diff --git a/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py b/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py
index 5d187ec..27ef66d 100644
--- a/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py
+++ b/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py
@@ -44,3 +44,29 @@ def test_rate_applied_after_edit(self):
         line_record = self.env["account.analytic.line"].create(line)
         line_record.write({"time_start": 10.0, "time_stop": 12.0})
         self.assertEqual(line_record.unit_amount, 4.0)
+
+    def test_rate_not_double_applied(self):
+        line = self.base_line()
+        del line["time_start"]
+        del line["time_stop"]
+
+        # Emulating a transient record before it is actually created.
+        line_new = self.env["account.analytic.line"].new(line)
+        line_new.time_start = 10.0
+        line_new.time_stop = 12.0
+        self.assertEqual(line_new.unit_amount, 4.0)
+
+        # Prepare the transient data for writing to a new record.
+        #
+        # Annoyingly, the value for unit_amount is not in _cache, so we have to
+        # add it here.
+        #
+        # Ideally I would emulate this with a Form(), but the necessary fields
+        # are not available in a form. This is the closest emulation.
+        vals = line_new._convert_to_write(line_new._cache)
+        vals.setdefault("unit_amount", line_new.unit_amount)
+        line_record = self.env["account.analytic.line"].create(vals)
+
+        # The rate was already applied on the transient record. Don't also apply
+        # it on creation.
+        self.assertEqual(line_record.unit_amount, 4.0)