diff --git a/app/v2/template/post_template.py b/app/v2/template/post_template.py
index ca94ee157..c4ecbc6fe 100644
--- a/app/v2/template/post_template.py
+++ b/app/v2/template/post_template.py
@@ -6,6 +6,7 @@ from werkzeug.exceptions import abort
 
 from app import api_user
 from app.dao import templates_dao
+from app.models import SMS_TYPE
 from app.schema_validation import validate
 from app.utils import get_template_instance
 from app.v2.errors import BadRequestError
@@ -16,6 +17,9 @@ from app.v2.template.template_schemas import post_template_preview_request, crea
 @v2_template_blueprint.route("/<template_id>/preview", methods=['POST'])
 def post_template_preview(template_id):
     _data = request.get_json()
+    if _data is None:
+        _data = {}
+
     _data['id'] = template_id
 
     data = validate(_data, post_template_preview_request)
@@ -28,7 +32,10 @@ def post_template_preview(template_id):
 
     check_placeholders(template_object)
 
+    subject = template_object.subject if template.template_type != SMS_TYPE else None
+
     resp = create_post_template_preview_response(template=template,
+                                                 subject=subject,
                                                  body=str(template_object))
 
     return jsonify(resp), 200
diff --git a/app/v2/template/template_schemas.py b/app/v2/template/template_schemas.py
index 0ad632b9a..dac2c4cde 100644
--- a/app/v2/template/template_schemas.py
+++ b/app/v2/template/template_schemas.py
@@ -49,7 +49,7 @@ post_template_preview_request = {
         "id": uuid,
         "personalisation": personalisation
     },
-    "required": ["id", "personalisation"]
+    "required": ["id"]
 }
 
 post_template_preview_response = {
@@ -68,11 +68,11 @@ post_template_preview_response = {
 }
 
 
-def create_post_template_preview_response(template, body):
+def create_post_template_preview_response(template, subject, body):
     return {
         "id": template.id,
         "type": template.template_type,
         "version": template.version,
         "body": body,
-        "subject": template.subject
+        "subject": subject
     }
diff --git a/tests/app/db.py b/tests/app/db.py
index bcd94c9c3..e2a24f1c3 100644
--- a/tests/app/db.py
+++ b/tests/app/db.py
@@ -39,6 +39,7 @@ def create_service(user=None, service_name="Sample service", service_id=None):
 def create_template(
     service,
     template_type=SMS_TYPE,
+    subject='Template subject',
     content='Dear Sir/Madam, Hello. Yours Truly, The Government.',
     template_id=None
 ):
@@ -50,7 +51,7 @@ def create_template(
         'created_by': service.created_by,
     }
     if template_type != SMS_TYPE:
-        data['subject'] = 'Template subject'
+        data['subject'] = subject
     template = Template(**data)
     dao_create_template(template)
     return template
diff --git a/tests/app/v2/template/test_post_template.py b/tests/app/v2/template/test_post_template.py
index a6c8d542d..4501852c2 100644
--- a/tests/app/v2/template/test_post_template.py
+++ b/tests/app/v2/template/test_post_template.py
@@ -3,27 +3,61 @@ import uuid
 
 from flask import json
 
-from app.models import TEMPLATE_TYPES
+from app.models import SMS_TYPE, TEMPLATE_TYPES
 from tests import create_authorization_header
 from tests.app.db import create_template
 
-valid_data = {
+valid_personalisation = {
     'personalisation': {'Name': 'Jo'}
 }
 
+valid_post = [
+    (
+        "Some subject",
+        "Some content",
+        None,
+        "Some subject",
+        "Some content"
+    ),
+    (
+        "Some subject",
+        "Dear ((Name)), Hello. Yours Truly, The Government.",
+        valid_personalisation,
+        "Some subject",
+        "Dear Jo, Hello. Yours Truly, The Government."
+    ),
+    (
+        "Message for ((Name))",
+        "Dear ((Name)), Hello. Yours Truly, The Government.",
+        valid_personalisation,
+        "Message for Jo",
+        "Dear Jo, Hello. Yours Truly, The Government."
+    ),
+    (
+        "Message for ((Name))",
+        "Some content",
+        valid_personalisation,
+        "Message for Jo",
+        "Some content"
+    ),
+]
+
 
 @pytest.mark.parametrize("tmp_type", TEMPLATE_TYPES)
-def test_valid_post_template_returns_200(client, sample_service, tmp_type):
+@pytest.mark.parametrize("subject,content,post_data,expected_subject,expected_content", valid_post)
+def test_valid_post_template_returns_200(
+        client, sample_service, tmp_type, subject, content, post_data, expected_subject, expected_content):
     template = create_template(
         sample_service,
         template_type=tmp_type,
-        content='Dear ((Name)), Hello. Yours Truly, The Government.')
+        subject=subject,
+        content=content)
 
     auth_header = create_authorization_header(service_id=sample_service.id)
 
     response = client.post(
         path='/v2/template/{}/preview'.format(template.id),
-        data=json.dumps(valid_data),
+        data=json.dumps(post_data),
         headers=[('Content-Type', 'application/json'), auth_header])
 
     assert response.status_code == 200
@@ -31,7 +65,9 @@ def test_valid_post_template_returns_200(client, sample_service, tmp_type):
     resp_json = json.loads(response.get_data(as_text=True))
 
     assert resp_json['id'] == str(template.id)
-    assert 'Dear {}'.format(valid_data['personalisation']['Name']) in resp_json['body']
+    if tmp_type != SMS_TYPE:
+        assert expected_subject in resp_json['subject']
+    assert expected_content in resp_json['body']
 
 
 @pytest.mark.parametrize("tmp_type", TEMPLATE_TYPES)
@@ -45,7 +81,7 @@ def test_invalid_post_template_returns_400(client, sample_service, tmp_type):
 
     response = client.post(
         path='/v2/template/{}/preview'.format(template.id),
-        data=json.dumps(valid_data),
+        data=json.dumps(valid_personalisation),
         headers=[('Content-Type', 'application/json'), auth_header])
 
     assert response.status_code == 400
@@ -61,7 +97,7 @@ def test_post_template_with_non_existent_template_id_returns_404(client, fake_uu
 
     response = client.post(
         path='/v2/template/{}/preview'.format(fake_uuid),
-        data=json.dumps(valid_data),
+        data=json.dumps(valid_personalisation),
         headers=[('Content-Type', 'application/json'), auth_header])
 
     assert response.status_code == 404
diff --git a/tests/app/v2/template/test_template_schemas.py b/tests/app/v2/template/test_template_schemas.py
index 97fca1ca4..c89802942 100644
--- a/tests/app/v2/template/test_template_schemas.py
+++ b/tests/app/v2/template/test_template_schemas.py
@@ -54,7 +54,6 @@ invalid_json_post_args = [
     ({"id": "invalid_uuid", "personalisation": {"key": "value"}}, ["id is not a valid UUID"]),
     ({"id": str(uuid.uuid4()), "personalisation": "invalid_personalisation"},
      ["personalisation should contain key value pairs"]),
-    ({"id": str(uuid.uuid4())}, ["personalisation is a required property"]),
     ({"personalisation": "invalid_personalisation"},
         ["id is a required property",
          "personalisation is a required property",