diff --git a/admin/tool/recyclebin/tests/course_bin_test.php b/admin/tool/recyclebin/tests/course_bin_test.php
index 965441bd3d6..60cf0d5ead7 100644
--- a/admin/tool/recyclebin/tests/course_bin_test.php
+++ b/admin/tool/recyclebin/tests/course_bin_test.php
@@ -67,9 +67,6 @@ final class course_bin_test extends \advanced_testcase {
         // Delete the course module.
         course_delete_module($this->quiz->cmid);
 
-        // Now, run the course module deletion adhoc task.
-        \phpunit_util::run_all_adhoc_tasks();
-
         // Check the course module is now in the recycle bin.
         $this->assertEquals(1, $DB->count_records('tool_recyclebin_course'));
 
@@ -111,9 +108,6 @@ final class course_bin_test extends \advanced_testcase {
         // Delete the course module.
         course_delete_module($this->quiz->cmid);
 
-        // Now, run the course module deletion adhoc task.
-        \phpunit_util::run_all_adhoc_tasks();
-
         // Try purging.
         $recyclebin = new \tool_recyclebin\course_bin($this->course->id);
         foreach ($recyclebin->get_items() as $item) {
@@ -136,9 +130,6 @@ final class course_bin_test extends \advanced_testcase {
         // Delete the quiz.
         course_delete_module($this->quiz->cmid);
 
-        // Now, run the course module deletion adhoc task.
-        \phpunit_util::run_all_adhoc_tasks();
-
         // Set deleted date to the distant past.
         $recyclebin = new \tool_recyclebin\course_bin($this->course->id);
         foreach ($recyclebin->get_items() as $item) {
@@ -152,9 +143,6 @@ final class course_bin_test extends \advanced_testcase {
 
         course_delete_module($book->cmid);
 
-        // Now, run the course module deletion adhoc task.
-        \phpunit_util::run_all_adhoc_tasks();
-
         // Should have 2 items now.
         $this->assertEquals(2, count($recyclebin->get_items()));
 
@@ -224,7 +212,6 @@ final class course_bin_test extends \advanced_testcase {
         // Delete quiz.
         $cm = get_coursemodule_from_instance('quiz', $this->quiz->id);
         course_delete_module($cm->id);
-        \phpunit_util::run_all_adhoc_tasks();
         $quizzes = get_coursemodules_in_course('quiz', $this->course->id);
         $this->assertEquals(0, count($quizzes));
 
@@ -261,9 +248,6 @@ final class course_bin_test extends \advanced_testcase {
         // Delete the course module.
         course_delete_module($this->quiz->cmid);
 
-        // Now, run the course module deletion adhoc task.
-        \phpunit_util::run_all_adhoc_tasks();
-
         // Check there is no items in the recycle bin.
         $recyclebin = new \tool_recyclebin\course_bin($this->course->id);
         $this->assertEquals(0, count($recyclebin->get_items()));
@@ -294,7 +278,6 @@ final class course_bin_test extends \advanced_testcase {
         // Delete quiz.
         $cm = get_coursemodule_from_instance('quiz', $this->quiz->id);
         course_delete_module($cm->id);
-        \phpunit_util::run_all_adhoc_tasks();
         $quizzes = get_coursemodules_in_course('quiz', $this->course->id);
         $this->assertEquals(0, count($quizzes));