diff --git a/tcp_tests/helpers/env_config.py b/tcp_tests/helpers/env_config.py
index 5dbc87d..b811030 100644
--- a/tcp_tests/helpers/env_config.py
+++ b/tcp_tests/helpers/env_config.py
@@ -150,7 +150,7 @@
     :param path: string
     :returns: key string, indexes list
     """
-    pattern = re.compile("\[([0-9]*)\]")
+    pattern = re.compile(r"\[([0-9]*)\]")
     # find all indexes of possible list object in path
     indexes = (lambda x: [int(r) for r in pattern.findall(x)]
                if pattern.search(x) else [])
diff --git a/tcp_tests/managers/k8smanager.py b/tcp_tests/managers/k8smanager.py
index 0e57c89..5f5f4e8 100644
--- a/tcp_tests/managers/k8smanager.py
+++ b/tcp_tests/managers/k8smanager.py
@@ -252,22 +252,22 @@
         if self.__config.k8s.run_extended_virtlet_conformance:
             ci_image = "cloud-images.ubuntu.com/xenial/current/" \
                        "xenial-server-cloudimg-amd64-disk1.img"
-            cmd = ("set -o pipefail; "
-                   "docker run --net=host {0} /virtlet-e2e-tests "
-                   "-include-cloud-init-tests -junitOutput {3} "
-                   "-image {2} -sshuser ubuntu -memoryLimit 1024 "
-                   "-alsologtostderr -cluster-url http://127.0.0.1:8080 "
-                   "-ginkgo.focus '\[Conformance\]' "
-                   "| tee {1}".format(
+            cmd = (r"set -o pipefail; "
+                   r"docker run --net=host {0} /virtlet-e2e-tests "
+                   r"-include-cloud-init-tests -junitOutput {3} "
+                   r"-image {2} -sshuser ubuntu -memoryLimit 1024 "
+                   r"-alsologtostderr -cluster-url http://127.0.0.1:8080 "
+                   r"-ginkgo.focus '\[Conformance\]' "
+                   r"| tee {1}".format(
                     self.__config.k8s_deploy.kubernetes_virtlet_image,
                     log_file, ci_image, report_name))
         else:
-            cmd = ("set -o pipefail; "
-                   "docker run --net=host {0} /virtlet-e2e-tests "
-                   "-junitOutput {2} "
-                   "-alsologtostderr -cluster-url http://127.0.0.1:8080 "
-                   "-ginkgo.focus '\[Conformance\]' "
-                   "| tee {1}".format(
+            cmd = (r"set -o pipefail; "
+                   r"docker run --net=host {0} /virtlet-e2e-tests "
+                   r"-junitOutput {2} "
+                   r"-alsologtostderr -cluster-url http://127.0.0.1:8080 "
+                   r"-ginkgo.focus '\[Conformance\]' "
+                   r"| tee {1}".format(
                     self.__config.k8s_deploy.kubernetes_virtlet_image,
                     log_file, report_name))
         LOG.info("Executing: {}".format(cmd))
diff --git a/tcp_tests/managers/underlay_ssh_manager.py b/tcp_tests/managers/underlay_ssh_manager.py
index 6b5bebb..3fa05a4 100644
--- a/tcp_tests/managers/underlay_ssh_manager.py
+++ b/tcp_tests/managers/underlay_ssh_manager.py
@@ -414,38 +414,40 @@
         # Prefix each '$' symbol with backslash '\' to disable
         # early interpolation of environment variables on cfg01 node only
         dump_commands = (
-            "mkdir /root/\$(hostname -f)/;"
-            "rsync -aruv /var/log/ /root/\$(hostname -f)/;"
-            "dpkg -l > /root/\$(hostname -f)/dump_dpkg_l.txt;"
-            "df -h > /root/\$(hostname -f)/dump_df.txt;"
-            "mount > /root/\$(hostname -f)/dump_mount.txt;"
-            "blkid -o list > /root/\$(hostname -f)/dump_blkid_o_list.txt;"
-            "iptables -t nat -S > /root/\$(hostname -f)/dump_iptables_nat.txt;"
-            "iptables -S > /root/\$(hostname -f)/dump_iptables.txt;"
-            "ps auxwwf > /root/\$(hostname -f)/dump_ps.txt;"
-            "docker images > /root/\$(hostname -f)/dump_docker_images.txt;"
-            "docker ps > /root/\$(hostname -f)/dump_docker_ps.txt;"
