diff --git a/tempest/api/network/admin/test_l3_agent_scheduler.py b/tempest/api/network/admin/test_l3_agent_scheduler.py
index eb397ba..f4050c5 100644
--- a/tempest/api/network/admin/test_l3_agent_scheduler.py
+++ b/tempest/api/network/admin/test_l3_agent_scheduler.py
@@ -76,11 +76,8 @@
         resp, body = self.admin_client.remove_router_from_l3_agent(
             self.agent['id'], router['router']['id'])
         self.assertEqual('204', resp['status'])
-        resp, body = self.admin_client.list_l3_agents_hosting_router(
-            router['router']['id'])
-        for agent in body['agents']:
-            l3_agent_ids.append(agent['id'])
-        self.assertNotIn(self.agent['id'], l3_agent_ids)
+        # NOTE(afazekas): The deletion not asserted, because neutron
+        # is not forbidden to reschedule the router to the same agent
 
 
 class L3AgentSchedulerTestXML(L3AgentSchedulerTestJSON):
diff --git a/tempest/common/commands.py b/tempest/common/commands.py
index 6405eaa..c31a038 100644
--- a/tempest/common/commands.py
+++ b/tempest/common/commands.py
@@ -73,3 +73,7 @@
 
 def iptables_ns(ns, table):
     return ip_ns_exec(ns, "iptables -v -S -t " + table)
+
+
+def ovs_db_dump():
+    return sudo_cmd_call("ovsdb-client dump")
diff --git a/tempest/common/debug.py b/tempest/common/debug.py
index 8325d4d..6a496c2 100644
--- a/tempest/common/debug.py
+++ b/tempest/common/debug.py
@@ -38,3 +38,15 @@
         for table in ['filter', 'nat', 'mangle']:
             LOG.info('ns(%s) table(%s):\n%s', ns, table,
                      commands.iptables_ns(ns, table))
+
+
+def log_ovs_db():
+    if not CONF.debug.enable or not CONF.service_available.neutron:
+        return
+    db_dump = commands.ovs_db_dump()
+    LOG.info("OVS DB:\n" + db_dump)
+
+
+def log_net_debug():
+    log_ip_ns()
+    log_ovs_db()
diff --git a/tempest/scenario/test_minimum_basic.py b/tempest/scenario/test_minimum_basic.py
index 39b7760..24d2677 100644
--- a/tempest/scenario/test_minimum_basic.py
+++ b/tempest/scenario/test_minimum_basic.py
@@ -97,7 +97,7 @@
         except Exception:
             LOG.exception('ssh to server failed')
             self._log_console_output()
-            debug.log_ip_ns()
+            debug.log_net_debug()
             raise
 
     def check_partitions(self):
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index 489b271..d5ab3d3 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -172,7 +172,7 @@
         except Exception:
             LOG.exception('Tenant connectivity check failed')
             self._log_console_output(servers=self.servers.keys())
-            debug.log_ip_ns()
+            debug.log_net_debug()
             raise
 
     def _create_and_associate_floating_ips(self):
@@ -204,7 +204,7 @@
                 ex_msg += ": " + msg
             LOG.exception(ex_msg)
             self._log_console_output(servers=self.servers.keys())
-            debug.log_ip_ns()
+            debug.log_net_debug()
             raise
 
     def _disassociate_floating_ips(self):
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index d404dd1..b9ee040 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -343,7 +343,7 @@
                                                             should_succeed),
                             msg)
         except Exception:
-            debug.log_ip_ns()
+            debug.log_net_debug()
             raise
 
     def _test_in_tenant_block(self, tenant):
diff --git a/tempest/thirdparty/boto/test.py b/tempest/thirdparty/boto/test.py
index 10d421e..4c39f78 100644
--- a/tempest/thirdparty/boto/test.py
+++ b/tempest/thirdparty/boto/test.py
@@ -108,6 +108,9 @@
     CODE_RE = '.*'  # regexp makes sense in group match
 
     def match(self, exc):
+        """:returns: Retruns with an error string if not matches,
+               returns with None when matches.
+        """
         if not isinstance(exc, exception.BotoServerError):
             return "%r not an BotoServerError instance" % exc
         LOG.info("Status: %s , error_code: %s", exc.status, exc.error_code)
@@ -119,6 +122,7 @@
             return ("Error code (%s) does not match" +
                     "the expected re pattern \"%s\"") %\
                    (exc.error_code, self.CODE_RE)
+        return None
 
 
 class ClientError(BotoExceptionMatcher):
@@ -313,7 +317,7 @@
             except ValueError:
                 return "_GONE"
             except exception.EC2ResponseError as exc:
-                if colusure_matcher.match(exc):
+                if colusure_matcher.match(exc) is None:
                     return "_GONE"
                 else:
                     raise
@@ -449,7 +453,7 @@
                 return "_GONE"
             except exception.EC2ResponseError as exc:
                 if cls.ec2_error_code.\
-                        client.InvalidInstanceID.NotFound.match(exc):
+                        client.InvalidInstanceID.NotFound.match(exc) is None:
                     return "_GONE"
                 # NOTE(afazekas): incorrect code,
                 # but the resource must be destoreyd