diff -r 65f437c240f2 -r 521ac0d7047f mercurial/sslutil.py
--- a/mercurial/sslutil.py	Fri Mar 12 17:22:35 2021 -0500
+++ b/mercurial/sslutil.py	Sat Mar 13 00:38:59 2021 -0500
@@ -269,7 +269,7 @@
 
     if b'SSLKEYLOGFILE' in encoding.environ:
         try:
-            import sslkeylog
+            import sslkeylog  # pytype: disable=import-error
 
             sslkeylog.set_keylog(
                 pycompat.fsdecode(encoding.environ[b'SSLKEYLOGFILE'])