diff --git a/pytest.ini b/pytest.ini
index c7e0418..73d1563 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -34,7 +34,7 @@ markers =
     s3website
     s3website_routing_rules
     s3website_redirect_location
-    3website
+    sns
     sse_s3
     storage_class
     tagging
diff --git a/s3tests_boto3/functional/test_sns.py b/s3tests_boto3/functional/test_sns.py
new file mode 100644
index 0000000..360f14e
--- /dev/null
+++ b/s3tests_boto3/functional/test_sns.py
@@ -0,0 +1,159 @@
+import json
+import pytest
+from botocore.exceptions import ClientError
+from . import (
+    configfile,
+    get_iam_root_client,
+    get_iam_alt_root_client,
+    get_new_bucket_name,
+    get_prefix,
+    nuke_prefixed_buckets,
+)
+from .iam import iam_root, iam_alt_root
+from .utils import assert_raises, _get_status_and_error_code
+
+def get_new_topic_name():
+    return get_new_bucket_name()
+
+def nuke_topics(client, prefix):
+    p = client.get_paginator('list_topics')
+    for response in p.paginate():
+        for topic in response['Topics']:
+            arn = topic['TopicArn']
+            if prefix not in arn:
+                pass
+            try:
+                client.delete_topic(TopicArn=arn)
+            except:
+                pass
+
+@pytest.fixture
+def sns(iam_root):
+    client = get_iam_root_client(service_name='sns')
+    yield client
+    nuke_topics(client, get_prefix())
+
+@pytest.fixture
+def sns_alt(iam_alt_root):
+    client = get_iam_alt_root_client(service_name='sns')
+    yield client
+    nuke_topics(client, get_prefix())
+
+@pytest.fixture
+def s3(iam_root):
+    client = get_iam_root_client(service_name='s3')
+    yield client
+    nuke_prefixed_buckets(get_prefix(), client)
+
+@pytest.fixture
+def s3_alt(iam_alt_root):
+    client = get_iam_alt_root_client(service_name='s3')
+    yield client
+    nuke_prefixed_buckets(get_prefix(), client)
+
+
+@pytest.mark.iam_account
+@pytest.mark.sns
+def test_account_topic(sns):
+    name = get_new_topic_name()
+
+    response = sns.create_topic(Name=name)
+    arn = response['TopicArn']
+    assert arn.startswith('arn:aws:sns:')
+    assert arn.endswith(f':{name}')
+
+    response = sns.list_topics()
+    assert arn in [p['TopicArn'] for p in response['Topics']]
+
+    sns.set_topic_attributes(TopicArn=arn, AttributeName='Policy', AttributeValue='')
+
+    response = sns.get_topic_attributes(TopicArn=arn)
+    assert 'Attributes' in response
+
+    sns.delete_topic(TopicArn=arn)
+
+    response = sns.list_topics()
+    assert arn not in [p['TopicArn'] for p in response['Topics']]
+
+    with pytest.raises(sns.exceptions.NotFoundException):
+        sns.get_topic_attributes(TopicArn=arn)
+    sns.delete_topic(TopicArn=arn)
+
+@pytest.mark.iam_account
+@pytest.mark.sns
+def test_cross_account_topic(sns, sns_alt):
+    name = get_new_topic_name()
+    arn = sns.create_topic(Name=name)['TopicArn']
+
+    # not visible to any alt user apis
+    with pytest.raises(sns.exceptions.NotFoundException):
+        sns_alt.get_topic_attributes(TopicArn=arn)
+    with pytest.raises(sns.exceptions.NotFoundException):
+        sns_alt.set_topic_attributes(TopicArn=arn, AttributeName='Policy', AttributeValue='')
+
+    # delete returns success
+    sns_alt.delete_topic(TopicArn=arn)
+
+    response = sns_alt.list_topics()
+    assert arn not in [p['TopicArn'] for p in response['Topics']]
+
+@pytest.mark.iam_account
+@pytest.mark.sns
+def test_account_topic_publish(sns, s3):
+    name = get_new_topic_name()
+
+    response = sns.create_topic(Name=name)
+    topic_arn = response['TopicArn']
+
+    bucket = get_new_bucket_name()
+    s3.create_bucket(Bucket=bucket)
+
+    config = {'TopicConfigurations': [{
+        'Id': 'id',
+        'TopicArn': topic_arn,
+        'Events': [ 's3:ObjectCreated:*' ],
+        }]}
+    s3.put_bucket_notification_configuration(
+            Bucket=bucket, NotificationConfiguration=config)
+
+@pytest.mark.iam_account
+@pytest.mark.iam_cross_account
+@pytest.mark.sns
+def test_cross_account_topic_publish(sns, s3_alt, iam_alt_root):
+    name = get_new_topic_name()
+
+    response = sns.create_topic(Name=name)
+    topic_arn = response['TopicArn']
+
+    bucket = get_new_bucket_name()
+    s3_alt.create_bucket(Bucket=bucket)
+
+    config = {'TopicConfigurations': [{
+        'Id': 'id',
+        'TopicArn': topic_arn,
+        'Events': [ 's3:ObjectCreated:*' ],
+        }]}
+
+    # expect AccessDenies because no resource policy allows cross-account access
+    e = assert_raises(ClientError, s3_alt.put_bucket_notification_configuration,
+                      Bucket=bucket, NotificationConfiguration=config)
+    status, error_code = _get_status_and_error_code(e.response)
+    assert status == 403
+    assert error_code == 'AccessDenied'
+
+    # add topic policy to allow the alt user
+    alt_principal = iam_alt_root.get_user()['User']['Arn']
+    policy = json.dumps({
+        'Version': '2012-10-17',
+        'Statement': [{
+            'Effect': 'Allow',
+            'Principal': {'AWS': alt_principal},
+            'Action': 'sns:Publish',
+            'Resource': topic_arn
+            }]
+        })
+    sns.set_topic_attributes(TopicArn=topic_arn, AttributeName='Policy',
+                             AttributeValue=policy)
+
+    s3_alt.put_bucket_notification_configuration(
+            Bucket=bucket, NotificationConfiguration=config)