diff --git a/lib/ctt/test/__init__.py b/lib/ctt/test/__init__.py
new file mode 100644
index 0000000..71ea5a3
--- /dev/null
+++ b/lib/ctt/test/__init__.py
@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+#
+# 2016 Darko Poljak (darko.poljak at gmail.com))
+#
+# This file is part of ctt.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import os
+import unittest
+
+fixtures_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), "fixtures"))
+
+class CttTestCase(unittest.TestCase):
+    def setUp(self):
+        os.environ['HOME'] = fixtures_dir
diff --git a/lib/ctt/test/__main__.py b/lib/ctt/test/__main__.py
new file mode 100644
index 0000000..418ca27
--- /dev/null
+++ b/lib/ctt/test/__main__.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# 2011 Nico Schottelius (nico-cdist at schottelius.org)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import imp
+import os
+import os.path
+import sys
+import unittest
+
+base_dir = os.path.dirname(os.path.realpath(__file__))
+
+test_modules = []
+for possible_test in os.listdir(base_dir):
+    if possible_test.startswith('test_'):
+        mod_path = os.path.join(base_dir, possible_test)
+        if os.path.isfile(mod_path):
+            module = os.path.splitext(os.path.basename(possible_test))[0]
+            test_modules.append(module)
+
+suites = []
+for test_module in test_modules:
+    module_parameters = imp.find_module(test_module, [base_dir])
+    module = imp.load_module("ctt.test." + test_module, *module_parameters)
+
+    suite = unittest.defaultTestLoader.loadTestsFromModule(module)
+    suites.append(suite)
+
+all_suites = unittest.TestSuite(suites)
+unittest.TextTestRunner(verbosity=2).run(all_suites)
diff --git a/lib/ctt/test/fixtures/.ctt/foo1/2016-04-07-0826/comment b/lib/ctt/test/fixtures/.ctt/foo1/2016-04-07-0826/comment
new file mode 100644
index 0000000..1715acd
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/foo1/2016-04-07-0826/comment
@@ -0,0 +1 @@
+foo1
diff --git a/lib/ctt/test/fixtures/.ctt/foo1/2016-04-07-0826/delta b/lib/ctt/test/fixtures/.ctt/foo1/2016-04-07-0826/delta
new file mode 100644
index 0000000..ee0c264
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/foo1/2016-04-07-0826/delta
@@ -0,0 +1 @@
+6.248274
diff --git a/lib/ctt/test/fixtures/.ctt/foo2/2016-04-07-0810/comment b/lib/ctt/test/fixtures/.ctt/foo2/2016-04-07-0810/comment
new file mode 100644
index 0000000..54b060e
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/foo2/2016-04-07-0810/comment
@@ -0,0 +1 @@
+foo2
diff --git a/lib/ctt/test/fixtures/.ctt/foo2/2016-04-07-0810/delta b/lib/ctt/test/fixtures/.ctt/foo2/2016-04-07-0810/delta
new file mode 100644
index 0000000..45cbdd1
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/foo2/2016-04-07-0810/delta
@@ -0,0 +1 @@
+10.312733
diff --git a/lib/ctt/test/fixtures/.ctt/foo3/2016-04-02-2110/comment b/lib/ctt/test/fixtures/.ctt/foo3/2016-04-02-2110/comment
new file mode 100644
index 0000000..c1ec6c6
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/foo3/2016-04-02-2110/comment
@@ -0,0 +1 @@
+foo3
diff --git a/lib/ctt/test/fixtures/.ctt/foo3/2016-04-02-2110/delta b/lib/ctt/test/fixtures/.ctt/foo3/2016-04-02-2110/delta
new file mode 100644
index 0000000..98330a4
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/foo3/2016-04-02-2110/delta
@@ -0,0 +1 @@
+4.744116
diff --git a/lib/ctt/test/fixtures/.ctt/spam-eggs/2016-04-07-1229/comment b/lib/ctt/test/fixtures/.ctt/spam-eggs/2016-04-07-1229/comment
new file mode 100644
index 0000000..36c95ea
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/spam-eggs/2016-04-07-1229/comment
@@ -0,0 +1 @@
+spam-eggs
diff --git a/lib/ctt/test/fixtures/.ctt/spam-eggs/2016-04-07-1229/delta b/lib/ctt/test/fixtures/.ctt/spam-eggs/2016-04-07-1229/delta
new file mode 100644
index 0000000..4b20c52
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/spam-eggs/2016-04-07-1229/delta
@@ -0,0 +1 @@
+3.307185
diff --git a/lib/ctt/test/fixtures/.ctt/test-1/2016-04-02-2109/comment b/lib/ctt/test/fixtures/.ctt/test-1/2016-04-02-2109/comment
