[1.25] Fix testing of SSLKEYLOGFILE on AppVeyor

test/with_dummyserver/test_https.py

@@ -698,16 +698,10 @@ def test_tls_protocol_name_of_socket(self):
             finally:
                 conn.close()
 
-    @pytest.mark.skipif(
-        not hasattr(ssl.SSLContext, "keylog_filename"),
-        reason="requires OpenSSL 1.1.1+",
-    )
     @pytest.mark.skipif(sys.version_info < (3, 8), reason="requires python 3.8+")
-    @pytest.mark.skipif(
-        sys.platform == "win32",
-        reason="does not work reliably in Appveyor test enviroment for not yet known reasons",
-    )
     def test_sslkeylogfile(self, tmpdir, monkeypatch):
+        if not hasattr(util.SSLContext, "keylog_filename"):
+            pytest.skip("requires OpenSSL 1.1.1+")
         keylog_file = tmpdir.join("keylogfile.txt")
         monkeypatch.setenv("SSLKEYLOGFILE", str(keylog_file))
         with HTTPSConnectionPool(

test/with_dummyserver/test_socketlevel.py

@@ -10,8 +10,8 @@
     ProtocolError,
 )
 from urllib3.response import httplib
+from urllib3 import util
 from urllib3.util import ssl_wrap_socket
-from urllib3.util.ssl_ import HAS_SNI
 from urllib3.util import ssl_
 from urllib3.util.timeout import Timeout
 from urllib3.util.retry import Retry
@@ -87,8 +87,9 @@ def multicookie_response_handler(listener):
 
 
 class TestSNI(SocketDummyServerTestCase):
-    @pytest.mark.skipif(not HAS_SNI, reason="SNI-support not available")
     def test_hostname_in_first_request_packet(self):
+        if not util.HAS_SNI:
+            pytest.skip("SNI-support not available")
         done_receiving = Event()
         self.buf = b""