diff --git a/moto/ses/exceptions.py b/moto/ses/exceptions.py
index d3e60aef..46564af1 100644
--- a/moto/ses/exceptions.py
+++ b/moto/ses/exceptions.py
@@ -36,6 +36,29 @@ class TemplateNameAlreadyExists(RESTError):
         )
 
 
+class ValidationError(RESTError):
+    code = 400
+
+    def __init__(self, message):
+        super(ValidationError, self).__init__("ValidationError", message)
+
+
+class InvalidParameterValue(RESTError):
+    code = 400
+
+    def __init__(self, message):
+        super(InvalidParameterValue, self).__init__("InvalidParameterValue", message)
+
+
+class InvalidRenderingParameterException:
+    code = 400
+
+    def __init__(self, message):
+        super(InvalidRenderingParameterException, self).__init__(
+            "InvalidRenderingParameterException", message
+        )
+
+
 class TemplateDoesNotExist(RESTError):
     code = 400
 
diff --git a/moto/ses/models.py b/moto/ses/models.py
index d9a44a37..138c33f3 100644
--- a/moto/ses/models.py
+++ b/moto/ses/models.py
@@ -1,8 +1,12 @@
 from __future__ import unicode_literals
 
-import datetime
+import json
 import email
+import datetime
+from email.mime.base import MIMEBase
 from email.utils import parseaddr
+from email.mime.multipart import MIMEMultipart
+from email.encoders import encode_7or8bit
 
 from moto.core import BaseBackend, BaseModel
 from moto.sns.models import sns_backends
@@ -11,6 +15,9 @@ from .exceptions import (
     ConfigurationSetDoesNotExist,
     EventDestinationAlreadyExists,
     TemplateNameAlreadyExists,
+    ValidationError,
+    InvalidParameterValue,
+    InvalidRenderingParameterException,
     TemplateDoesNotExist,
     RuleSetNameAlreadyExists,
     RuleSetDoesNotExist,
@@ -288,8 +295,36 @@ class SESBackend(BaseBackend):
 
     def add_template(self, template_info):
         template_name = template_info["template_name"]
+        if not template_name:
+            raise ValidationError(
+                "1 validation error detected: "
+                "Value null at 'template.templateName'"
+                "failed to satisfy constraint: Member must not be null"
+            )
+
         if self.templates.get(template_name, None):
             raise TemplateNameAlreadyExists("Duplicate Template Name.")
+
+        template_subject = template_info["subject_part"]
+        if not template_subject:
+            raise InvalidParameterValue("The subject must be specified.")
+        self.templates[template_name] = template_info
+
+    def update_template(self, template_info):
+        template_name = template_info["template_name"]
+        if not template_name:
+            raise ValidationError(
+                "1 validation error detected: "
+                "Value null at 'template.templateName'"
+                "failed to satisfy constraint: Member must not be null"
+            )
+
+        if not self.templates.get(template_name, None):
+            raise TemplateDoesNotExist("Invalid Template Name.")
+
+        template_subject = template_info["subject_part"]
+        if not template_subject:
+            raise InvalidParameterValue("The subject must be specified.")
         self.templates[template_name] = template_info
 
     def get_template(self, template_name):
@@ -300,6 +335,50 @@ class SESBackend(BaseBackend):
     def list_templates(self):
         return list(self.templates.values())
 
