diff --git a/inventory_provider/routes/default.py b/inventory_provider/routes/default.py
index f65d6124835c09f70459f9d2defe01a36e23dbd6..047cc10e3534d092879545c3f3a3ab8cf0e882e8 100644
--- a/inventory_provider/routes/default.py
+++ b/inventory_provider/routes/default.py
@@ -4,42 +4,43 @@ from flask import Blueprint, jsonify, current_app
 from inventory_provider.routes import common
 from inventory_provider.tasks.common import get_current_redis, get_latch
 
-routes = Blueprint("inventory-data-default-routes", __name__)
+routes = Blueprint('inventory-data-default-routes', __name__)
 
 API_VERSION = '0.1'
 
 VERSION_SCHEMA = {
-    "$schema": "http://json-schema.org/draft-07/schema#",
+    '$schema': 'http://json-schema.org/draft-07/schema#',
 
-    "definitions": {
-        "latch": {
-            "type": "object",
-            "properties": {
-                "current": {"type": "integer"},
-                "next": {"type": "integer"},
-                "this": {"type": "integer"},
-                "failure": {"type": "boolean"},
-                "pending": {"type": "boolean"},
+    'definitions': {
+        'latch': {
+            'type': 'object',
+            'properties': {
+                'current': {'type': 'integer'},
+                'next': {'type': 'integer'},
+                'this': {'type': 'integer'},
+                'failure': {'type': 'boolean'},
+                'pending': {'type': 'boolean'},
+                'timestamp': {'type': 'number'}
             },
-            "required": ["current", "next", "this", "pending", "failure"],
-            "additionalProperties": False
+            'required': ['current', 'next', 'this', 'pending', 'failure'],
+            'additionalProperties': False
         }
     },
 
-    "type": "object",
-    "properties": {
-        "api": {
-            "type": "string",
-            "pattern": r'\d+\.\d+'
+    'type': 'object',
+    'properties': {
+        'api': {
+            'type': 'string',
+            'pattern': r'\d+\.\d+'
         },
-        "module": {
-            "type": "string",
-            "pattern": r'\d+\.\d+'
+        'module': {
+            'type': 'string',
+            'pattern': r'\d+\.\d+'
         },
-        "latch": {"$ref": "#/definitions/latch"}
+        'latch': {'$ref': '#/definitions/latch'}
     },
-    "required": ["api", "module"],
-    "additionalProperties": False
+    'required': ['api', 'module'],
+    'additionalProperties': False
 }
 
 
@@ -48,7 +49,7 @@ def after_request(resp):
     return common.after_request(resp)
 
 
-@routes.route("/version", methods=['GET', 'POST'])
+@routes.route('/version', methods=['GET', 'POST'])
 @common.require_accepts_json
 def version():
     """
diff --git a/inventory_provider/tasks/common.py b/inventory_provider/tasks/common.py
index ac85afb7de7094517c95cf2ed5f2929b211f6afc..533295b34fdd0ea33eda914a9aacc06fb414b127 100644
--- a/inventory_provider/tasks/common.py
+++ b/inventory_provider/tasks/common.py
@@ -11,17 +11,18 @@ DEFAULT_REDIS_SENTINEL_TIMEOUT = 0.1
 DEFAULT_SENTINEL_SOCKET_TIMEOUT = 0.1
 
 DB_LATCH_SCHEMA = {
-    "$schema": "http://json-schema.org/draft-07/schema#",
-    "type": "object",
-    "properties": {
-        "current": {"type": "integer"},
-        "next": {"type": "integer"},
-        "this": {"type": "integer"},
-        "pending": {"type": "boolean"},
-        "failure": {"type": "boolean"}
+    '$schema': 'http://json-schema.org/draft-07/schema#',
+    'type': 'object',
+    'properties': {
+        'current': {'type': 'integer'},
+        'next': {'type': 'integer'},
+        'this': {'type': 'integer'},
+        'pending': {'type': 'boolean'},
+        'failure': {'type': 'boolean'},
+        'timestamp': {'type': 'number'}
     },
-    "required": ["current", "next", "this"],
-    "additionalProperties": False
+    'required': ['current', 'next', 'this'],
+    'additionalProperties': False
 }
 
 TASK_LOG_SCHEMA = {
diff --git a/test/test_general_routes.py b/test/test_general_routes.py
index 254d9db122b4d944bdd66df67f8a41e5ca67712c..8bc82db71c96426f68d502f8fe4dac4e2414cd40 100644
--- a/test/test_general_routes.py
+++ b/test/test_general_routes.py
@@ -5,59 +5,59 @@ from inventory_provider.routes import common
 from inventory_provider.routes.default import VERSION_SCHEMA
 
 DEFAULT_REQUEST_HEADERS = {
-    "Content-type": "application/json",
-    "Accept": ["application/json"]
+    'Content-type': 'application/json',
+    'Accept': ['application/json']
 }
 
 
 def test_version_request(client, mocked_redis):
 
     rv = client.post(
-        "version",
+        'version',
         headers=DEFAULT_REQUEST_HEADERS)
     assert rv.status_code == 200
     jsonschema.validate(
-        json.loads(rv.data.decode("utf-8")),
+        json.loads(rv.data.decode('utf-8')),
         VERSION_SCHEMA)
 
 
 def test_load_json_docs(data_config, mocked_redis):
 
     INTERFACE_SCHEMA = {
-        "$schema": "http://json-schema.org/draft-07/schema#",
+        '$schema': 'http://json-schema.org/draft-07/schema#',
 
-        "definitions": {
-            "interface": {
-                "type": "object",
-                "properties": {
-                    "logical-system": {"type": "string"},
-                    "name": {"type": "string"},
-                    "description": {"type": "string"},
-                    "bundle": {
-                        "type": "array",
-                        "items": {"type": "string"}
+        'definitions': {
+            'interface': {
+                'type': 'object',
+                'properties': {
+                    'logical-system': {'type': 'string'},
+                    'name': {'type': 'string'},
+                    'description': {'type': 'string'},
+                    'bundle': {
+                        'type': 'array',
+                        'items': {'type': 'string'}
                     },
-                    "ipv4": {
-                        "type": "array",
-                        "items": {"type": "string"}
+                    'ipv4': {
+                        'type': 'array',
+                        'items': {'type': 'string'}
                     },
-                    "ipv6": {
-                        "type": "array",
-                        "items": {"type": "string"}
+                    'ipv6': {
+                        'type': 'array',
+                        'items': {'type': 'string'}
                     }
                 },
-                "required": ["name", "description", "ipv4", "ipv6"],
-                "additionalProperties": False
+                'required': ['name', 'description', 'ipv4', 'ipv6'],
+                'additionalProperties': False
             }
         },
 
-        "type": "object",
-        "properties": {
-            "key": {"type": "string"},
-            "value": {"$ref": "#/definitions/interface"}
+        'type': 'object',
+        'properties': {
+            'key': {'type': 'string'},
+            'value': {'$ref': '#/definitions/interface'}
         },
-        "required": ["key", "value"],
-        "additionalProperties": False
+        'required': ['key', 'value'],
+        'additionalProperties': False
     }
 
     for ifc in common.load_json_docs(