diff --git a/enrol/tests/enrollib_test.php b/enrol/tests/enrollib_test.php
index c7c39af7a41..ce998fc46ab 100644
--- a/enrol/tests/enrollib_test.php
+++ b/enrol/tests/enrollib_test.php
@@ -43,6 +43,9 @@ final class enrollib_test extends advanced_testcase {
 
         $this->resetAfterTest();
 
+        // Use a mock incrementing clock to ensure deterministic and testable time values.
+        $clock = $this->mock_clock_with_incrementing(1750000000);
+
         $studentrole = $DB->get_record('role', array('shortname'=>'student'));
         $this->assertNotEmpty($studentrole);
         $teacherrole = $DB->get_record('role', array('shortname'=>'teacher'));
@@ -96,13 +99,14 @@ final class enrollib_test extends advanced_testcase {
 
         $manual->enrol_user($maninstance2, $user1->id);
         $manual->enrol_user($maninstance2, $user2->id);
-        $manual->enrol_user($maninstance2, $user3->id, 0, 1, time()+(60*60));
+        $manual->enrol_user($maninstance2, $user3->id, 0, 1, $clock->time() + HOURSECS);
 
         $manual->enrol_user($maninstance3, $user1->id);
         $manual->enrol_user($maninstance3, $user2->id);
-        $manual->enrol_user($maninstance3, $user3->id, 0, 1, time()-(60*60));
+        $manual->enrol_user($maninstance3, $user3->id, 0, 1, $clock->time() - HOURSECS);
         $manual->enrol_user($maninstance3, $user4->id, 0, 0, 0, ENROL_USER_SUSPENDED);
 
+        $manual->enrol_user($maninstance4, $user5->id, 0, $clock->time());
 
         $courses = enrol_get_all_users_courses($CFG->siteguest);
         $this->assertSame(array(), $courses);
@@ -152,6 +156,10 @@ final class enrollib_test extends advanced_testcase {
         $this->assertCount(0, $courses);
         $this->assertEquals(array(), array_keys($courses));
 
+        $courses = enrol_get_all_users_courses($user5->id, true);
+        $this->assertCount(1, $courses);
+        $this->assertEquals([$course4->id], array_keys($courses));
+
         // Make sure sorting and columns work.
 
         $basefields = array('id', 'category', 'sortorder', 'shortname', 'fullname', 'idnumber',
diff --git a/lib/enrollib.php b/lib/enrollib.php
index 1a4d05aa9c1..c7014a585fe 100644
--- a/lib/enrollib.php
+++ b/lib/enrollib.php
@@ -1111,8 +1111,7 @@ function enrol_get_all_users_courses($userid, $onlyactive = false, $fields = nul
 
     if ($onlyactive) {
         $subwhere = "WHERE ue.status = :active AND e.status = :enabled AND ue.timestart < :now1 AND (ue.timeend = 0 OR ue.timeend > :now2)";
-        $params['now1']    = round(time(), -2); // improves db caching
-        $params['now2']    = $params['now1'];
+        $params['now1']    = $params['now2'] = \core\di::get(\core\clock::class)->time();
         $params['active']  = ENROL_USER_ACTIVE;
         $params['enabled'] = ENROL_INSTANCE_ENABLED;
     } else {