diff --git a/tests/hghave.py b/tests/hghave.py
--- a/tests/hghave.py
+++ b/tests/hghave.py
@@ -543,7 +543,7 @@ def has_defaultcacertsloaded():
 @check("tls1.2", "TLS 1.2 protocol support")
 def has_tls1_2():
     from mercurial import sslutil
-    return 'tls1.2' in sslutil.supportedprotocols
+    return b'tls1.2' in sslutil.supportedprotocols
 
 @check("windows", "Windows")
 def has_windows():