diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index 6ba7b6b8c24..d25de3f6ab4 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -456,7 +456,7 @@ class Task(models.Model):
     legend_done = fields.Char(related='stage_id.legend_done', string='Kanban Valid Explanation', readonly=True, related_sudo=False)
     legend_normal = fields.Char(related='stage_id.legend_normal', string='Kanban Ongoing Explanation', readonly=True, related_sudo=False)
     parent_id = fields.Many2one('project.task', string='Parent Task', index=True)
-    child_ids = fields.One2many('project.task', 'parent_id', string="Sub-tasks")
+    child_ids = fields.One2many('project.task', 'parent_id', string="Sub-tasks", context={'active_test': False})
     subtask_project_id = fields.Many2one('project.project', related="project_id.subtask_project_id", string='Sub-task Project', readonly=True)
     subtask_count = fields.Integer(compute='_compute_subtask_count', type='integer', string="Sub-task count")
     email_from = fields.Char(string='Email', help="These people will receive email.", index=True)