diff --git a/airflow/api_fastapi/core_api/routes/public/task_instances.py b/airflow/api_fastapi/core_api/routes/public/task_instances.py
index 6f89dc9ad974..75b34e2cc3e2 100644
--- a/airflow/api_fastapi/core_api/routes/public/task_instances.py
+++ b/airflow/api_fastapi/core_api/routes/public/task_instances.py
@@ -91,7 +91,7 @@ def get_task_instance(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_mapped_task_instances(
+def get_mapped_task_instances(
     dag_id: str,
     dag_run_id: str,
     task_id: str,
@@ -184,7 +184,7 @@ async def get_mapped_task_instances(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_task_instance_dependencies(
+def get_task_instance_dependencies(
     dag_id: str,
     dag_run_id: str,
     task_id: str,
@@ -267,7 +267,7 @@ def get_mapped_task_instance(
         [status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN, status.HTTP_404_NOT_FOUND]
     ),
 )
-async def get_task_instances(
+def get_task_instances(
     dag_id: str,
     dag_run_id: str,
     request: Request,