diff --git a/homeassistant/components/websocket_api/commands.py b/homeassistant/components/websocket_api/commands.py
index cfa132b71eb..4a360b4a43c 100644
--- a/homeassistant/components/websocket_api/commands.py
+++ b/homeassistant/components/websocket_api/commands.py
@@ -275,10 +275,10 @@ async def handle_call_service(
                 translation_domain=const.DOMAIN,
                 translation_key="child_service_not_found",
                 translation_placeholders={
-                    "domain": err.domain,
-                    "service": err.service,
-                    "child_domain": msg["domain"],
-                    "child_service": msg["service"],
+                    "domain": msg["domain"],
+                    "service": msg["service"],
+                    "child_domain": err.domain,
+                    "child_service": err.service,
                 },
             )
     except vol.Invalid as err:
diff --git a/tests/components/websocket_api/test_commands.py b/tests/components/websocket_api/test_commands.py
index 22e839d84e4..2ddb5c628c7 100644
--- a/tests/components/websocket_api/test_commands.py
+++ b/tests/components/websocket_api/test_commands.py
@@ -460,10 +460,10 @@ async def test_call_service_child_not_found(
         "domain_test.test_service which was not found."
     )
     assert msg["error"]["translation_placeholders"] == {
-        "domain": "non",
-        "service": "existing",
-        "child_domain": "domain_test",
-        "child_service": "test_service",
+        "domain": "domain_test",
+        "service": "test_service",
+        "child_domain": "non",
+        "child_service": "existing",
     }
     assert msg["error"]["translation_key"] == "child_service_not_found"
     assert msg["error"]["translation_domain"] == "websocket_api"