diff --git a/src/glicid_spawner/singleuser.py b/src/glicid_spawner/singleuser.py
index 8cb7750..35ecad3 100644
--- a/src/glicid_spawner/singleuser.py
+++ b/src/glicid_spawner/singleuser.py
@@ -34,5 +34,5 @@ def main(argv=None):
     run_path(cmd_path, run_name='__main__')
 
 
-if __name__ == '__main__':
+if __name__ == '__main__':  # pragma: no cover
     main()
diff --git a/tests/test_singleuser.py b/tests/test_singleuser.py
new file mode 100644
index 0000000..8220c4e
--- /dev/null
+++ b/tests/test_singleuser.py
@@ -0,0 +1,34 @@
+"""Test singleuser module."""
+import sys
+
+from glicid_spawner import singleuser
+
+
+async def mock_api_request(_, **kwargs):
+    """Mock JupyterHub authentication service."""
+    sys.stdout.write(str(kwargs))
+
+
+def test_singleuser(monkeypatch, capsys):
+    """Test single user main query."""
+    monkeypatch.setattr(
+        singleuser.sys, 'argv', ['/bin/glicid-spawner-singleuser', 'jupyterhub-singleuser']
+    )
+    monkeypatch.setattr(singleuser.HubAuth, 'api_url', 'http://example.org')
+    monkeypatch.setattr(singleuser.HubAuth, '_api_request', mock_api_request)
+    monkeypatch.setattr(singleuser, 'random_port', lambda: 12345)
+    monkeypatch.setattr(singleuser, 'which', lambda cmd: cmd)
+    monkeypatch.setattr(singleuser, 'run_path', lambda cmd, **kwargs: sys.stderr.write(cmd))
+
+    _ = singleuser.main()
+
+    assert sys.argv[-1] == '--port=12345'
+
+    captured = capsys.readouterr()
+
+    assert (
+        captured.out
+        == "{'method': 'POST', 'url': 'http://example.org/batchspawner', 'body': '{\"port\": 12345}'}"
+    )
+
+    assert captured.err == 'jupyterhub-singleuser'