diff --git a/custom_components/irrigation_unlimited/irrigation_unlimited.py b/custom_components/irrigation_unlimited/irrigation_unlimited.py
index e5d9f29..9500b9c 100644
--- a/custom_components/irrigation_unlimited/irrigation_unlimited.py
+++ b/custom_components/irrigation_unlimited/irrigation_unlimited.py
@@ -1642,6 +1642,7 @@ def service_manual_run(self, data: MappingProxyType, stime: datetime) -> None:
                 duration = self._duration
                 if duration is None:
                     return
+                duration = self._adjustment.adjust(duration)
             self._run_queue.add_manual(
                 self._controller.manual_run_start(stime),
                 duration,
diff --git a/tests/configs/service_manual_run.yaml b/tests/configs/service_manual_run.yaml
index ec5b150..e6470c0 100644
--- a/tests/configs/service_manual_run.yaml
+++ b/tests/configs/service_manual_run.yaml
@@ -100,7 +100,7 @@ irrigation_unlimited:
           - {t: '2021-01-04 08:16:00', c: 1, z: 1, s: 1}
           - {t: '2021-01-04 08:31:00', c: 1, z: 1, s: 0}
           - {t: '2021-01-04 08:32:00', c: 1, z: 0, s: 0}
-      - name: '10-Manual run with no time Zone 1'
+      - name: '10-Manual run with zero time Zone 1'
         start: '2021-01-04 08:00'
         end: '2021-01-04 09:00'
         results:
@@ -116,7 +116,7 @@ irrigation_unlimited:
           - {t: '2021-01-04 08:16:00', c: 1, z: 2, s: 1}
           - {t: '2021-01-04 08:26:00', c: 1, z: 2, s: 0}
           - {t: '2021-01-04 08:27:00', c: 1, z: 0, s: 0}
-      - name: '12-Manual run with no time Zone 2'
+      - name: '12-Manual run with zero time Zone 2'
         start: '2021-01-04 08:00'
         end: '2021-01-04 09:00'
         results:
@@ -128,6 +128,14 @@ irrigation_unlimited:
         start: '2021-01-04 08:00'
         end: '2021-01-04 09:00'
         results: []
+      - name: '14-Manual run with no time Zone 1 adjusted 50%'
+        start: '2021-01-04 08:00'
+        end: '2021-01-04 09:00'
+        results:
+          - {t: '2021-01-04 08:15:00', c: 1, z: 0, s: 1}
+          - {t: '2021-01-04 08:16:00', c: 1, z: 1, s: 1}
+          - {t: '2021-01-04 08:23:30', c: 1, z: 1, s: 0}
+          - {t: '2021-01-04 08:24:30', c: 1, z: 0, s: 0}
   controllers:
     - name: "Test controller 1"
       preamble: "00:01"
diff --git a/tests/test_service.py b/tests/test_service.py
index fb75e2e..7df30e5 100644
--- a/tests/test_service.py
+++ b/tests/test_service.py
@@ -721,6 +721,23 @@ async def test_service_manual_run(
         )
         await exam.finish_test()
 
+        await exam.begin_test(14)
+        await exam.call(
+            SERVICE_TIME_ADJUST,
+            {"entity_id": "binary_sensor.irrigation_unlimited_c1_z1", "percentage": 50},
+        )
+        await exam.run_until("2021-01-04 08:14:59")
+        await exam.call(
+            SERVICE_MANUAL_RUN,
+            {"entity_id": "binary_sensor.irrigation_unlimited_c1_z1"},
+        )
+        await exam.run_until("2021-01-04 08:30:00")
+        await exam.call(
+            SERVICE_TIME_ADJUST,
+            {"entity_id": "binary_sensor.irrigation_unlimited_c1_z1", "reset": None},
+        )
+        await exam.finish_test()
+
         exam.check_summary()