diff --git a/inventory_provider/routes/poller.py b/inventory_provider/routes/poller.py
index 56b10be12b6b0c25af2fd5a55f4f900ca663873a..cba344637e21ede7915d11343509fba9d31a6f0c 100644
--- a/inventory_provider/routes/poller.py
+++ b/inventory_provider/routes/poller.py
@@ -23,7 +23,7 @@ def poller_interface_oids(hostname):
     snmp_data_string = r.hget(hostname, 'snmp-interfaces')
     if not snmp_data_string:
         return Response(
-            response='no snmp available info for '%r % hostname,
+            response='no snmp available info for %r' % hostname,
             status=404,
             mimetype='text/html')
 
diff --git a/test/per_router/test_poller_routes.py b/test/per_router/test_poller_routes.py
index 2f2b87bc872c7cf00a56fcf9b3768476946d5bc0..e24c63e3e059a0e92aa3cae29067ae847a6f2beb 100644
--- a/test/per_router/test_poller_routes.py
+++ b/test/per_router/test_poller_routes.py
@@ -105,4 +105,3 @@ def test_router_interfaces(router, client_with_mocked_data):
     response = json.loads(rv.data.decode("utf-8"))
     jsonschema.validate(response, interfaces_list_schema)
     assert response  # at least shouldn't be empty
-