diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index b274b9b..1dc5952 100644
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -95,7 +95,7 @@
 
         None is returned when called not in the context of a Task.
         """
-        warnings.warn("Task.current_task() is deprecated, "
+        warnings.warn("Task.current_task() is deprecated since Python 3.7, "
                       "use asyncio.current_task() instead",
                       DeprecationWarning,
                       stacklevel=2)
@@ -109,7 +109,7 @@
 
         By default all tasks for the current event loop are returned.
         """
-        warnings.warn("Task.all_tasks() is deprecated, "
+        warnings.warn("Task.all_tasks() is deprecated since Python 3.7, "
                       "use asyncio.all_tasks() instead",
                       DeprecationWarning,
                       stacklevel=2)
@@ -388,8 +388,8 @@
     if loop is None:
         loop = events.get_running_loop()
     else:
-        warnings.warn("The loop argument is deprecated and scheduled for "
-                      "removal in Python 3.10.",
+        warnings.warn("The loop argument is deprecated since Python 3.8, "
+                      "and scheduled for removal in Python 3.10.",
                       DeprecationWarning, stacklevel=2)
 
     fs = {ensure_future(f, loop=loop) for f in set(fs)}
@@ -418,8 +418,8 @@
     if loop is None:
         loop = events.get_running_loop()
     else:
-        warnings.warn("The loop argument is deprecated and scheduled for "
-                      "removal in Python 3.10.",
+        warnings.warn("The loop argument is deprecated since Python 3.8, "
+                      "and scheduled for removal in Python 3.10.",
                       DeprecationWarning, stacklevel=2)
 
     if timeout is None:
@@ -600,8 +600,8 @@
     if loop is None:
         loop = events.get_running_loop()
     else:
-        warnings.warn("The loop argument is deprecated and scheduled for "
-                      "removal in Python 3.10.",
+        warnings.warn("The loop argument is deprecated since Python 3.8, "
+                      "and scheduled for removal in Python 3.10.",
                       DeprecationWarning, stacklevel=2)
 
     future = loop.create_future()