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    Fix cert tests for Python 3.14
    
 
    

    



 
    
 
    

  Review Request #15177
  —
  Created July 17, 2026 and updated 

 
    


    




    




    






 
    
  
    
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  release-9.x
 
    

    





    
 
 
    
  
 
    

    





    
 
 
    
  
 
    

    



 
    



 
    
  
    
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    Python 3.14 adds some stuff for ALPN protocols advertised in the SSL/TLS
    
handshake. These changes were causing test failures for a couple
    
reasons:
    

      

    • Internal Python code was expecting the SSL context object to implement
      
  a set_alpn_protocols method and have a post_handshake_auth
      
  attribute.
      • 

    • The extra ALPN handler was inflating the number of SSL contexts on a
      
  request by one, causing
      • 

    

    This change adds those APIs to our test context, and updates the urlopen
    
tests to filter out the ALPN context(s).
    
 
    

    





  

    
 
 
    
  
    Ran unit tests.
    
 
    

    




 
    

    





    
 
    




  
    
 
 
    
  


    
 
    
  
   
    

    Summary
    ID

   
    
      
  

   
    

    

     
    
      Fix cert tests for Python 3.14
      
    Python 3.14 adds some stuff for ALPN protocols advertised in the SSL/TLS
handshake. These changes were causing test failures for a couple
reasons:

- Internal Python code was expecting the SSL context object to implement
  a `set_alpn_protocols` method and have a `post_handshake_auth`
  attribute.
- The extra ALPN handler was inflating the number of SSL contexts on a
  request by one, causing

This change adds those APIs to our test context, and updates the urlopen
tests to filter out the ALPN context(s).

Testing Done:
Ran unit tests.
    
     
    

        		
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