diff --git a/SOURCES/test_centos_cert.py b/SOURCES/test_centos_cert.py
new file mode 100644
index 0000000..d2dfd00
--- /dev/null
+++ b/SOURCES/test_centos_cert.py
@@ -0,0 +1,64 @@
+import imp
+import pytest
+import requests
+
+centos_cert = imp.load_source('centos_cert', 'centos-cert')
+
+
+class MockResponse(object):
+    def raise_for_status(self):
+        pass
+
+    @property
+    def text(self):
+        if self.url == 'https://accounts.centos.org/user/dogencert':
+            return 'DUMMY-USER-CERT'
+        if self.url == 'https://accounts.centos.org/ca/ca-cert.pem':
+            return 'DUMMY-CA-CERT'
+        raise NotImplementedError()
+
+
+class RequestRecorder(object):
+    """ Record args to requests.get() or requests.post() """
+    def __call__(self, url, **kwargs):
+        """ mocking requests.get() or requests.post() """
+        self.response = MockResponse()
+        self.response.url = url
+        self.kwargs = kwargs
+        return self.response
+
+
+@pytest.fixture
+def mock_get():
+    return RequestRecorder()
+
+
+@pytest.fixture
+def mock_post():
+    return RequestRecorder()
+
+
+def test_download(monkeypatch, tmpdir, mock_get, mock_post):
+    monkeypatch.delattr('requests.sessions.Session.request')
+    monkeypatch.setenv('HOME', str(tmpdir))
+    monkeypatch.setattr(requests, 'get', mock_get)
+    monkeypatch.setattr(requests, 'post', mock_post)
+    centos_cert.download_cert('myuser', 'mypass')
+
+    assert mock_get.response.url == \
+        'https://accounts.centos.org/ca/ca-cert.pem'
+    assert mock_post.response.url == \
+        'https://accounts.centos.org/user/dogencert'
+
+    certfile = tmpdir.join('.centos.cert')
+    assert certfile.check(file=1)
+    assert certfile.read() == 'DUMMY-USER-CERT'
+    assert oct(certfile.stat().mode & 0777) == '0600'
+
+    cacertfile = tmpdir.join('.centos-server-ca.cert')
+    assert cacertfile.check(file=1)
+    assert cacertfile.read() == 'DUMMY-CA-CERT'
+
+    uploadcafile = tmpdir.join('.centos-upload-ca.cert')
+    assert uploadcafile.check(file=1)
+    assert uploadcafile.read() == 'DUMMY-CA-CERT'