new file mode 100644
index 0000000..8e2baef
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/test-1/2016-04-02-2109/comment
@@ -0,0 +1 @@
+test-1
diff --git a/lib/ctt/test/fixtures/.ctt/test-1/2016-04-02-2109/delta b/lib/ctt/test/fixtures/.ctt/test-1/2016-04-02-2109/delta
new file mode 100644
index 0000000..bbec04c
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/test-1/2016-04-02-2109/delta
@@ -0,0 +1 @@
+2.972467
diff --git a/lib/ctt/test/fixtures/.ctt/test-2/2016-04-02-2109/comment b/lib/ctt/test/fixtures/.ctt/test-2/2016-04-02-2109/comment
new file mode 100644
index 0000000..38c98d9
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/test-2/2016-04-02-2109/comment
@@ -0,0 +1 @@
+test-2
diff --git a/lib/ctt/test/fixtures/.ctt/test-2/2016-04-02-2109/delta b/lib/ctt/test/fixtures/.ctt/test-2/2016-04-02-2109/delta
new file mode 100644
index 0000000..d1bf127
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/test-2/2016-04-02-2109/delta
@@ -0,0 +1 @@
+2.558247
diff --git a/lib/ctt/test/fixtures/.ctt/test-3/2016-04-02-2109/comment b/lib/ctt/test/fixtures/.ctt/test-3/2016-04-02-2109/comment
new file mode 100644
index 0000000..1be6ab6
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/test-3/2016-04-02-2109/comment
@@ -0,0 +1 @@
+test-3
diff --git a/lib/ctt/test/fixtures/.ctt/test-3/2016-04-02-2109/delta b/lib/ctt/test/fixtures/.ctt/test-3/2016-04-02-2109/delta
new file mode 100644
index 0000000..6a2731f
--- /dev/null
+++ b/lib/ctt/test/fixtures/.ctt/test-3/2016-04-02-2109/delta
@@ -0,0 +1 @@
+1.821598
diff --git a/lib/ctt/test/test_listprojects.py b/lib/ctt/test/test_listprojects.py
new file mode 100755
index 0000000..3946470
--- /dev/null
+++ b/lib/ctt/test/test_listprojects.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# 2012 Nico Schottelius (nico-ctt at schottelius.org)
+#
+# This file is part of ctt.
+#
+# ctt is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# ctt is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ctt. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import unittest
+import ctt
+import ctt.listprojects as cttls
+import ctt.test
+
+class ListProjectsTestCase(ctt.test.CttTestCase):
+
+    def test_list_projects(self):
+        projects = cttls.ListProjects.list_projects()
+        expected_projects = [ 'foo1', 'foo2', 'foo3', 'spam-eggs',
+                'test-1', 'test-2', 'test-3', ]
+        gotten_projects = sorted(projects)
+        self.assertEqual(gotten_projects, expected_projects)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/lib/ctt/test/test_report.py b/lib/ctt/test/test_report.py
new file mode 100755
index 0000000..512e9c0
--- /dev/null
+++ b/lib/ctt/test/test_report.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# 2016 Darko Poljak (darko.poljak at gmail.com)
+#
+# This file is part of ctt.
+#
+# ctt is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# ctt is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ctt. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import unittest
+import ctt
+import ctt.test
+import ctt.tracker as tr
+import os
+import datetime
+import shutil
+
+
+# TODO implement tests
+class ReportTestCase(ctt.test.CttTestCase):
+
+    def test_commandline(self):
+        pass
+
+    def test_print_report_time_entries(self):
+        pass
+
+    def print_reports(self):
+        pass
+
+    def test__init_date(self):
+        pass
+
+    def test__init_report_db(self):
+        pass
+
+    def test_header(self):
+        pass
+
+    def test_summary(self):
+        pass
+
+    def test_total_time(self):
+        pass
+
+    def test__get_report_entry(self):
+        pass
+
+    def test_report(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/lib/ctt/test/test_tracker.py b/lib/ctt/test/test_tracker.py
new file mode 100755
index 0000000..bc96b9b
--- /dev/null
+++ b/lib/ctt/test/test_tracker.py
@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# 2016 Darko Poljak (darko.poljak at gmail.com)
+#
+# This file is part of ctt.
