diff --git a/tests/components/conftest.py b/tests/components/conftest.py
index dd6776a1cad..cf10e2b8dfd 100644
--- a/tests/components/conftest.py
+++ b/tests/components/conftest.py
@@ -624,7 +624,8 @@ async def _validate_translation(
     if not translation_required:
         return
 
-    if full_key in translation_errors:
+    if translation_errors.get(full_key) in {"used", "unused"}:
+        # This translation key is in the ignore list, mark it as used
         translation_errors[full_key] = "used"
         return
 
@@ -864,6 +865,7 @@ async def check_translations(
     if not isinstance(ignore_translations, list):
         ignore_translations = [ignore_translations]
 
+    # Set all ignored translation keys to "unused"
     translation_errors = {k: "unused" for k in ignore_translations}
 
     translation_coros = set()
@@ -945,10 +947,11 @@ async def check_translations(
     # Run final checks
     unused_ignore = [k for k, v in translation_errors.items() if v == "unused"]
     if unused_ignore:
+        # Some ignored translations were not used
         pytest.fail(
             f"Unused ignore translations: {', '.join(unused_ignore)}. "
             "Please remove them from the ignore_translations fixture."
         )
     for description in translation_errors.values():
-        if description not in {"used", "unused"}:
+        if description != "used":
             pytest.fail(description)
diff --git a/tests/components/websocket_api/test_commands.py b/tests/components/websocket_api/test_commands.py
index 2ddb5c628c7..baa939c411b 100644
--- a/tests/components/websocket_api/test_commands.py
+++ b/tests/components/websocket_api/test_commands.py
@@ -540,6 +540,10 @@ async def test_call_service_schema_validation_error(
     assert len(calls) == 0
 
 
+@pytest.mark.parametrize(
+    "ignore_translations",
+    ["component.test.exceptions.custom_error.message"],
+)
 async def test_call_service_error(
     hass: HomeAssistant, websocket_client: MockHAClientWebSocket
 ) -> None: