diff --git a/tobiko/shell/ssh/_config.py b/tobiko/shell/ssh/_config.py
index 8e7f7e6bc..a285c4a99 100644
--- a/tobiko/shell/ssh/_config.py
+++ b/tobiko/shell/ssh/_config.py
@@ -82,7 +82,10 @@ class SSHConfigFixture(tobiko.SharedFixture):
     def lookup(self, host=None):
         host_config = host and self.config.lookup(host) or {}
         # remove unsupported directive
-        host_config.pop('include', None)
+        include_files = host_config.pop('include', None)
+        if include_files:
+            LOG.warning('Ignoring unsupported directive: Include %s',
+                        include_files)
         return SSHHostConfig(host=host,
                              ssh_config=self,
                              host_config=host_config,
diff --git a/tobiko/tests/unit/shell/test_ssh.py b/tobiko/tests/unit/shell/test_ssh.py
index bda127796..52440d75c 100644
--- a/tobiko/tests/unit/shell/test_ssh.py
+++ b/tobiko/tests/unit/shell/test_ssh.py
@@ -62,6 +62,7 @@ class SSHClientFixtureTest(unit.TobikoUnitTest):
                 with open(ssh_config_file) as f:
                     ssh_config.parse(f)
         expected_host_config = ssh_config.lookup(fixture.host)
+        expected_host_config.pop('include', None)
         self.assertEqual(fixture.host, fixture.host_config.host)
         self.assertEqual(expected_host_config,
                          fixture.host_config.host_config)