+#
+# ctt is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# ctt is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ctt. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import unittest
+import ctt
+import ctt.test
+import ctt.tracker as tr
+import os
+import datetime
+import shutil
+
+class TrackerTestCase(ctt.test.CttTestCase):
+    def test___init__(self):
+        project = 'foo1'
+        expected_project_dir = os.path.join(ctt.test.fixtures_dir,
+                os.path.join('.ctt', project))
+        tracker = tr.Tracker(project)
+        self.assertEqual(tracker.project, project)
+        self.assertEqual(tracker.project_dir, expected_project_dir)
+        self.assertIsNone(tracker.start_datetime)
+        self.assertIsNone(tracker.end_datetime)
+        self.assertIsNone(tracker.comment)
+        self.assertFalse(tracker._tracked_time)
+
+        tracker = tr.Tracker(project, start_datetime=('2016-04-09-0900',))
+        self.assertEqual(tracker.start_datetime,
+                datetime.datetime(2016, 4, 9, 9, 0))
+        self.assertIsNone(tracker.end_datetime)
+        self.assertFalse(tracker._tracked_time)
+
+        tracker = tr.Tracker(project, start_datetime=('2016-04-04-0900',),
+                end_datetime=('2016-04-09-2000',))
+        self.assertEqual(tracker.start_datetime,
+                datetime.datetime(2016, 4, 4, 9, 0))
+        self.assertEqual(tracker.end_datetime,
+                datetime.datetime(2016, 4, 9, 20, 0))
+        self.assertTrue(tracker._tracked_time)
+
+    @unittest.expectedFailure
+    def test__init__fail(self):
+        project = 'foo1'
+        tracker = tr.Tracker(project, start_datetime=('2016-04-090900',))
+
+    def test_delta(self):
+        project = 'foo1'
+        start_dt = datetime.datetime(2016, 4, 4, 9, 0)
+        end_dt = datetime.datetime(2016, 4, 9, 20, 0)
+        tracker = tr.Tracker(project, start_datetime=('2016-04-04-0900',),
+                end_datetime=('2016-04-09-2000',))
+        expected_delta = end_dt - start_dt
+        tracker._tracked_time = True
+        delta = tracker.delta(True)
+        self.assertEqual(delta, expected_delta.total_seconds())
+        delta = tracker.delta(False)
+        self.assertEqual(delta, expected_delta)
+        tracker._tracked_time = False
+        delta = tracker.delta(True)
+        self.assertEqual(delta, 0)
+        delta = tracker.delta(False)
+        self.assertEqual(delta, datetime.timedelta())
+
+    def test_write_time(self):
+        project = 'foo1'
+        start_dt = '2016-04-09-1730'
+        tracker = tr.Tracker(project, start_datetime=(start_dt,),
+                comment=True)
+        end_dt = datetime.datetime(2016, 4, 9, hour=17, minute=45)
+        expected_delta = str(15 * 60) + '.0\n'  # seconds
+        tracker.end_datetime = end_dt
+        tracker._tracked_time = True
+        expected_comment = "test"
+        tracker.comment = expected_comment
+        expected_comment += "\n"
+        timedir = os.path.join(os.path.join(
+            ctt.test.fixtures_dir, os.path.join('.ctt', project)),
+            '2016-04-09-1730')
+        if os.path.exists(timedir):
+            shutil.rmtree(timedir)
+        tracker.write_time()
+        timefile = os.path.join(timedir, ctt.FILE_DELTA)
+        self.assertTrue(os.path.exists(timefile))
+        with open(timefile, "r") as f:
+            delta = f.read()
+        self.assertEqual(delta, expected_delta)
+        commentfile = os.path.join(timedir, ctt.FILE_COMMENT)
+        self.assertTrue(os.path.exists(commentfile))
+        with open(commentfile, "r") as f:
+            comment = f.read()
+        self.assertEqual(comment, expected_comment)
+
+    @unittest.expectedFailure
+    def test_write_time_fail(self):
+        project = 'foo1'
+        start_dt = '2016-04-09-1730'
+        tracker = tr.Tracker(project, start_datetime=(start_dt,),
+                comment=True)
+        end_dt = datetime.datetime(2016, 4, 9, hour=17, minute=45)
+        expected_delta = 15 * 60  # seconds
+        tracker.end_datetime = end_dt
+        tracker._tracked_time = True
+        expected_comment = "test"
+        tracker.comment = expected_comment
+        timedir = os.path.join(os.path.join(
+            ctt.test.fixtures_dir, os.path.join('.ctt', project)),
+            '2016-04-09-1730')
+        if os.path.exists(timedir):
+            shutil.rmtree(timedir)
+        os.makedirs(timedir, mode=0o700)
+        tracker.write_time()
+
+
+if __name__ == '__main__':
+    unittest.main()