diff --git a/manila_tempest_tests/common/remote_client.py b/manila_tempest_tests/common/remote_client.py
index 29f1b49..45f85d8 100644
--- a/manila_tempest_tests/common/remote_client.py
+++ b/manila_tempest_tests/common/remote_client.py
@@ -80,7 +80,7 @@
         # Shell options below add more clearness on failures,
         # path is extended for some non-cirros guest oses (centos7)
         cmd = CONF.validation.ssh_shell_prologue + " " + cmd
-        LOG.debug("Remote command: %s" % cmd)
+        LOG.debug("Remote command: %s", cmd)
         return self.ssh_client.exec_command(cmd)
 
     @debug_ssh
diff --git a/manila_tempest_tests/tests/api/base.py b/manila_tempest_tests/tests/api/base.py
index 65f1b30..d190b63 100644
--- a/manila_tempest_tests/tests/api/base.py
+++ b/manila_tempest_tests/tests/api/base.py
@@ -91,7 +91,7 @@
             return False  # Do not suppress error if any
         if exc_traceback:
             LOG.error("Suppressed cleanup error in Manila: "
-                      "\n%s" % traceback.format_exc())
+                      "\n%s", traceback.format_exc())
         return True  # Suppress error if any
 
 
@@ -925,7 +925,7 @@
                         client.wait_for_resource_deletion(replica_id=res_id)
                     else:
                         LOG.warning("Provided unsupported resource type for "
-                                    "cleanup '%s'. Skipping." % res["type"])
+                                    "cleanup '%s'. Skipping.", res["type"])
                 res["deleted"] = True
 
     @classmethod
diff --git a/manila_tempest_tests/tests/api/test_security_services.py b/manila_tempest_tests/tests/api/test_security_services.py
index 2e28703..fd884f2 100644
--- a/manila_tempest_tests/tests/api/test_security_services.py
+++ b/manila_tempest_tests/tests/api/test_security_services.py
@@ -183,7 +183,7 @@
             LOG.warning("Caught exception. It is expected in case backend "
                         "fails having security-service with improper data "
                         "that leads to share-server creation error. "
-                        "%s" % six.text_type(e))
+                        "%s", six.text_type(e))
 
         update_data = {
             "name": "name",
diff --git a/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py b/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py
index d60b458..c63e7ce 100644
--- a/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py
+++ b/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py
@@ -115,7 +115,7 @@
             LOG.warning("Caught exception. It is expected in case backend "
                         "fails having security-service with improper data "
                         "that leads to share-server creation error. "
-                        "%s" % six.text_type(e))
+                        "%s", six.text_type(e))
 
         self.assertRaises(lib_exc.Forbidden,
                           self.cl.remove_sec_service_from_share_network,
diff --git a/manila_tempest_tests/tests/api/test_security_services_negative.py b/manila_tempest_tests/tests/api/test_security_services_negative.py
index eb871a6..cfa97bf 100644
--- a/manila_tempest_tests/tests/api/test_security_services_negative.py
+++ b/manila_tempest_tests/tests/api/test_security_services_negative.py
@@ -101,7 +101,7 @@
             LOG.warning("Caught exception. It is expected in case backend "
                         "fails having security-service with improper data "
                         "that leads to share-server creation error. "
-                        "%s" % six.text_type(e))
+                        "%s", six.text_type(e))
 
         self.assertRaises(lib_exc.Forbidden,
                           self.shares_client.update_security_service,
diff --git a/manila_tempest_tests/tests/scenario/manager_share.py b/manila_tempest_tests/tests/scenario/manager_share.py
index 6c25785..1c67182 100644
--- a/manila_tempest_tests/tests/scenario/manager_share.py
+++ b/manila_tempest_tests/tests/scenario/manager_share.py
@@ -228,7 +228,7 @@
         try:
             linux_client.validate_authentication()
         except Exception:
-            LOG.exception('Initializing SSH connection to %s failed' % ip)
+            LOG.exception('Initializing SSH connection to %s failed', ip)
             self._log_console_output()
             raise
 
diff --git a/manila_tempest_tests/tests/scenario/test_share_basic_ops.py b/manila_tempest_tests/tests/scenario/test_share_basic_ops.py
index ea79ef2..7dba83b 100644
--- a/manila_tempest_tests/tests/scenario/test_share_basic_ops.py
+++ b/manila_tempest_tests/tests/scenario/test_share_basic_ops.py
@@ -189,7 +189,7 @@
                 first_address = net_addresses.values()[0][0]
                 ip = first_address['addr']
             except Exception:
-                LOG.debug("Instance: %s" % instance)
+                LOG.debug("Instance: %s", instance)
                 # In case on an error ip will be still none
                 LOG.exception("Instance does not have a valid IP address."
                               "Falling back to default")