+    def render_template(self, render_data):
+        template_name = render_data.get("name", "")
+        template = self.templates.get(template_name, None)
+        if not template:
+            raise TemplateDoesNotExist("Invalid Template Name.")
+
+        template_data = render_data.get("data")
+        try:
+            template_data = json.loads(template_data)
+        except ValueError:
+            raise InvalidRenderingParameterException(
+                "Template rendering data is invalid"
+            )
+
+        subject_part = template["subject_part"]
+        text_part = template["text_part"]
+        html_part = template["html_part"]
+
+        for key, value in template_data.items():
+            subject_part = str.replace(str(subject_part), "{{%s}}" % key, value)
+            text_part = str.replace(str(text_part), "{{%s}}" % key, value)
+            html_part = str.replace(str(html_part), "{{%s}}" % key, value)
+
+        email = MIMEMultipart("alternative")
+
+        mime_text = MIMEBase("text", "plain;charset=UTF-8")
+        mime_text.set_payload(text_part.encode("utf-8"))
+        encode_7or8bit(mime_text)
+        email.attach(mime_text)
+
+        mime_html = MIMEBase("text", "html;charset=UTF-8")
+        mime_html.set_payload(html_part.encode("utf-8"))
+        encode_7or8bit(mime_html)
+        email.attach(mime_html)
+
+        now = datetime.datetime.now().isoformat()
+
+        rendered_template = "Date: %s\r\nSubject: %s\r\n%s" % (
+            now,
+            subject_part,
+            email.as_string(),
+        )
+        return rendered_template
+
     def create_receipt_rule_set(self, rule_set_name):
         if self.receipt_rule_set.get(rule_set_name) is not None:
             raise RuleSetNameAlreadyExists("Duplicate receipt rule set Name.")
diff --git a/moto/ses/responses.py b/moto/ses/responses.py
index 93bf5f4f..61a6c565 100644
--- a/moto/ses/responses.py
+++ b/moto/ses/responses.py
@@ -179,15 +179,27 @@ class EmailResponse(BaseResponse):
     def create_template(self):
         template_data = self._get_dict_param("Template")
         template_info = {}
-        template_info["text_part"] = template_data["._text_part"]
-        template_info["html_part"] = template_data["._html_part"]
-        template_info["template_name"] = template_data["._name"]
-        template_info["subject_part"] = template_data["._subject_part"]
+        template_info["text_part"] = template_data.get("._text_part", "")
+        template_info["html_part"] = template_data.get("._html_part", "")
+        template_info["template_name"] = template_data.get("._name", "")
+        template_info["subject_part"] = template_data.get("._subject_part", "")
         template_info["Timestamp"] = datetime.utcnow()
         ses_backend.add_template(template_info=template_info)
         template = self.response_template(CREATE_TEMPLATE)
         return template.render()
 
+    def update_template(self):
+        template_data = self._get_dict_param("Template")
+        template_info = {}
+        template_info["text_part"] = template_data.get("._text_part", "")
+        template_info["html_part"] = template_data.get("._html_part", "")
+        template_info["template_name"] = template_data.get("._name", "")
+        template_info["subject_part"] = template_data.get("._subject_part", "")
+        template_info["Timestamp"] = datetime.utcnow()
+        ses_backend.update_template(template_info=template_info)
+        template = self.response_template(UPDATE_TEMPLATE)
+        return template.render()
+
     def get_template(self):
         template_name = self._get_param("TemplateName")
         template_data = ses_backend.get_template(template_name)
@@ -199,6 +211,12 @@ class EmailResponse(BaseResponse):
         template = self.response_template(LIST_TEMPLATES)
         return template.render(templates=email_templates)
 
+    def test_render_template(self):
+        render_info = self._get_dict_param("Template")
+        rendered_template = ses_backend.render_template(render_info)
+        template = self.response_template(RENDER_TEMPLATE)
+        return template.render(template=rendered_template)
+
     def create_receipt_rule_set(self):
         rule_set_name = self._get_param("RuleSetName")
         ses_backend.create_receipt_rule_set(rule_set_name)
@@ -369,6 +387,13 @@ CREATE_TEMPLATE = """<CreateTemplateResponse xmlns="http://ses.amazonaws.com/doc
   </ResponseMetadata>
 </CreateTemplateResponse>"""
 
+UPDATE_TEMPLATE = """<UpdateTemplateResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
+  <UpdateTemplateResult/>
+  <ResponseMetadata>
+    <RequestId>47e0ef1a-9bf2-11e1-9279-0100e8cf12ba</RequestId>
+  </ResponseMetadata>
+</UpdateTemplateResponse>"""
+
 GET_TEMPLATE = """<GetTemplateResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
     <GetTemplateResult>
         <Template>
@@ -383,6 +408,7 @@ GET_TEMPLATE = """<GetTemplateResponse xmlns="http://ses.amazonaws.com/doc/2010-
     </ResponseMetadata>
 </GetTemplateResponse>"""
 
+
 LIST_TEMPLATES = """<ListTemplatesResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
     <ListTemplatesResult>
         <TemplatesMetadata>
@@ -399,6 +425,19 @@ LIST_TEMPLATES = """<ListTemplatesResponse xmlns="http://ses.amazonaws.com/doc/2
     </ResponseMetadata>
 </ListTemplatesResponse>"""
 
