It looks like a duplicate of old issue https://github.com/localstack/localstack/issues/78
But now it's reproducible for me with the latest version of LocalStack. 
<TagQueueResponse>
                    <ResponseMetadata>
                        <RequestId>{}</RequestId>
                    </ResponseMetadata>
                </TagQueueResponse>
            """).strip().format(uuid.uuid4())
            return new_response
        elif action == 'ListQueueTags':
            new_response = Response()
            new_response.status_code = 200
            new_response._content = ("""
                <?xml version="1.0"?>
                <ListQueueTagsResponse xmlns="{}">
                    <ListQueueTagsResult/>
                    <ResponseMetadata>
                        <RequestId>{}</RequestId>
                    </ResponseMetadata>
                </ListQueueTagsResponse>
            """).strip().format(XMLNS_SQS, uuid.uuid4())
            return new_response
    
    
    
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