diff --git a/homeassistant/components/automation/__init__.py b/homeassistant/components/automation/__init__.py
index 4d2cbcc94d2..3cbb98d85bd 100644
--- a/homeassistant/components/automation/__init__.py
+++ b/homeassistant/components/automation/__init__.py
@@ -35,7 +35,7 @@ from homeassistant.helpers.script import (
     ATTR_MAX,
     ATTR_MODE,
     CONF_MAX,
-    SCRIPT_MODE_PARALLEL,
+    SCRIPT_MODE_SINGLE,
     Script,
     make_script_schema,
 )
@@ -118,7 +118,7 @@ PLATFORM_SCHEMA = vol.All(
             vol.Optional(CONF_CONDITION): _CONDITION_SCHEMA,
             vol.Required(CONF_ACTION): cv.SCRIPT_SCHEMA,
         },
-        SCRIPT_MODE_PARALLEL,
+        SCRIPT_MODE_SINGLE,
     ),
 )
 
diff --git a/tests/components/automation/test_numeric_state.py b/tests/components/automation/test_numeric_state.py
index 11a4477f658..e4180ad2e6c 100644
--- a/tests/components/automation/test_numeric_state.py
+++ b/tests/components/automation/test_numeric_state.py
@@ -853,7 +853,7 @@ async def test_if_not_fires_on_entities_change_with_for_after_stop(hass, calls):
     await hass.async_block_till_done()
     async_fire_time_changed(hass, dt_util.utcnow() + timedelta(seconds=10))
     await hass.async_block_till_done()
-    assert len(calls) == 2
+    assert len(calls) == 1
 
     hass.states.async_set("test.entity_1", 15)
     hass.states.async_set("test.entity_2", 15)
@@ -866,7 +866,7 @@ async def test_if_not_fires_on_entities_change_with_for_after_stop(hass, calls):
 
     async_fire_time_changed(hass, dt_util.utcnow() + timedelta(seconds=10))
     await hass.async_block_till_done()
-    assert len(calls) == 2
+    assert len(calls) == 1
 
 
 async def test_if_fires_on_entity_change_with_for_attribute_change(hass, calls):
diff --git a/tests/components/automation/test_state.py b/tests/components/automation/test_state.py
index 18a2750cb50..13165da8488 100644
--- a/tests/components/automation/test_state.py
+++ b/tests/components/automation/test_state.py
@@ -404,7 +404,7 @@ async def test_if_not_fires_on_entities_change_with_for_after_stop(hass, calls):
     await hass.async_block_till_done()
     async_fire_time_changed(hass, dt_util.utcnow() + timedelta(seconds=10))
     await hass.async_block_till_done()
-    assert len(calls) == 2
+    assert len(calls) == 1
 
     hass.states.async_set("test.entity_1", "world_no")
     hass.states.async_set("test.entity_2", "world_no")
@@ -417,7 +417,7 @@ async def test_if_not_fires_on_entities_change_with_for_after_stop(hass, calls):
 
     async_fire_time_changed(hass, dt_util.utcnow() + timedelta(seconds=10))
     await hass.async_block_till_done()
-    assert len(calls) == 2
+    assert len(calls) == 1
 
 
 async def test_if_fires_on_entity_change_with_for_attribute_change(hass, calls):