diff --git a/OpenSSL/test/test_ssl.py b/OpenSSL/test/test_ssl.py
index ecee95f72774..a6f0127ffb0e 100644
--- a/OpenSSL/test/test_ssl.py
+++ b/OpenSSL/test/test_ssl.py
@@ -1912,8 +1912,8 @@ def test_wantWriteError(self):
         client_socket, server_socket = socket_pair()
         # Fill up the client's send buffer so Connection won't be able to write
         # anything.
-        msg = b"x" * 1024
-        for i in range(1024):
+        msg = b"x" * 512
+        for i in range(2048):
             try:
                 client_socket.send(msg)
             except error as e: