diff --git a/_config/routes.yml b/_config/routes.yml
index c7f53fb..e2c2bed 100644
--- a/_config/routes.yml
+++ b/_config/routes.yml
@@ -6,3 +6,9 @@ SilverStripe\Control\Director:
     'health/check': 'Silverstripe\EnvironmentCheck\Controllers\DevHealthController'
     'dev/check/$Suite': 'Silverstripe\EnvironmentCheck\Controllers\DevCheckController'
 
+SilverStripe\Dev\DevelopmentAdmin:
+  registered_controllers:
+    check:
+      controller: Silverstripe\EnvironmentCheck\Controllers\DevCheckController
+      links:
+        check: 'Run registered environment checks and display their status'
diff --git a/src/Controllers/DevCheckController.php b/src/Controllers/DevCheckController.php
index 6b53384..4e0d346 100644
--- a/src/Controllers/DevCheckController.php
+++ b/src/Controllers/DevCheckController.php
@@ -3,6 +3,8 @@
 namespace SilverStripe\EnvironmentCheck\Controllers;
 
 use SilverStripe\Control\Controller;
+use SilverStripe\Control\HTTPRequest;
+use SilverStripe\Control\HTTPResponse_Exception;
 use SilverStripe\EnvironmentCheck\EnvironmentChecker;
 
 /**
diff --git a/src/EnvironmentCheckSuite.php b/src/EnvironmentCheckSuite.php
index 4807ef4..0fe8dea 100644
--- a/src/EnvironmentCheckSuite.php
+++ b/src/EnvironmentCheckSuite.php
@@ -8,10 +8,6 @@ use SilverStripe\Core\Config\Configurable;
 use SilverStripe\Core\Extensible;
 use SilverStripe\Core\Injector\Injectable;
 use SilverStripe\Core\Injector\Injector;
-use SilverStripe\EnvironmentCheck\EnvironmentCheck;
-use SilverStripe\ORM\ArrayList;
-use SilverStripe\View\ArrayData;
-use SilverStripe\View\ViewableData;
 
 /**
  * Represents a suite of environment checks.
@@ -77,7 +73,6 @@ class EnvironmentCheckSuite
      */
     public function __construct($suiteName)
     {
-        $this->constructExtensions();
         if (empty($this->config()->registered_suites[$suiteName])) {
             // Not registered via config system, but it still may be configured later via self::register.
             return;
diff --git a/src/EnvironmentChecker.php b/src/EnvironmentChecker.php
index 96177c3..63617aa 100644
--- a/src/EnvironmentChecker.php
+++ b/src/EnvironmentChecker.php
@@ -9,14 +9,13 @@ use SilverStripe\Control\Email\Email;
 use SilverStripe\Control\HTTPResponse;
 use SilverStripe\Control\HTTPResponse_Exception;
 use SilverStripe\Control\RequestHandler;
-use SilverStripe\Core\Config\Config;
+use SilverStripe\Core\Environment;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Dev\Deprecation;
-use SilverStripe\EnvironmentCheck\EnvironmentCheck;
-use SilverStripe\EnvironmentCheck\EnvironmentCheckSuite;
 use SilverStripe\Security\BasicAuth;
 use SilverStripe\Security\Member;
 use SilverStripe\Security\Permission;
+use SilverStripe\Security\Security;
 
 /**
  * Provides an interface for checking the given EnvironmentCheckSuite.
@@ -102,12 +101,14 @@ class EnvironmentChecker extends RequestHandler
     public function init($permission = 'ADMIN')
     {
         // if the environment supports it, provide a basic auth challenge and see if it matches configured credentials
-        if (getenv('ENVCHECK_BASICAUTH_USERNAME') && getenv('ENVCHECK_BASICAUTH_PASSWORD')) {
+        if (Environment::getEnv('ENVCHECK_BASICAUTH_USERNAME')
+            && Environment::getEnv('ENVCHECK_BASICAUTH_PASSWORD')
+        ) {
             if (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])) {
                 // authenticate the input user/pass with the configured credentials
                 if (!(
-                        $_SERVER['PHP_AUTH_USER'] == getenv('ENVCHECK_BASICAUTH_USERNAME')
-                        && $_SERVER['PHP_AUTH_PW'] == getenv('ENVCHECK_BASICAUTH_PASSWORD')
+                        $_SERVER['PHP_AUTH_USER'] == Environment::getEnv('ENVCHECK_BASICAUTH_USERNAME')
+                        && $_SERVER['PHP_AUTH_PW'] == Environment::getEnv('ENVCHECK_BASICAUTH_PASSWORD')
                     )
                 ) {
                     $response = new HTTPResponse(null, 401);
@@ -143,11 +144,11 @@ class EnvironmentChecker extends RequestHandler
     public function canAccess($member = null, $permission = 'ADMIN')
     {
         if (!$member) {
-            $member = Member::currentUser();
+            $member = Security::getCurrentUser();
         }
 
         if (!$member) {
-            $member = BasicAuth::requireLogin('Environment Checker', $permission, false);
+            $member = BasicAuth::requireLogin($this->getRequest(), 'Environment Checker', $permission, false);
         }
 
         // We allow access to this controller regardless of live-status or ADMIN permission only