+
+@mock_servicediscovery
+def test_create_http_namespace_with_tags():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_http_namespace(
+        Name="mynamespace", Tags=[{"Key": "key1", "Value": "val1"}]
+    )
+
+    ns_arn = client.list_namespaces()["Namespaces"][0]["Arn"]
+
+    resp = client.list_tags_for_resource(ResourceARN=ns_arn)
+    resp.should.have.key("Tags")
+
+    resp["Tags"].should.equal([{"Key": "key1", "Value": "val1"}])
+
+
+@mock_servicediscovery
+def test_create_public_dns_namespace_with_tags():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_public_dns_namespace(
+        Name="mynamespace", Tags=[{"Key": "key1", "Value": "val1"}]
+    )
+
+    ns_arn = client.list_namespaces()["Namespaces"][0]["Arn"]
+
+    resp = client.list_tags_for_resource(ResourceARN=ns_arn)
+    resp.should.have.key("Tags")
+
+    resp["Tags"].should.equal([{"Key": "key1", "Value": "val1"}])
+
+
+@mock_servicediscovery
+def test_create_private_dns_namespace_with_tags():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_private_dns_namespace(
+        Name="mynamespace", Vpc="vpc", Tags=[{"Key": "key1", "Value": "val1"}]
+    )
+
+    ns_arn = client.list_namespaces()["Namespaces"][0]["Arn"]
+
+    resp = client.list_tags_for_resource(ResourceARN=ns_arn)
+    resp.should.have.key("Tags")
+
+    resp["Tags"].should.equal([{"Key": "key1", "Value": "val1"}])
+
+
+@mock_servicediscovery
+def test_create_service_with_tags():
+    client = boto3.client("servicediscovery", region_name="eu-west-1")
+    client.create_service(Name="myservice", Tags=[{"Key": "key1", "Value": "val1"}])
+
+    ns_arn = client.list_services()["Services"][0]["Arn"]
+
+    resp = client.list_tags_for_resource(ResourceARN=ns_arn)
+    resp.should.have.key("Tags")
+
+    resp["Tags"].should.equal([{"Key": "key1", "Value": "val1"}])
+
+
+@mock_servicediscovery
+def test_tag_resource():
+    client = boto3.client("servicediscovery", region_name="ap-southeast-1")
+    client.create_http_namespace(
+        Name="mynamespace", Tags=[{"Key": "key1", "Value": "val1"}]
+    )
+
+    ns_arn = client.list_namespaces()["Namespaces"][0]["Arn"]
+    client.tag_resource(ResourceARN=ns_arn, Tags=[{"Key": "key2", "Value": "val2"}])
+
+    resp = client.list_tags_for_resource(ResourceARN=ns_arn)
+    resp.should.have.key("Tags")
+
+    resp["Tags"].should.equal(
+        [{"Key": "key1", "Value": "val1"}, {"Key": "key2", "Value": "val2"}]
+    )
+
+
+@mock_servicediscovery
+def test_untag_resource():
+    client = boto3.client("servicediscovery", region_name="us-east-2")
+    client.create_http_namespace(Name="mynamespace")
+
+    ns_arn = client.list_namespaces()["Namespaces"][0]["Arn"]
+    client.tag_resource(
+        ResourceARN=ns_arn,
+        Tags=[{"Key": "key1", "Value": "val1"}, {"Key": "key2", "Value": "val2"}],
+    )
+
+    client.untag_resource(ResourceARN=ns_arn, TagKeys=["key1"])
+
+    resp = client.list_tags_for_resource(ResourceARN=ns_arn)
+    resp.should.have.key("Tags")
+
+    resp["Tags"].should.equal([{"Key": "key2", "Value": "val2"}])