+RENDER_TEMPLATE = """
+<TestRenderTemplateResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
+    <TestRenderTemplateResult>
+      <RenderedTemplate>
+      {{template | e}}
+      </RenderedTemplate>
+    </TestRenderTemplateResult>
+    <ResponseMetadata>
+        <RequestId>47e0ef1a-9bf2-11e1-9279-0100e8cf12ba</RequestId>
+    </ResponseMetadata>
+</TestRenderTemplateResponse>
+"""
+
 CREATE_RECEIPT_RULE_SET = """<CreateReceiptRuleSetResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
   <CreateReceiptRuleSetResult/>
   <ResponseMetadata>
diff --git a/tests/test_ses/test_ses_boto3.py b/tests/test_ses/test_ses_boto3.py
index e3c2b6d3..287eb46b 100644
--- a/tests/test_ses/test_ses_boto3.py
+++ b/tests/test_ses/test_ses_boto3.py
@@ -1,4 +1,5 @@
 from __future__ import unicode_literals
+import json
 
 import boto3
 from botocore.exceptions import ClientError
@@ -484,3 +485,67 @@ def test_create_ses_template():
 
     result = conn.list_templates()
     result["TemplatesMetadata"][0]["Name"].should.equal("MyTemplate")
+
+
+@mock_ses
+def test_render_template():
+    conn = boto3.client("ses", region_name="us-east-1")
+
+    kwargs = dict(
+        TemplateName="MyTestTemplate",
+        TemplateData=json.dumps({"name": "John", "favoriteanimal": "Lion"}),
+    )
+
+    with pytest.raises(ClientError) as ex:
+        conn.test_render_template(**kwargs)
+    ex.value.response["Error"]["Code"].should.equal("TemplateDoesNotExist")
+
+    conn.create_template(
+        Template={
+            "TemplateName": "MyTestTemplate",
+            "SubjectPart": "Greetings, {{name}}!",
+            "TextPart": "Dear {{name}},"
+            "\r\nYour favorite animal is {{favoriteanimal}}.",
+            "HtmlPart": "<h1>Hello {{name}},"
+            "</h1><p>Your favorite animal is {{favoriteanimal}}.</p>",
+        }
+    )
+    result = conn.test_render_template(**kwargs)
+    result["RenderedTemplate"].should.contain("Subject: Greetings, John!")
+    result["RenderedTemplate"].should.contain("Dear John,")
+    result["RenderedTemplate"].should.contain("<h1>Hello John,</h1>")
+    result["RenderedTemplate"].should.contain("Your favorite animal is Lion")
+
+
+@mock_ses
+def test_update_ses_template():
+    conn = boto3.client("ses", region_name="us-east-1")
+    template = {
+        "TemplateName": "MyTemplateToUpdate",
+        "SubjectPart": "Greetings, {{name}}!",
+        "TextPart": "Dear {{name}}," "\r\nYour favorite animal is {{favoriteanimal}}.",
+        "HtmlPart": "<h1>Hello {{name}},"
+        "</h1><p>Your favorite animal is {{favoriteanimal}}.</p>",
+    }
+
+    with pytest.raises(ClientError) as ex:
+        conn.update_template(Template=template)
+    ex.value.response["Error"]["Code"].should.equal("TemplateDoesNotExist")
+
+    conn.create_template(Template=template)
+
+    template["SubjectPart"] = "Hi, {{name}}!"
+    template["TextPart"] = "Dear {{name}},\r\n Your favorite color is {{color}}"
+    template[
+        "HtmlPart"
+    ] = "<h1>Hello {{name}},</h1><p>Your favorite color is {{color}}</p>"
+    conn.update_template(Template=template)
+
+    result = conn.get_template(TemplateName=template["TemplateName"])
+    result["Template"]["SubjectPart"].should.equal("Hi, {{name}}!")
+    result["Template"]["TextPart"].should.equal(
+        "Dear {{name}},\n Your favorite color is {{color}}"
+    )
+    result["Template"]["HtmlPart"].should.equal(
+        "<h1>Hello {{name}},</h1><p>Your favorite color is {{color}}</p>"
+    )