diff --git a/LibreNMS/Authentication/ADAuthorizationAuthorizer.php b/LibreNMS/Authentication/ADAuthorizationAuthorizer.php
index 94c3b95cc2..2ce3e7db4f 100644
--- a/LibreNMS/Authentication/ADAuthorizationAuthorizer.php
+++ b/LibreNMS/Authentication/ADAuthorizationAuthorizer.php
@@ -11,8 +11,8 @@ class ADAuthorizationAuthorizer extends MysqlAuthorizer
     use LdapSessionCache;
     use ActiveDirectoryCommon;
 
-    protected static $AUTH_IS_EXTERNAL = 1;
-    protected static $CAN_UPDATE_PASSWORDS = 0;
+    protected static $AUTH_IS_EXTERNAL = true;
+    protected static $CAN_UPDATE_PASSWORDS = false;
 
     protected $ldap_connection;
 
@@ -68,7 +68,7 @@ class ADAuthorizationAuthorizer extends MysqlAuthorizer
     public function userExists($username, $throw_exception = false)
     {
         if ($this->authLdapSessionCacheGet('user_exists')) {
-            return 1;
+            return true;
         }
 
         $search = ldap_search(
@@ -86,10 +86,10 @@ class ADAuthorizationAuthorizer extends MysqlAuthorizer
              */
             $this->authLdapSessionCacheSet('user_exists', 1);
 
-            return 1;
+            return true;
         }
 
-        return 0;
+        return false;
     }
 
     public function getUserlevel($username)
diff --git a/LibreNMS/Authentication/ActiveDirectoryAuthorizer.php b/LibreNMS/Authentication/ActiveDirectoryAuthorizer.php
index 3d99751b5c..e743a9d2c5 100644
--- a/LibreNMS/Authentication/ActiveDirectoryAuthorizer.php
+++ b/LibreNMS/Authentication/ActiveDirectoryAuthorizer.php
@@ -14,7 +14,7 @@ class ActiveDirectoryAuthorizer extends AuthorizerBase
 {
     use ActiveDirectoryCommon;
 
-    protected static $CAN_UPDATE_PASSWORDS = 0;
+    protected static $CAN_UPDATE_PASSWORDS = false;
 
     protected $ldap_connection;
     protected $is_bound = false; // this variable tracks if bind has been called so we don't call it multiple times
diff --git a/LibreNMS/Authentication/AuthorizerBase.php b/LibreNMS/Authentication/AuthorizerBase.php
index 7a7677ac00..2e88797ed1 100644
--- a/LibreNMS/Authentication/AuthorizerBase.php
+++ b/LibreNMS/Authentication/AuthorizerBase.php
@@ -28,10 +28,10 @@ use LibreNMS\Interfaces\Authentication\Authorizer;
 
 abstract class AuthorizerBase implements Authorizer
 {
-    protected static $HAS_AUTH_USERMANAGEMENT = 0;
-    protected static $CAN_UPDATE_USER = 0;
-    protected static $CAN_UPDATE_PASSWORDS = 0;
-    protected static $AUTH_IS_EXTERNAL = 0;
+    protected static $HAS_AUTH_USERMANAGEMENT = false;
+    protected static $CAN_UPDATE_USER = false;
+    protected static $CAN_UPDATE_PASSWORDS = false;
+    protected static $AUTH_IS_EXTERNAL = false;
 
     public function canUpdatePasswords($username = '')
     {
@@ -41,7 +41,7 @@ abstract class AuthorizerBase implements Authorizer
     public function changePassword($username, $newpassword)
     {
         //not supported by default
-        return 0;
+        return false;
     }
 
     public function canManageUsers()
@@ -52,13 +52,13 @@ abstract class AuthorizerBase implements Authorizer
     public function addUser($username, $password, $level = 0, $email = '', $realname = '', $can_modify_passwd = 0, $description = '')
     {
         //not supported by default
-        return 0;
+        return false;
     }
 
     public function deleteUser($user_id)
     {
         //not supported by default
-        return 0;
+        return false;
     }
 
     public function canUpdateUsers()
@@ -69,7 +69,7 @@ abstract class AuthorizerBase implements Authorizer
     public function updateUser($user_id, $realname, $level, $can_modify_passwd, $email)
     {
         //not supported by default
-        return 0;
+        return false;
     }
 
     public function authIsExternal()
diff --git a/LibreNMS/Authentication/HttpAuthAuthorizer.php b/LibreNMS/Authentication/HttpAuthAuthorizer.php
index bd15c49bd3..215e61317d 100644
--- a/LibreNMS/Authentication/HttpAuthAuthorizer.php
+++ b/LibreNMS/Authentication/HttpAuthAuthorizer.php
@@ -7,10 +7,10 @@ use LibreNMS\Exceptions\AuthenticationException;
 
