diff --git a/reportbuilder/classes/local/helpers/schedule.php b/reportbuilder/classes/local/helpers/schedule.php
index 9809bc354c7..dd61418559d 100644
--- a/reportbuilder/classes/local/helpers/schedule.php
+++ b/reportbuilder/classes/local/helpers/schedule.php
@@ -44,13 +44,14 @@ class schedule {
      * Create report schedule, calculate when it should be next sent
      *
      * @param stdClass $data
+     * @param int|null $timenow Time to use as comparison against current date (defaults to current time)
      * @return model
      */
-    public static function create_schedule(stdClass $data): model {
+    public static function create_schedule(stdClass $data, ?int $timenow = null): model {
         $data->name = trim($data->name);
 
         $schedule = (new model(0, $data));
-        $schedule->set('timenextsend', self::calculate_next_send_time($schedule));
+        $schedule->set('timenextsend', self::calculate_next_send_time($schedule, $timenow));
 
         return $schedule->create();
     }
@@ -229,7 +230,7 @@ class schedule {
      * returned value is after the current date
      *
      * @param model $schedule
-     * @param int|null $timenow Time to use for calculation (defaults to current time)
+     * @param int|null $timenow Time to use as comparison against current date (defaults to current time)
      * @return int
      */
     public static function calculate_next_send_time(model $schedule, ?int $timenow = null): int {
diff --git a/reportbuilder/tests/generator/lib.php b/reportbuilder/tests/generator/lib.php
index 79aae314a57..dd95d89a5e0 100644
--- a/reportbuilder/tests/generator/lib.php
+++ b/reportbuilder/tests/generator/lib.php
@@ -198,6 +198,9 @@ class core_reportbuilder_generator extends component_generator_base {
             $record['timescheduled'] = usergetmidnight(time() + DAYSECS);
         }
 
-        return schedule_helper::create_schedule((object) $record);
+        // Time to use as comparison against current date (null means current time).
+        $timenow = $record['timenow'] ?? null;
+
+        return schedule_helper::create_schedule((object) $record, $timenow);
     }
 }
diff --git a/reportbuilder/tests/local/helpers/schedule_test.php b/reportbuilder/tests/local/helpers/schedule_test.php
index c45c942e374..c1d9451e6ef 100644
--- a/reportbuilder/tests/local/helpers/schedule_test.php
+++ b/reportbuilder/tests/local/helpers/schedule_test.php
@@ -404,6 +404,7 @@ class schedule_test extends advanced_testcase {
             'name' => 'My schedule',
             'recurrence' => $recurrence,
             'timescheduled' => $timescheduled,
+            'timenow' => $timenow,
         ]);
 
         $this->assertEquals($expected, schedule::calculate_next_send_time($schedule, $timenow));
diff --git a/reportbuilder/upgrade.txt b/reportbuilder/upgrade.txt
index fa85716772e..58d71093128 100644
--- a/reportbuilder/upgrade.txt
+++ b/reportbuilder/upgrade.txt
@@ -1,6 +1,11 @@
 This file describes API changes in /reportbuilder/*
 Information provided here is intended especially for developers.
 
+=== 4.0.7 ===
+
+* The schedule helper `create_schedule` method accepts a `$timenow` parameter to use for comparisons against current date
+  during tests
+
 === 4.0.6 ===
 
 * The `datasource_stress_test_columns` test helper now enables sorting on those columns that support it