-            "docker service ls > "
-            "  /root/\$(hostname -f)/dump_docker_services_ls.txt;"
-            "for SERVICE in \$(docker service ls | awk '{ print \$2 }'); "
-            "  do docker service ps --no-trunc 2>&1 \$SERVICE >> "
-            "    /root/\$(hostname -f)/dump_docker_service_ps.txt;"
-            "  done;"
-            "for SERVICE in \$(docker service ls | awk '{ print \$2 }'); "
-            "  do timeout 30 docker service logs --no-trunc 2>&1 \$SERVICE > "
-            "    /root/\$(hostname -f)/dump_docker_service_\${SERVICE}_logs;"
-            "  done;"
-            "vgdisplay > /root/\$(hostname -f)/dump_vgdisplay.txt;"
-            "lvdisplay > /root/\$(hostname -f)/dump_lvdisplay.txt;"
-            "ip a > /root/\$(hostname -f)/dump_ip_a.txt;"
-            "ip r > /root/\$(hostname -f)/dump_ip_r.txt;"
-            "netstat -anp > /root/\$(hostname -f)/dump_netstat.txt;"
-            "brctl show > /root/\$(hostname -f)/dump_brctl_show.txt;"
-            "arp -an > /root/\$(hostname -f)/dump_arp.txt;"
-            "uname -a > /root/\$(hostname -f)/dump_uname_a.txt;"
-            "lsmod > /root/\$(hostname -f)/dump_lsmod.txt;"
-            "cat /proc/interrupts > /root/\$(hostname -f)/dump_interrupts.txt;"
-            "cat /etc/*-release > /root/\$(hostname -f)/dump_release.txt;"
+            r"mkdir /root/\$(hostname -f)/;"
+            r"rsync -aruv /var/log/ /root/\$(hostname -f)/;"
+            r"dpkg -l > /root/\$(hostname -f)/dump_dpkg_l.txt;"
+            r"df -h > /root/\$(hostname -f)/dump_df.txt;"
+            r"mount > /root/\$(hostname -f)/dump_mount.txt;"
+            r"blkid -o list > /root/\$(hostname -f)/dump_blkid_o_list.txt;"
+            r"iptables -t nat -S > "
+            r"  /root/\$(hostname -f)/dump_iptables_nat.txt;"
+            r"iptables -S > /root/\$(hostname -f)/dump_iptables.txt;"
+            r"ps auxwwf > /root/\$(hostname -f)/dump_ps.txt;"
+            r"docker images > /root/\$(hostname -f)/dump_docker_images.txt;"
+            r"docker ps > /root/\$(hostname -f)/dump_docker_ps.txt;"
+            r"docker service ls > "
+            r"  /root/\$(hostname -f)/dump_docker_services_ls.txt;"
+            r"for SERVICE in \$(docker service ls | awk '{ print \$2 }'); "
+            r"  do docker service ps --no-trunc 2>&1 \$SERVICE >> "
+            r"    /root/\$(hostname -f)/dump_docker_service_ps.txt;"
+            r"  done;"
+            r"for SERVICE in \$(docker service ls | awk '{ print \$2 }'); "
+            r"  do timeout 30 docker service logs --no-trunc 2>&1 \$SERVICE > "
+            r"    /root/\$(hostname -f)/dump_docker_service_\${SERVICE}_logs;"
+            r"  done;"
+            r"vgdisplay > /root/\$(hostname -f)/dump_vgdisplay.txt;"
+            r"lvdisplay > /root/\$(hostname -f)/dump_lvdisplay.txt;"
+            r"ip a > /root/\$(hostname -f)/dump_ip_a.txt;"
+            r"ip r > /root/\$(hostname -f)/dump_ip_r.txt;"
+            r"netstat -anp > /root/\$(hostname -f)/dump_netstat.txt;"
+            r"brctl show > /root/\$(hostname -f)/dump_brctl_show.txt;"
+            r"arp -an > /root/\$(hostname -f)/dump_arp.txt;"
+            r"uname -a > /root/\$(hostname -f)/dump_uname_a.txt;"
+            r"lsmod > /root/\$(hostname -f)/dump_lsmod.txt;"
+            r"cat /proc/interrupts > "
+            r"  /root/\$(hostname -f)/dump_interrupts.txt;"
+            r"cat /etc/*-release > /root/\$(hostname -f)/dump_release.txt;"
             # OpenStack specific, will fail on other nodes
             # "rabbitmqctl report > "
             # "  /root/\$(hostname -f)/dump_rabbitmqctl.txt;"
@@ -466,12 +468,12 @@
             # " do echo Namespace: \${ns}; ip netns exec \${ns} netstat -anp;"
             # "done > /root/\$(hostname -f)/dump_netstat_ns.txt;"
 
