diff --git a/classes/local/controllers/maintenance_static_page_io.php b/classes/local/controllers/maintenance_static_page_io.php
index 3dcc72f..3639c14 100644
--- a/classes/local/controllers/maintenance_static_page_io.php
+++ b/classes/local/controllers/maintenance_static_page_io.php
@@ -25,6 +25,7 @@
 
 namespace auth_outage\local\controllers;
 
+use auth_outage\local\outagelib;
 use coding_exception;
 use finfo;
 use invalid_parameter_exception;
@@ -62,24 +63,18 @@ class maintenance_static_page_io {
         }
 
         if (self::is_url($file)) {
-            $curl = curl_init();
-            curl_setopt($curl, CURLOPT_URL, $file);
-            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
-            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
-            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
-            $contents = curl_exec($curl);
-            $mime = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
-            curl_close($curl);
+            $result = outagelib::fetch_page($file);
         } else {
-            $contents = @file_get_contents($file);
-            $mime = (new finfo(FILEINFO_MIME_TYPE))->buffer($contents); // Not perfect, but try guessing it.
+            $result = ['contents' => @file_get_contents($file)];
+            $result['mime'] = (new finfo(FILEINFO_MIME_TYPE))
+                ->buffer($result['contents']); // Not perfect, but try guessing it.
         }
-        if ($contents === false) {
+
+        if ($result['contents'] === false) {
             debugging('Cannot fetch: '.$file);
-            $contents = '';
-            $mime = 'unknown';
+            $result = ['contents' => '', 'mime' => 'unknown'];
         }
-        return ['contents' => $contents, 'mime' => $mime];
+        return $result;
     }
 
     /** @var bool */
diff --git a/classes/local/outagelib.php b/classes/local/outagelib.php
index 5dcf77d..dbea92f 100644
--- a/classes/local/outagelib.php
+++ b/classes/local/outagelib.php
@@ -52,6 +52,18 @@ class outagelib {
      */
     private static $injectcalled = false;
 
+    public static function fetch_page($file) {
+        $curl = curl_init();
+        curl_setopt($curl, CURLOPT_URL, $file);
+        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
+        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
+        $contents = curl_exec($curl);
+        $mime = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
+        curl_close($curl);
+        return compact('contents', 'mime');
+    }
+
     /**
      * Calls inject even if it was already called before.
      */
@@ -154,9 +166,14 @@ class outagelib {
         self::update_maintenance_later($outage);
     }
 
+    private static function check_wwwroot_accessible() {
+        global $CFG;
+        $result = self::fetch_page($CFG->wwwroot);
+        return (!empty($result['contents']));
+    }
+
     /**
      * Calls Moodle API - set_maintenance_later() to set when the next outage starts.
-     *
      * @param outage|null $outage Outage or null if no scheduled outage.
      */
     private static function update_maintenance_later($outage) {
@@ -316,6 +333,10 @@ EOT;
             $message[] = get_string('configurationdisabled', 'auth_outage');
         }
 
+        if (!self::check_wwwroot_accessible()) {
+            $message[] = get_string('configurationinaccessiblewwwroot', 'auth_outage', ['wwwroot' => $CFG->wwwroot]);
+        }
+
         if (count($message) == 0) {
             return '';
         }
diff --git a/lang/en/auth_outage.php b/lang/en/auth_outage.php
index b6ca9da..7cd3d5e 100644
--- a/lang/en/auth_outage.php
+++ b/lang/en/auth_outage.php
@@ -61,6 +61,7 @@ $string['clioutagecreated'] = 'Outage created, id: {$a->id}';
 $string['clone'] = 'Clone';
 $string['configurationwarning'] = 'The outage plugin is not properly configured, please refer to <a href="https://github.com/catalyst/moodle-auth_outage/blob/master/README.md#installation" target="_blank">README.md</a> for more information.';
 $string['configurationdisabled'] = 'The authentication plugin \'Outage\' is disabled. Please enable it in the site administration it and try again.';
+$string['configurationinaccessiblewwwroot'] = 'Could not access <b>{$a->wwwroot}</b> from the server, creation of outages may fail.';
 $string['datetimeformat'] = '%a %d %h %Y at %I:%M%P %Z';
 $string['defaultlayoutcss'] = 'Layout CSS';
 $string['defaultlayoutcssdescription'] = 'This CSS code can be used to override the Outage Warning Bar CSS.';
diff --git a/tests/phpunit/form/forms_test.php b/tests/phpunit/form/forms_test.php
index 8e33fb7..c7d2b2e 100644
--- a/tests/phpunit/form/forms_test.php
+++ b/tests/phpunit/form/forms_test.php
@@ -58,7 +58,7 @@ class forms_test extends auth_outage_base_testcase {
      * Mock some data and check values.
      */
     public function test_edit_valid() {
-        if ($this->skip_because_moodle_is_below_30()) {
+        if ($this->skip_because_moodle_is_below_30('Moodle POST mocking was fixed in Moodle 30.')) {
             return;
         }
 
@@ -79,7 +79,7 @@ class forms_test extends auth_outage_base_testcase {
      * Check invalid warning duration.
      */
     public function test_edit_invalid_warning() {
-        if ($this->skip_because_moodle_is_below_30()) {
+        if ($this->skip_because_moodle_is_below_30('Moodle POST mocking was fixed in Moodle 30.')) {
             return;
         }
 
@@ -94,7 +94,7 @@ class forms_test extends auth_outage_base_testcase {
      * Check invalid outage duration.
      */
     public function test_edit_invalid_duration() {
-        if ($this->skip_because_moodle_is_below_30()) {
+        if ($this->skip_because_moodle_is_below_30('Moodle POST mocking was fixed in Moodle 30.')) {
             return;
         }
 
@@ -108,7 +108,7 @@ class forms_test extends auth_outage_base_testcase {
      * Check invalid title (empty).
      */
     public function test_edit_invalid_title() {
-        if ($this->skip_because_moodle_is_below_30()) {
+        if ($this->skip_because_moodle_is_below_30('Moodle POST mocking was fixed in Moodle 30.')) {
             return;
         }
 
@@ -122,7 +122,7 @@ class forms_test extends auth_outage_base_testcase {
      * Check invalid title (too long).
      */
     public function test_edit_invalid_title_toolong() {
-        if ($this->skip_because_moodle_is_below_30()) {
+        if ($this->skip_because_moodle_is_below_30('Moodle POST mocking was fixed in Moodle 30.')) {
             return;
         }
 
@@ -138,7 +138,7 @@ class forms_test extends auth_outage_base_testcase {
      * Check invalid format for description.
      */
     public function test_edit_description_invalid_format() {
-        if ($this->skip_because_moodle_is_below_30()) {
+        if ($this->skip_because_moodle_is_below_30('Moodle POST mocking was fixed in Moodle 30.')) {
             return;
         }
 
@@ -198,13 +198,13 @@ class forms_test extends auth_outage_base_testcase {
         ];
     }
 
-    private function skip_because_moodle_is_below_30() {
+    private function skip_because_moodle_is_below_30($reason = '') {
         global $CFG;
 
         // The bugfix MDL-56250 in only applies to Moodle 30+.
         // Before that the form validation test is meaningless (results are cached), so skip it.
         if ($CFG->branch < 30) {
-            $this->markTestSkipped();
+            $this->markTestSkipped('Some tests can only run in Moodle 30+. '.$reason);
             return true;
         }