2 files changed, 14 insertions, 0 deletions
diff --git a/Lib/test/test_asyncio/test_base_events.py b/Lib/test/test_asyncio/test_base_events.py
index 8566a9d..11e9465 100644
--- a/Lib/test/test_asyncio/test_base_events.py
+++ b/Lib/test/test_asyncio/test_base_events.py
@@ -1818,12 +1818,15 @@ class BaseLoopSockSendfileTests(test_utils.TestCase):
 
     @classmethod
     def setUpClass(cls):
+        cls.__old_bufsize = constants.SENDFILE_FALLBACK_READBUFFER_SIZE
+        constants.SENDFILE_FALLBACK_READBUFFER_SIZE = 1024 * 16
         with open(support.TESTFN, 'wb') as fp:
             fp.write(cls.DATA)
         super().setUpClass()
 
     @classmethod
     def tearDownClass(cls):
+        constants.SENDFILE_FALLBACK_READBUFFER_SIZE = cls.__old_bufsize
         support.unlink(support.TESTFN)
         super().tearDownClass()
 
diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index 39d85e8..e7c4fa6 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -2160,6 +2160,17 @@ class SockSendfileMixin(SendfileBase):
         async def wait_closed(self):
             await self.fut
 
+    @classmethod
+    def setUpClass(cls):
+        cls.__old_bufsize = constants.SENDFILE_FALLBACK_READBUFFER_SIZE
+        constants.SENDFILE_FALLBACK_READBUFFER_SIZE = 1024 * 16
+        super().setUpClass()
+
+    @classmethod
+    def tearDownClass(cls):
+        constants.SENDFILE_FALLBACK_READBUFFER_SIZE = cls.__old_bufsize
+        super().tearDownClass()
+
     def set_socket_opts(self, sock):
         # On macOS, SO_SNDBUF is reset by connect(). So this method
         # should be called after the socket is connected.