diff --git a/tobiko/openstack/topology/_neutron.py b/tobiko/openstack/topology/_neutron.py
index da23b29f4..40c2b033e 100644
--- a/tobiko/openstack/topology/_neutron.py
+++ b/tobiko/openstack/topology/_neutron.py
@@ -22,6 +22,7 @@ from oslo_log import log
 
 import tobiko
 from tobiko.openstack import neutron
+from tobiko.openstack.topology import _config
 from tobiko.openstack.topology import _topology
 from tobiko.shell import files
 
@@ -47,10 +48,13 @@ class NeutronNovaCommonReader(tobiko.SharedFixture):
     log_digger: files.MultihostLogFileDigger
     groups: typing.List[str]
     message_pattern: str
-    datetime_pattern = re.compile(r'(\d{4}-\d{2}-\d{2} [0-9:.]+) .+')
+    datetime_pattern: typing.Pattern
+    config = tobiko.required_setup_fixture(_config.OpenStackTopologyConfig)
     service_name = neutron.SERVER
 
     def setup_fixture(self):
+        self.datetime_pattern = re.compile(
+            self.config.conf.log_datetime_pattern)
         self.log_digger = self.useFixture(
             _topology.get_log_file_digger(
                 service_name=self.service_name,
diff --git a/tobiko/openstack/topology/config.py b/tobiko/openstack/topology/config.py
index 853419dda..fa4e859e4 100644
--- a/tobiko/openstack/topology/config.py
+++ b/tobiko/openstack/topology/config.py
@@ -35,6 +35,10 @@ OPTIONS = [
                default=None,
                choices=['', '4', '6'],
                help="Limit connectivity to cloud to IPv4 o IPv6"),
+    cfg.StrOpt('log_datetime_pattern',
+               default=r"(\d{4}-\d{2}-\d{2} [0-9:.]+) .+",
+               help="Regex to be used to parse date and time from "
+                    "the OpenStack services' log lines. "),
 ]