-            "/usr/bin/haproxy-status.sh > "
-            "  /root/\$(hostname -f)/dump_haproxy.txt;"
+            r"/usr/bin/haproxy-status.sh > "
+            r"  /root/\$(hostname -f)/dump_haproxy.txt;"
 
             # Archive the files
-            "cd /root/; tar --absolute-names --warning=no-file-changed "
-            "  -czf \$(hostname -f).tar.gz ./\$(hostname -f)/;"
+            r"cd /root/; tar --absolute-names --warning=no-file-changed "
+            r"  -czf \$(hostname -f).tar.gz ./\$(hostname -f)/;"
         )
 
         master_host = self.__config.salt.salt_master_host
diff --git a/tcp_tests/report.py b/tcp_tests/report.py
index 0bec6ef..8a2a58e 100644
--- a/tcp_tests/report.py
+++ b/tcp_tests/report.py
@@ -188,7 +188,7 @@
     LOG.info("Get results for run - {}".format(run.name))
     results = t_client.results(run, result_type)
     results_with_test = []
-    if result_type is '5':
+    if result_type == '5':
         ret = [(run, r) for r in results
                if r.raw_data()['status_id'] is int(result_type) and
                r.raw_data()['defects'] is None]
diff --git a/tcp_tests/tests/system/test_failover_k8s.py b/tcp_tests/tests/system/test_failover_k8s.py
index 60ac4a7..850cfd1 100644
--- a/tcp_tests/tests/system/test_failover_k8s.py
+++ b/tcp_tests/tests/system/test_failover_k8s.py
@@ -57,9 +57,9 @@
             new_minion_vip =\
                 core_actions.get_keepalived_vip_minion_id(vip)
         except Exception:
-                time.sleep(15)
-                new_minion_vip = \
-                    core_actions.get_keepalived_vip_minion_id(vip)
+            time.sleep(15)
+            new_minion_vip = \
+                core_actions.get_keepalived_vip_minion_id(vip)
         LOG.info("VIP {0} migrated to {1}".format(vip, new_minion_vip))
         assert new_minion_vip != minion_vip
 
diff --git a/tcp_tests/tests/system/test_install_mcp_ovs_pike.py b/tcp_tests/tests/system/test_install_mcp_ovs_pike.py
index d10d250..0c74d20 100644
--- a/tcp_tests/tests/system/test_install_mcp_ovs_pike.py
+++ b/tcp_tests/tests/system/test_install_mcp_ovs_pike.py
@@ -356,9 +356,9 @@
 
         pillar = 'keepalived:cluster:instance:cicd_control_vip:address'
         addresses = salt_deployed.get_pillar('cid01*', pillar)
-        ip = list(set([ip
+        ip = list(set([ipaddr
                   for item in addresses
-                  for node, ip in item.items() if ip]))
+                  for node, ipaddr in item.items() if ipaddr]))
         LOG.info('Jenkins ip is {}'.format(ip))
         try:
             assert len(ip) > 0, 'fail to find jenkins ip'
@@ -367,9 +367,9 @@
                 tgt='cid*', fun='cmd.run',
                 args='service keepalived restart')
             addresses = salt_deployed.get_pillar('cid01*', pillar)
-            ip = list(set([ip
+            ip = list(set([ipaddr
                       for item in addresses
-                      for node, ip in item.items() if ip]))
+                      for node, ipaddr in item.items() if ipaddr]))
             LOG.info('Jenkins ip is {}'.format(ip))
             assert len(ip) > 0, 'fail to find jenkins ip {}'.format(addresses)
 
@@ -457,9 +457,9 @@
 
         pillar = 'keepalived:cluster:instance:cicd_control_vip:address'
         addresses = salt_deployed.get_pillar('cid01*', pillar)
-        ip = list(set([ip
+        ip = list(set([ipaddr
                   for item in addresses
-                  for node, ip in item.items() if ip]))
+                  for node, ipaddr in item.items() if ipaddr]))
         LOG.info('Jenkins ip is {}'.format(ip))
         try:
             assert len(ip) > 0, 'fail to find jenkins ip'
@@ -468,9 +468,9 @@
                 tgt='cid*', fun='cmd.run',
                 args='service keepalived restart')
             addresses = salt_deployed.get_pillar('cid01*', pillar)
-            ip = list(set([ip
+            ip = list(set([ipaddr
                       for item in addresses
-                      for node, ip in item.items() if ip]))
+                      for node, ipaddr in item.items() if ipaddr]))
             LOG.info('Jenkins ip is {}'.format(ip))
             assert len(ip) > 0, 'fail to find jenkins ip {}'.format(addresses)