 class HttpAuthAuthorizer extends MysqlAuthorizer
 {
-    protected static $HAS_AUTH_USERMANAGEMENT = 1;
-    protected static $CAN_UPDATE_USER = 1;
-    protected static $CAN_UPDATE_PASSWORDS = 0;
-    protected static $AUTH_IS_EXTERNAL = 1;
+    protected static $HAS_AUTH_USERMANAGEMENT = true;
+    protected static $CAN_UPDATE_USER = true;
+    protected static $CAN_UPDATE_PASSWORDS = false;
+    protected static $AUTH_IS_EXTERNAL = true;
 
     public function authenticate($credentials)
     {
diff --git a/LibreNMS/Authentication/LdapAuthorizationAuthorizer.php b/LibreNMS/Authentication/LdapAuthorizationAuthorizer.php
index d499a7b6db..f89ac1d1c9 100644
--- a/LibreNMS/Authentication/LdapAuthorizationAuthorizer.php
+++ b/LibreNMS/Authentication/LdapAuthorizationAuthorizer.php
@@ -33,7 +33,7 @@ class LdapAuthorizationAuthorizer extends AuthorizerBase
     use LdapSessionCache;
 
     protected $ldap_connection;
-    protected static $AUTH_IS_EXTERNAL = 1;
+    protected static $AUTH_IS_EXTERNAL = true;
 
     public function __construct()
     {
@@ -77,7 +77,7 @@ class LdapAuthorizationAuthorizer extends AuthorizerBase
     public function userExists($username, $throw_exception = false)
     {
         if ($this->authLdapSessionCacheGet('user_exists')) {
-            return 1;
+            return true;
         }
 
         $filter = '(' . Config::get('auth_ldap_prefix') . $username . ')';
@@ -90,7 +90,7 @@ class LdapAuthorizationAuthorizer extends AuthorizerBase
          */
             $this->authLdapSessionCacheSet('user_exists', 1);
 
-            return 1;
+            return true;
         }
 
         /*
@@ -98,7 +98,7 @@ class LdapAuthorizationAuthorizer extends AuthorizerBase
          * on some end and the user will be happy if it "just works" after the user
          * has been added to LDAP.
          */
-        return 0;
+        return false;
     }
 
     public function getUserlevel($username)
@@ -209,7 +209,7 @@ class LdapAuthorizationAuthorizer extends AuthorizerBase
             }
         }
 
-        return 0;
+        return false;
     }
 
     protected function getMembername($username)
diff --git a/LibreNMS/Authentication/LdapAuthorizer.php b/LibreNMS/Authentication/LdapAuthorizer.php
index 9e9108dd5f..e835547de3 100644
--- a/LibreNMS/Authentication/LdapAuthorizer.php
+++ b/LibreNMS/Authentication/LdapAuthorizer.php
@@ -76,7 +76,7 @@ class LdapAuthorizer extends AuthorizerBase
             $search = ldap_search($connection, trim(Config::get('auth_ldap_suffix'), ','), $filter);
             $entries = ldap_get_entries($connection, $search);
             if ($entries['count']) {
-                return 1;
+                return true;
             }
         } catch (AuthenticationException $e) {
             if ($throw_exception) {
@@ -92,7 +92,7 @@ class LdapAuthorizer extends AuthorizerBase
             }
         }
 
-        return 0;
+        return false;
     }
 
     public function getUserlevel($username)
@@ -234,7 +234,7 @@ class LdapAuthorizer extends AuthorizerBase
             return $user;
         }
 
-        return 0;
+        return false;
     }
 
     protected function getMembername($username)
diff --git a/LibreNMS/Authentication/MysqlAuthorizer.php b/LibreNMS/Authentication/MysqlAuthorizer.php
index c5711451ea..2386016ca4 100644
--- a/LibreNMS/Authentication/MysqlAuthorizer.php
+++ b/LibreNMS/Authentication/MysqlAuthorizer.php
@@ -9,9 +9,9 @@ use LibreNMS\Exceptions\AuthenticationException;
 
 class MysqlAuthorizer extends AuthorizerBase
 {
-    protected static $HAS_AUTH_USERMANAGEMENT = 1;
-    protected static $CAN_UPDATE_USER = 1;
-    protected static $CAN_UPDATE_PASSWORDS = 1;
+    protected static $HAS_AUTH_USERMANAGEMENT = true;
+    protected static $CAN_UPDATE_USER = true;
+    protected static $CAN_UPDATE_PASSWORDS = true;
 
     public function authenticate($credentials)
     {
@@ -45,9 +45,9 @@ class MysqlAuthorizer extends AuthorizerBase
          */
 
         if (! static::$CAN_UPDATE_PASSWORDS) {
-            return 0;
+            return false;
         } elseif (empty($username) || ! $this->userExists($username)) {
-            return 1;
+            return true;
         } else {
             return User::thisAuth()->where('username', $username)->value('can_modify_passwd');
         }
@@ -57,7 +57,7 @@ class MysqlAuthorizer extends AuthorizerBase
     {
         // check if updating passwords is allowed (mostly for classes that extend this)
         if (! static::$CAN_UPDATE_PASSWORDS) {
-            return 0;
+            return false;
         }
 
