diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index bab60489..b22d68fe 100644
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -1211,7 +1211,7 @@ class VPCGatewayAttachmentBackend(object):
         return attachment
 
 
-class SpotInstanceRequest(BotoSpotRequest):
+class SpotInstanceRequest(BotoSpotRequest, TaggedEC2Instance):
     def __init__(self, spot_request_id, price, image_id, type, valid_from,
                  valid_until, launch_group, availability_zone_group, key_name,
                  security_groups, user_data, instance_type, placement, kernel_id,
diff --git a/moto/ec2/responses/spot_instances.py b/moto/ec2/responses/spot_instances.py
index fd848093..4bc9b943 100644
--- a/moto/ec2/responses/spot_instances.py
+++ b/moto/ec2/responses/spot_instances.py
@@ -186,6 +186,16 @@ DESCRIBE_SPOT_INSTANCES_TEMPLATE = """<DescribeSpotInstanceRequestsResponse xmln
           </PlacementRequestType>
         {% endif %}
       </launchSpecification>
+      <tagSet>
+        {% for tag in request.get_tags() %}
+          <item>
+            <resourceId>{{ tag.resource_id }}</resourceId>
+            <resourceType>{{ tag.resource_type }}</resourceType>
+            <key>{{ tag.key }}</key>
+            <value>{{ tag.value }}</value>
+          </item>
+        {% endfor %}
+      </tagSet>
       {% if request.launch_group %}
         <launchGroup>{{ request.launch_group }}</launchGroup>
       {% endif %}
diff --git a/tests/test_ec2/test_spot_instances.py b/tests/test_ec2/test_spot_instances.py
index a79b70e0..d28b96b8 100644
--- a/tests/test_ec2/test_spot_instances.py
+++ b/tests/test_ec2/test_spot_instances.py
@@ -125,3 +125,24 @@ def test_request_spot_instances_fulfilled():
     request = requests[0]
 
     request.state.should.equal("active")
+
+
+@mock_ec2
+def test_tag_spot_instance_request():
+    """
+    Test that moto correctly tags a spot instance request
+    """
+    conn = boto.connect_ec2()
+
+    request = conn.request_spot_instances(
+        price=0.5, image_id='ami-abcd1234',
+    )
+    request[0].add_tag('tag1', 'value1')
+    request[0].add_tag('tag2', 'value2')
+
+    requests = conn.get_all_spot_instance_requests()
+    requests.should.have.length_of(1)
+    request = requests[0]
+
+    tag_dict = dict(request.tags)
+    tag_dict.should.equal({'tag1' : 'value1', 'tag2' : 'value2'})