diff --git a/bumblebee_status/modules/core/load.py b/bumblebee_status/modules/core/load.py
index 7800c88..ca7d26a 100644
--- a/bumblebee_status/modules/core/load.py
+++ b/bumblebee_status/modules/core/load.py
@@ -27,6 +27,7 @@ class Module(core.module.Module):
             self._cpus = multiprocessing.cpu_count()
         except NotImplementedError as e:
             self._cpus = 1
+
         core.input.register(
             self, button=core.input.LEFT_MOUSE, cmd="gnome-system-monitor"
         )
diff --git a/tests/modules/core/test_load.py b/tests/modules/core/test_load.py
index 2210f9e..a80e6f6 100644
--- a/tests/modules/core/test_load.py
+++ b/tests/modules/core/test_load.py
@@ -1,7 +1,131 @@
 import pytest
+from unittest import TestCase, mock
 
+import core.config
+import core.widget
+import modules.core.load
+
+pytest.importorskip("os")
 pytest.importorskip("multiprocessing")
 
-def test_load_module():
-    __import__("modules.core.load")
+def build_module():
+    config = core.config.Config([])
+    return modules.core.load.Module(config=config, theme=None)
+
+def widget(module):
+    return module.widgets()[0]
+
+class TestLoad(TestCase):
+    def test_load_module(self):
+        __import__("modules.core.load")
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_initial_values(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 1
+        load_avg_mock.return_value = (0.10, 0.20, 0.30)
+
+        module = build_module()
+
+        assert widget(module).full_text() == '0.00/0.00/0.00'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_update_values(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 1
+        load_avg_mock.return_value = (0.85, 0.95, 0.25)
+
+        module = build_module()
+        module.update()
+
+        assert widget(module).full_text() == '0.85/0.95/0.25'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_cpu_count_exception(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.side_effect = NotImplementedError
+        load_avg_mock.return_value = (0.1, 0.2, 0.3)
+
+        module = build_module()
+        module.update()
+
+        assert widget(module).full_text() == '0.10/0.20/0.30'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_healthy_state(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 1
+        load_avg_mock.return_value = (0.55, 0.95, 0.25)
+
+        module = build_module()
+        module.update()
+
+        assert module.state(widget(module)) == None
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_warning_state(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 1
+        load_avg_mock.return_value = (0.8, 0.85, 0.9)
+
+        module = build_module()
+        module.update()
+
+        assert module.state(widget(module)) == 'warning'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_critical_state(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 1
+        load_avg_mock.return_value = (0.95, 0.85, 0.9)
+
+        module = build_module()
+        module.update()
+
+        assert module.state(widget(module)) == 'critical'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_healthy_state_with_8_cpus(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 8
+        load_avg_mock.return_value = (4.42, 0.85, 0.9)
+
+        module = build_module()
+        module.update()
+
+        assert module.state(widget(module)) == None
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_warning_state_with_8_cpus(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 8
+        load_avg_mock.return_value = (5.65, 0.85, 0.9)
+
+        module = build_module()
+        module.update()
+
+        assert module.state(widget(module)) == 'warning'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    def test_critical_state_with_8_cpus(self, load_avg_mock, cpu_count_mock):
+        cpu_count_mock.return_value = 8
+        load_avg_mock.return_value = (6.45, 0.85, 0.9)
+
+        module = build_module()
+        module.update()
+
+        assert module.state(widget(module)) == 'critical'
+
+    @mock.patch('multiprocessing.cpu_count')
+    @mock.patch('os.getloadavg')
+    @mock.patch('core.input.register')
+    def test_register_left_mouse_action(self, input_register_mock, load_avg_mock, cpu_count_mock):
+        module = build_module()
+
+        input_register_mock.assert_called_with(
+            module,
+            button=core.input.LEFT_MOUSE,
+            cmd='gnome-system-monitor'
+        )