diff --git a/microk8s-resources/actions/common/utils.sh b/microk8s-resources/actions/common/utils.sh
index 986cba8e..9cf7b79e 100644
--- a/microk8s-resources/actions/common/utils.sh
+++ b/microk8s-resources/actions/common/utils.sh
@@ -674,6 +674,7 @@ is_first_boot() {
   # The last-start-date file contains a date in seconds
   # if that date is prior to the creation date of /proc/1 we assume this is the first
   # time after the host booted
+  # Note, lxc shares the same /proc/stat as the host
   if ! [ -e "$1/last-start-date" ] ||
      ! [ -e /proc/1 ]
   then
@@ -681,7 +682,8 @@ is_first_boot() {
   else
     last_start=$("$SNAP/bin/cat" "$1/last-start-date")
     if [ -e /proc/stat ] &&
-       grep btime /proc/stat
+       grep btime /proc/stat &&
+       ! grep lxc /proc/1/environ
     then
       boot_time=$(grep btime /proc/stat | cut -d' ' -f2)
     else
diff --git a/scripts/cluster/agent.py b/scripts/cluster/agent.py
index 9708d940..43808c10 100644
--- a/scripts/cluster/agent.py
+++ b/scripts/cluster/agent.py
@@ -9,7 +9,6 @@ import string
 import subprocess
 import sys
 import time
-from typing import List
 
 import yaml
 
diff --git a/tests/test-addons.py b/tests/test-addons.py
index 0605b824..7e259d07 100644
--- a/tests/test-addons.py
+++ b/tests/test-addons.py
@@ -429,6 +429,6 @@ class TestAddons(object):
             validate_openebs()
             print("Disabling OpenEBS")
             microk8s_disable("openebs:force")
-        except CalledProcessError as err:
+        except CalledProcessError:
             print("Nothing to do, since iscsid is not available")
             return
diff --git a/tests/validators.py b/tests/validators.py
index d1ea3ed8..e87d4f16 100644
--- a/tests/validators.py
+++ b/tests/validators.py
@@ -1,6 +1,5 @@
 import time
 import os
-import shutil
 import re
 import requests
 import platform
diff --git a/tox.ini b/tox.ini
index 78edcf23..efde3759 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ envdir = {toxinidir}/.tox_env
 passenv =
     MK8S_*
 deps =
-    black
+    black ==21.4b2
     flake8
     flake8-colors
     pep8-naming
@@ -19,7 +19,7 @@ deps =
 [testenv:lint]
 commands =
     -flake8
-    codespell --ignore-words-list="aks" --quiet-level=2 --skip="*.patch,*.spec,.tox_env"
+    codespell --ignore-words-list="aks" --quiet-level=2 --skip="*.patch,*.spec,.tox_env,.git"
     black --diff --check --exclude "/(\.eggs|\.git|\.tox|\.venv|\.build|dist|charmhelpers|mod)/" .
 
 [testenv:func]