         /** @var User $user */
@@ -129,7 +129,7 @@ class MysqlAuthorizer extends AuthorizerBase
         Eloquent::DB()->table('ports_perms')->where('user_id', $user_id)->delete();
         Eloquent::DB()->table('users_prefs')->where('user_id', $user_id)->delete();
 
-        return User::destroy($user_id);
+        return (bool) User::destroy($user_id);
     }
 
     public function getUserlist()
@@ -144,7 +144,7 @@ class MysqlAuthorizer extends AuthorizerBase
             return $user->toArray();
         }
 
-        return null;
+        return false;
     }
 
     public function updateUser($user_id, $realname, $level, $can_modify_passwd, $email)
@@ -156,6 +156,6 @@ class MysqlAuthorizer extends AuthorizerBase
         $user->can_modify_passwd = (int) $can_modify_passwd;
         $user->email = $email;
 
-        $user->save();
+        return $user->save();
     }
 }
diff --git a/LibreNMS/Authentication/RadiusAuthorizer.php b/LibreNMS/Authentication/RadiusAuthorizer.php
index 8fb0e5e08b..e74d7586e4 100644
--- a/LibreNMS/Authentication/RadiusAuthorizer.php
+++ b/LibreNMS/Authentication/RadiusAuthorizer.php
@@ -8,9 +8,9 @@ use LibreNMS\Exceptions\AuthenticationException;
 
 class RadiusAuthorizer extends MysqlAuthorizer
 {
-    protected static $HAS_AUTH_USERMANAGEMENT = 1;
-    protected static $CAN_UPDATE_USER = 1;
-    protected static $CAN_UPDATE_PASSWORDS = 0;
+    protected static $HAS_AUTH_USERMANAGEMENT = true;
+    protected static $CAN_UPDATE_USER = true;
+    protected static $CAN_UPDATE_PASSWORDS = false;
 
     /** @var Radius */
     protected $radius;
diff --git a/LibreNMS/Authentication/SSOAuthorizer.php b/LibreNMS/Authentication/SSOAuthorizer.php
index 328cd0147e..30608b97ac 100644
--- a/LibreNMS/Authentication/SSOAuthorizer.php
+++ b/LibreNMS/Authentication/SSOAuthorizer.php
@@ -34,10 +34,10 @@ use LibreNMS\Util\IP;
  */
 class SSOAuthorizer extends MysqlAuthorizer
 {
-    protected static $HAS_AUTH_USERMANAGEMENT = 1;
-    protected static $CAN_UPDATE_USER = 1;
-    protected static $CAN_UPDATE_PASSWORDS = 0;
-    protected static $AUTH_IS_EXTERNAL = 1;
+    protected static $HAS_AUTH_USERMANAGEMENT = true;
+    protected static $CAN_UPDATE_USER = true;
+    protected static $CAN_UPDATE_PASSWORDS = false;
+    protected static $AUTH_IS_EXTERNAL = true;
 
     public function authenticate($credentials)
     {
diff --git a/LibreNMS/Interfaces/Authentication/Authorizer.php b/LibreNMS/Interfaces/Authentication/Authorizer.php
index be8a35c2e1..746e83144d 100644
--- a/LibreNMS/Interfaces/Authentication/Authorizer.php
+++ b/LibreNMS/Interfaces/Authentication/Authorizer.php
@@ -54,7 +54,7 @@ interface Authorizer
      * can_modify_passwd
      *
      * @param int $user_id
-     * @return array|bool
+     * @return array|false
      */
     public function getUser($user_id);
 
diff --git a/LibreNMS/OS/Airos.php b/LibreNMS/OS/Airos.php
index 0061cfc21d..5ad9f0345e 100644
--- a/LibreNMS/OS/Airos.php
+++ b/LibreNMS/OS/Airos.php
@@ -73,7 +73,7 @@ class Airos extends OS implements
         $location = parent::fetchLocation();
 
