diff --git a/tests/modules/test_cpu.py b/tests/modules/test_cpu.py
new file mode 100644
index 0000000..b53d2ad
--- /dev/null
+++ b/tests/modules/test_cpu.py
@@ -0,0 +1,61 @@
+# pylint: disable=C0103,C0111
+
+import json
+import unittest
+import mock
+
+import tests.mocks as mocks
+
+from bumblebee.config import Config
+from bumblebee.input import I3BarInput, LEFT_MOUSE
+from bumblebee.modules.cpu import Module
+
+class TestCPUModule(unittest.TestCase):
+    def setUp(self):
+        self._stdin, self._select, self.stdin, self.select = mocks.epoll_mock("bumblebee.input")
+
+        self.popen = mocks.MockPopen()
+        self._psutil = mock.patch("bumblebee.modules.cpu.psutil")
+        self.psutil = self._psutil.start()
+
+        self.config = Config()
+        self.input = I3BarInput()
+        self.engine = mock.Mock()
+        self.engine.input = self.input
+        self.input.need_event = True
+        self.module = Module(engine=self.engine, config={ "config": self.config })
+        for widget in self.module.widgets():
+            widget.link_module(self.module)
+            self.anyWidget = widget
+
+    def tearDown(self):
+        self._stdin.stop()
+        self._select.stop()
+        self._psutil.stop()
+        self.popen.cleanup()
+
+    def test_format(self):
+        self.psutil.cpu_percent.return_value = 21.0
+        self.module.update_all()
+        for widget in self.module.widgets():
+            self.assertEquals(len(widget.full_text()), len("100.00%"))
+
+    def test_leftclick(self):
+        mocks.mouseEvent(stdin=self.stdin, button=LEFT_MOUSE, inp=self.input, module=self.module)
+        self.popen.assert_call("gnome-system-monitor")
+
+    def test_warning(self):
+        self.config.set("cpu.critical", "20")
+        self.config.set("cpu.warning", "18")
+        self.psutil.cpu_percent.return_value = 19.0
+        self.module.update_all()
+        self.assertTrue("warning" in self.module.state(self.anyWidget))
+
+    def test_critical(self):
+        self.config.set("cpu.critical", "20")
+        self.config.set("cpu.warning", "19")
+        self.psutil.cpu_percent.return_value = 21.0
+        self.module.update_all()
+        self.assertTrue("critical" in self.module.state(self.anyWidget))
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4