diff --git a/moto/datapipeline/responses.py b/moto/datapipeline/responses.py
index 7ddeec061..70d19d189 100644
--- a/moto/datapipeline/responses.py
+++ b/moto/datapipeline/responses.py
@@ -31,9 +31,9 @@ class DataPipelineResponse(BaseResponse):
     def list_pipelines(self):
         pipelines = self.datapipeline_backend.list_pipelines()
         return json.dumps({
-            "HasMoreResults": False,
-            "Marker": None,
-            "PipelineIdList": [
+            "hasMoreResults": False,
+            "marker": None,
+            "pipelineIdList": [
                 pipeline.to_meta_json() for pipeline in pipelines
             ]
         })
@@ -43,7 +43,7 @@ class DataPipelineResponse(BaseResponse):
         pipelines = self.datapipeline_backend.describe_pipelines(pipeline_ids)
 
         return json.dumps({
-            "PipelineDescriptionList": [
+            "pipelineDescriptionList": [
                 pipeline.to_json() for pipeline in pipelines
             ]
         })
@@ -67,11 +67,10 @@ class DataPipelineResponse(BaseResponse):
         object_ids = self.parameters["objectIds"]
 
         pipeline_objects = self.datapipeline_backend.describe_objects(object_ids, pipeline_id)
-
         return json.dumps({
-            "HasMoreResults": False,
-            "Marker": None,
-            "PipelineObjects": [
+            "hasMoreResults": False,
+            "marker": None,
+            "pipelineObjects": [
                 pipeline_object.to_json() for pipeline_object in pipeline_objects
             ]
         })
diff --git a/tests/test_cloudformation/test_cloudformation_stack_integration.py b/tests/test_cloudformation/test_cloudformation_stack_integration.py
index a47026221..f84535425 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_integration.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_integration.py
@@ -1470,5 +1470,5 @@ def test_datapipeline():
     dp_conn = boto.datapipeline.connect_to_region('us-east-1')
     data_pipelines = dp_conn.list_pipelines()
 
-    data_pipelines['PipelineIdList'].should.have.length_of(1)
-    data_pipelines['PipelineIdList'][0]['name'].should.equal('testDataPipeline')
+    data_pipelines['pipelineIdList'].should.have.length_of(1)
+    data_pipelines['pipelineIdList'][0]['name'].should.equal('testDataPipeline')
diff --git a/tests/test_datapipeline/test_datapipeline.py b/tests/test_datapipeline/test_datapipeline.py
index 27b942271..5a958492f 100644
--- a/tests/test_datapipeline/test_datapipeline.py
+++ b/tests/test_datapipeline/test_datapipeline.py
@@ -20,7 +20,7 @@ def test_create_pipeline():
     res = conn.create_pipeline("mypipeline", "some-unique-id")
 
     pipeline_id = res["pipelineId"]
-    pipeline_descriptions = conn.describe_pipelines([pipeline_id])["PipelineDescriptionList"]
+    pipeline_descriptions = conn.describe_pipelines([pipeline_id])["pipelineDescriptionList"]
     pipeline_descriptions.should.have.length_of(1)
 
     pipeline_description = pipeline_descriptions[0]
@@ -105,7 +105,7 @@ def test_describing_pipeline_objects():
 
     conn.put_pipeline_definition(PIPELINE_OBJECTS, pipeline_id)
 
-    objects = conn.describe_objects(["Schedule", "Default"], pipeline_id)['PipelineObjects']
+    objects = conn.describe_objects(["Schedule", "Default"], pipeline_id)['pipelineObjects']
 
     objects.should.have.length_of(2)
     default_object = [x for x in objects if x['id'] == 'Default'][0]
@@ -125,7 +125,7 @@ def test_activate_pipeline():
     pipeline_id = res["pipelineId"]
     conn.activate_pipeline(pipeline_id)
 
-    pipeline_descriptions = conn.describe_pipelines([pipeline_id])["PipelineDescriptionList"]
+    pipeline_descriptions = conn.describe_pipelines([pipeline_id])["pipelineDescriptionList"]
     pipeline_descriptions.should.have.length_of(1)
     pipeline_description = pipeline_descriptions[0]
     fields = pipeline_description['fields']
@@ -141,14 +141,14 @@ def test_listing_pipelines():
 
     response = conn.list_pipelines()
 
-    response["HasMoreResults"].should.be(False)
-    response["Marker"].should.be.none
-    response["PipelineIdList"].should.have.length_of(2)
-    response["PipelineIdList"].should.contain({
+    response["hasMoreResults"].should.be(False)
+    response["marker"].should.be.none
+    response["pipelineIdList"].should.have.length_of(2)
+    response["pipelineIdList"].should.contain({
         "id": res1["pipelineId"],
         "name": "mypipeline1",
     })
-    response["PipelineIdList"].should.contain({
+    response["pipelineIdList"].should.contain({
         "id": res2["pipelineId"],
         "name": "mypipeline2"
     })
diff --git a/tests/test_datapipeline/test_server.py b/tests/test_datapipeline/test_server.py
index 33a19c6f0..012c5ad55 100644
--- a/tests/test_datapipeline/test_server.py
+++ b/tests/test_datapipeline/test_server.py
@@ -23,5 +23,5 @@ def test_list_streams():
 
     json_data = json.loads(res.data.decode("utf-8"))
     json_data.should.equal({
-        'PipelineDescriptionList': []
+        'pipelineDescriptionList': []
     })