diff --git a/contentbank/classes/contenttype.php b/contentbank/classes/contenttype.php
index f6bd810d4e486..b2c04e30ae8e6 100644
--- a/contentbank/classes/contenttype.php
+++ b/contentbank/classes/contenttype.php
@@ -14,14 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * Content type manager class
- *
- * @package    core_contentbank
- * @copyright  2020 Amaia Anabitarte <amaia@moodle.com>
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
 namespace core_contentbank;
 
 use core\event\contentbank_content_created;
@@ -286,7 +278,7 @@ public function get_download_url(content $content): string {
      */
     public function get_icon(content $content): string {
         global $OUTPUT;
-        return $OUTPUT->image_url('f/unknown-64', 'moodle')->out(false);
+        return $OUTPUT->image_url('f/unknown')->out(false);
     }
 
     /**
diff --git a/contentbank/tests/contenttype_test.php b/contentbank/tests/contenttype_test.php
index b6a9b82cbd410..ec53ef67f4af4 100644
--- a/contentbank/tests/contenttype_test.php
+++ b/contentbank/tests/contenttype_test.php
@@ -14,15 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * Test for content bank contenttype class.
- *
- * @package    core_contentbank
- * @category   test
- * @copyright  2020 Amaia Anabitarte <amaia@moodle.com>
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
 namespace core_contentbank;
 
 use stdClass;
@@ -104,6 +95,8 @@ public function test_get_plugin_name() {
      * @covers ::get_icon
      */
     public function test_get_icon() {
+        global $CFG;
+
         $this->resetAfterTest();
 
         $systemcontext = \context_system::instance();
@@ -111,8 +104,10 @@ public function test_get_icon() {
         $record = new stdClass();
         $record->name = 'New content';
         $content = $testable->create_content($record);
-        $icon = $testable->get_icon($content);
-        $this->assertStringContainsString('archive', $icon);
+        $this->assertEquals(
+            "{$CFG->wwwroot}/theme/image.php/boost/core/1/f/unknown",
+            $testable->get_icon($content),
+        );
     }
 
     /**
diff --git a/contentbank/tests/fixtures/testable_contenttype.php b/contentbank/tests/fixtures/testable_contenttype.php
index 2bb242e06c77e..e74518e37a88e 100644
--- a/contentbank/tests/fixtures/testable_contenttype.php
+++ b/contentbank/tests/fixtures/testable_contenttype.php
@@ -14,15 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * Testable contenttype plugin class.
- *
- * @package    core_contentbank
- * @category   test
- * @copyright  2020 Sara Arjona <sara@moodle.com>
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
 namespace contenttype_testable;
 
 /**
@@ -40,18 +31,6 @@ class contenttype extends \core_contentbank\contenttype {
     /** @var array Additional features for testing */
     public static $featurestotest;
 
-    /**
-     * Returns the HTML code to render the icon for content bank contents.
-     *
-     * @param  content $content The content to delete.
-     * @return string               HTML code to render the icon
-     */
-    public function get_icon(\core_contentbank\content $content): string {
-        global $OUTPUT;
-
-        return $OUTPUT->image_url('f/archive-64', 'moodle')->out(false);
-    }
-
     /**
      * Return an array of implemented features by this plugin.
      *