--- tests.py~	2024-02-29 12:22:56.007309853 +1100
+++ tests.py	2024-02-29 12:25:49.618057933 +1100
@@ -3,6 +3,7 @@
 
 """Automated tests"""
 
+import os.path
 import unittest
 from collections import OrderedDict
 
@@ -94,6 +95,7 @@
 
         self.assertEqual(len(results["warnings"]), 0)
 
+    @unittest.skipUnless(os.path.exists("/etc/resolv.conf"), "no network")
     def testSplitSPFRecord(self):
         """Split SPF records are parsed properly"""
 
@@ -129,6 +131,7 @@
         self.assertRaises(checkdmarc.spf.SPFRecordNotFound,
                           checkdmarc.spf.parse_spf_record, spf_record, domain)
 
+    @unittest.skipUnless(os.path.exists("/etc/resolv.conf"), "no network")
     def testTooManySPFDNSLookups(self):
         """SPF records with > 10 SPF mechanisms that cause DNS lookups raise
         SPFTooManyDNSLookups"""
@@ -144,6 +147,7 @@
         self.assertRaises(checkdmarc.spf.SPFTooManyDNSLookups,
                           checkdmarc.spf.parse_spf_record, spf_record, domain)
 
+    @unittest.skipUnless(os.path.exists("/etc/resolv.conf"), "no network")
     def testTooManySPFVoidDNSLookups(self):
         """SPF records with > 2 void DNS lookups"""
 
@@ -216,6 +220,7 @@
         self.assertRaises(checkdmarc.spf.SPFIncludeLoop,
                           checkdmarc.spf.parse_spf_record, spf_record, domain)
 
+    @unittest.skipUnless(os.path.exists("/etc/resolv.conf"), "no network")
     def testSPFMissingMXRecord(self):
         """A warning is issued if an SPF record contains a mx mechanism
         pointing to a domain that has no MX records"""
@@ -226,6 +231,7 @@
         self.assertIn("{0} does not have any MX records".format(domain),
                       results["warnings"])
 
+    @unittest.skipUnless(os.path.exists("/etc/resolv.conf"), "no network")
     def testSPFMissingARecord(self):
         """A warning is issued if an SPF record contains a mx mechanism
         pointing to a domain that has no A records"""
@@ -236,6 +242,7 @@
         self.assertIn("cardinalhealth.net does not have any A/AAAA records",
                       results["warnings"])
 
+    @unittest.skipUnless(os.path.exists("/etc/resolv.conf"), "no network")
     def testDMARCPctLessThan100Warning(self):
         """A warning is issued if the DMARC pvt value is less than 100"""