Try to fix IPv6 test

tests/plugins_tests/certificate_info/test_certificate_info_plugin.py

@@ -10,6 +10,8 @@
 from tests.openssl_server import ModernOpenSslServer, ClientAuthConfigEnum
 import pytest
 
+from tests.server_connectivity_tests.test_direct_connection import is_ipv6_available
+
 
 class TestCertificateInfoPlugin:
     def test_ca_file_bad_file(self):
@@ -190,9 +192,10 @@ def test_multiple_certificates(self):
         # And multiple certificates were detected
         assert len(plugin_result.certificate_deployments) > 1
 
+    @pytest.mark.skipif(not is_ipv6_available(), reason="IPv6 not available")
     def test_ipv6_server_string(self):
-        # Given a server to scan for which SSLyze only received an IPv6 address
         # Test for https://github.com/nabla-c0d3/sslyze/issues/675
+         # Given a server to scan for which SSLyze only received an IPv6 address
         server_location = ServerNetworkLocation("2a00:1450:4007:80d::200e", 443, ip_address="2a00:1450:4007:80d::200e")
         server_info = check_connectivity_to_server_and_return_info(server_location)
 

tests/server_connectivity_tests/test_direct_connection.py

@@ -16,7 +16,7 @@
 from tests.markers import can_only_run_on_linux_64
 
 
-def _is_ipv6_available() -> bool:
+def is_ipv6_available() -> bool:
     has_ipv6 = False
     s = socket.socket(socket.AF_INET6)
     try:
@@ -103,7 +103,7 @@ def test_tls_1_only(self):
         # And it detected that only TLS 1.0 is supported
         assert tls_probing_result.highest_tls_version_supported == TlsVersionEnum.TLS_1_0
 
-    @pytest.mark.skipif(not _is_ipv6_available(), reason="IPv6 not available")
+    @pytest.mark.skipif(not is_ipv6_available(), reason="IPv6 not available")
     def test_ipv6(self):
         # Given a server accessible via IPv6
         server_location = ServerNetworkLocation(