         // fix longitude having an extra - in the middle after the decimal point
-        $location->lng = preg_replace('/(-?\d+)\.-?(\d+)/', '$1.$2', $location->getAttributes()['lng']);
+        $location->lng = (float) preg_replace('/(-?\d+)\.-?(\d+)/', '$1.$2', $location->getAttributes()['lng']);
 
         return $location;
     }
diff --git a/LibreNMS/OS/Zxdsl.php b/LibreNMS/OS/Zxdsl.php
index 8542d33dae..3f8bfba49b 100644
--- a/LibreNMS/OS/Zxdsl.php
+++ b/LibreNMS/OS/Zxdsl.php
@@ -43,7 +43,7 @@ class Zxdsl extends \LibreNMS\OS
         $variant = ' ';
         $parts = explode('.', trim($oid, '.'));
         foreach ($parts as $part) {
-            $variant .= chr(64 + $part);
+            $variant .= chr(64 + (int) $part);
         }
 
         return trim($variant);
diff --git a/database/migrations/2021_02_09_122930_migrate_to_utf8mb4.php b/database/migrations/2021_02_09_122930_migrate_to_utf8mb4.php
index 190300172a..3599899513 100644
--- a/database/migrations/2021_02_09_122930_migrate_to_utf8mb4.php
+++ b/database/migrations/2021_02_09_122930_migrate_to_utf8mb4.php
@@ -39,7 +39,6 @@ class MigrateToUtf8mb4 extends Migration
         // Get the list of all tables
         $tableNames = DB::table('information_schema.tables')
             ->where('table_schema', $databaseName)
-            ->get(['TABLE_NAME'])
             ->pluck('TABLE_NAME');
 
         // Iterate through the list and alter each table
diff --git a/tests/AuthHTTPTest.php b/tests/AuthHTTPTest.php
index c4f2c8bcbd..0f0a2e75c0 100644
--- a/tests/AuthHTTPTest.php
+++ b/tests/AuthHTTPTest.php
@@ -55,11 +55,11 @@ class AuthHTTPTest extends TestCase
     {
         $a = LegacyAuth::reset();
 
-        $this->assertTrue($a->canUpdatePasswords() === 0);
-        $this->assertTrue($a->changePassword(null, null) === 0);
-        $this->assertTrue($a->canManageUsers() === 1);
-        $this->assertTrue($a->canUpdateUsers() === 1);
-        $this->assertTrue($a->authIsExternal() === 1);
+        $this->assertFalse($a->canUpdatePasswords());
+        $this->assertFalse($a->changePassword(null, null));
+        $this->assertTrue($a->canManageUsers());
+        $this->assertTrue($a->canUpdateUsers());
+        $this->assertTrue($a->authIsExternal());
     }
 
     public function testOldBehaviourAgainstCurrent()
diff --git a/tests/AuthSSOTest.php b/tests/AuthSSOTest.php
index da8ddaf1a9..6d78a9941e 100644
--- a/tests/AuthSSOTest.php
+++ b/tests/AuthSSOTest.php
@@ -118,7 +118,7 @@ class AuthSSOTest extends DBTestCase
 
         // Retrieve it and validate
         $dbuser = $a->getUser($a->getUserid($user));
-        $this->assertNull($dbuser);
+        $this->assertFalse($dbuser);
     }
 
     // Excercise general auth flow with creation enabled
@@ -225,11 +225,11 @@ class AuthSSOTest extends DBTestCase
     {
         $a = LegacyAuth::reset();
 
-        $this->assertTrue($a->canUpdatePasswords() === 0);
-        $this->assertTrue($a->changePassword(null, null) === 0);
-        $this->assertTrue($a->canManageUsers() === 1);
-        $this->assertTrue($a->canUpdateUsers() === 1);
-        $this->assertTrue($a->authIsExternal() === 1);
+        $this->assertFalse($a->canUpdatePasswords());
+        $this->assertFalse($a->changePassword(null, null));
+        $this->assertTrue($a->canManageUsers());
+        $this->assertTrue($a->canUpdateUsers());
+        $this->assertTrue($a->authIsExternal());
     }
 
     /* Everything from here comprises of targeted tests to excercise single methods */
diff --git a/tests/SmokepingCliTest.php b/tests/SmokepingCliTest.php
index 8fdcd92d9f..35bcf1cd01 100644
--- a/tests/SmokepingCliTest.php
+++ b/tests/SmokepingCliTest.php
@@ -24,10 +24,10 @@
 
 namespace LibreNMS\Tests;
 
-use app\Console\Commands\SmokepingGenerateCommand;
+use App\Console\Commands\SmokepingGenerateCommand;
 use App\Models\Device;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
-use Illuminate\Support\arr;
+use Illuminate\Support\Arr;
 use Illuminate\Support\Str;
 
 class SmokepingCliTest extends DBTestCase