diff --git a/osc/core.py b/osc/core.py
index 5005a977..bda78ddf 100644
--- a/osc/core.py
+++ b/osc/core.py
@@ -8905,7 +8905,7 @@ def vc_export_env(apiurl: str, quiet=False):
 
     for (tag, envs) in tag2envs.items():
         env_present = [env for env in envs if env in os.environ]
-        config_present = tag in conf.config['api_host_options'][apiurl]
+        config_present = bool(conf.config['api_host_options'][apiurl].get(tag, None))
         if not env_present and not config_present:
             missing_tags.append(tag)
         elif config_present:
diff --git a/tests/test_vc.py b/tests/test_vc.py
new file mode 100644
index 00000000..491a677a
--- /dev/null
+++ b/tests/test_vc.py
@@ -0,0 +1,85 @@
+import importlib
+import os
+import unittest
+
+import osc.conf
+from osc.core import vc_export_env
+
+from .common import GET
+from .common import patch
+
+
+class TestVC(unittest.TestCase):
+    def setUp(self):
+        importlib.reload(osc.conf)
+
+        config = osc.conf.config
+        host_options = osc.conf.HostOptions(
+            config, apiurl="http://localhost", username="Admin"
+        )
+        config.api_host_options[host_options["apiurl"]] = host_options
+        config["apiurl"] = host_options["apiurl"]
+        self.host_options = host_options
+
+    def tearDown(self):
+        importlib.reload(osc.conf)
+
+    @patch.dict(os.environ, {}, clear=True)
+    def test_vc_export_env_conf(self):
+        self.host_options.realname = "<REALNAME>"
+        self.host_options.email = "<EMAIL>"
+        vc_export_env("http://localhost")
+        expected = {
+            "VC_REALNAME": "<REALNAME>",
+            "VC_MAILADDR": "<EMAIL>",
+            "mailaddr": "<EMAIL>",
+        }
+        self.assertEqual(os.environ, expected)
+
+    @patch.dict(os.environ, {}, clear=True)
+    @GET(
+        "http://localhost/person/Admin",
+        text="<person><login>Admin</login><email>root@localhost</email><realname>OBS Instance Superuser</realname></person>",
+    )
+    def test_vc_export_env_conf_realname(self):
+        self.host_options.realname = "<REALNAME>"
+        vc_export_env("http://localhost")
+        expected = {
+            "VC_REALNAME": "<REALNAME>",
+            "VC_MAILADDR": "root@localhost",
+            "mailaddr": "root@localhost",
+        }
+        self.assertEqual(os.environ, expected)
+
+    @patch.dict(os.environ, {}, clear=True)
+    @GET(
+        "http://localhost/person/Admin",
+        text="<person><login>Admin</login><email>root@localhost</email><realname>OBS Instance Superuser</realname></person>",
+    )
+    def test_vc_export_env_conf_email(self):
+        self.host_options.email = "<EMAIL>"
+        vc_export_env("http://localhost")
+        expected = {
+            "VC_REALNAME": "OBS Instance Superuser",
+            "VC_MAILADDR": "<EMAIL>",
+            "mailaddr": "<EMAIL>",
+        }
+        self.assertEqual(os.environ, expected)
+
+    @patch.dict(os.environ, {}, clear=True)
+    @GET(
+        "http://localhost/person/Admin",
+        text="<person><login>Admin</login><email>root@localhost</email><realname>OBS Instance Superuser</realname></person>",
+    )
+    def test_vc_export_env_api_call(self):
+        vc_export_env("http://localhost")
+        expected = {
+            "VC_REALNAME": "OBS Instance Superuser",
+            "VC_MAILADDR": "root@localhost",
+            "mailaddr": "root@localhost",
+        }
+        self.assertEqual(os.environ, expected)
+
+
+if __name__ == "__main__":
+    unittest.main()