diff --git a/tests/test_imagebuildphase.py b/tests/test_imagebuildphase.py
index c0f5ac7d..6eb58133 100644
--- a/tests/test_imagebuildphase.py
+++ b/tests/test_imagebuildphase.py
@@ -45,7 +45,7 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         client_args = {
             "original_image_conf": original_image_conf,
             "image_conf": {
@@ -137,7 +137,7 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         server_args = {
             "original_image_conf": original_image_conf,
             "image_conf": {
@@ -196,7 +196,7 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         server_args = {
             "original_image_conf": original_image_conf,
             "image_conf": {
@@ -261,8 +261,8 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertFalse(phase.pool.add.called)
-        self.assertFalse(phase.pool.queue_put.called)
+        phase.pool.add.assert_not_called()
+        phase.pool.queue_put.assert_not_called()
 
     @mock.patch("pungi.phases.image_build.ThreadPool")
     def test_image_build_set_install_tree(self, ThreadPool):
@@ -297,9 +297,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertEqual(args[0][0], compose)
         self.assertDictEqual(
@@ -364,9 +364,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertEqual(args[0][0], compose)
         self.assertDictEqual(
@@ -430,9 +430,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertEqual(args[0][0], compose)
         self.assertDictEqual(
@@ -501,9 +501,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertEqual(args[0][0], compose)
         self.assertDictEqual(
@@ -569,9 +569,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertEqual(
             args[0][1].get("image_conf", {}).get("image-build", {}).get("release"),
@@ -612,9 +612,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertEqual(
             args[0][1].get("image_conf", {}).get("image-build", {}).get("release"),
@@ -655,9 +655,9 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
-        self.assertTrue(phase.pool.queue_put.called_once)
+        phase.pool.queue_put.assert_called_once()
         args, kwargs = phase.pool.queue_put.call_args
         self.assertTrue(args[0][1].get("scratch"))
 
@@ -692,7 +692,7 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         server_args = {
             "original_image_conf": original_image_conf,
             "image_conf": {
@@ -755,7 +755,7 @@ class TestImageBuildPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         server_args = {
             "original_image_conf": original_image_conf,
             "image_conf": {
diff --git a/tests/test_liveimagesphase.py b/tests/test_liveimagesphase.py
index d459c9b9..acade8e6 100644
--- a/tests/test_liveimagesphase.py
+++ b/tests/test_liveimagesphase.py
@@ -43,7 +43,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -124,7 +124,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -192,7 +192,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -265,7 +265,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -363,7 +363,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -433,7 +433,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -503,7 +503,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
@@ -571,7 +571,7 @@ class TestLiveImagesPhase(PungiTestCase):
         phase.run()
 
         # assert at least one thread was started
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.maxDiff = None
         six.assertCountEqual(
             self,
diff --git a/tests/test_livemediaphase.py b/tests/test_livemediaphase.py
index 7a406716..9eea3374 100644
--- a/tests/test_livemediaphase.py
+++ b/tests/test_livemediaphase.py
@@ -36,7 +36,7 @@ class TestLiveMediaPhase(PungiTestCase):
         phase = LiveMediaPhase(compose)
 
         phase.run()
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.assertEqual(
             phase.pool.queue_put.call_args_list,
             [
@@ -93,7 +93,7 @@ class TestLiveMediaPhase(PungiTestCase):
         phase = LiveMediaPhase(compose)
 
         phase.run()
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.assertEqual(
             phase.pool.queue_put.call_args_list,
             [
@@ -156,7 +156,7 @@ class TestLiveMediaPhase(PungiTestCase):
         phase = LiveMediaPhase(compose)
 
         phase.run()
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.assertEqual(
             phase.pool.queue_put.call_args_list,
             [
@@ -267,7 +267,7 @@ class TestLiveMediaPhase(PungiTestCase):
         phase = LiveMediaPhase(compose)
 
         phase.run()
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
         self.assertEqual(
             phase.pool.queue_put.call_args_list,
             [
@@ -444,7 +444,7 @@ class TestLiveMediaPhase(PungiTestCase):
         phase = LiveMediaPhase(compose)
 
         phase.run()
-        self.assertTrue(phase.pool.add.called)
+        phase.pool.add.assert_called()
 
         self.assertEqual(
             phase.pool.queue_put.call_args_list,
diff --git a/tests/test_notifier.py b/tests/test_notifier.py
index 914d6314..2273add2 100644
--- a/tests/test_notifier.py
+++ b/tests/test_notifier.py
@@ -133,7 +133,7 @@ class TestNotifier(unittest.TestCase):
     def test_does_not_run_without_config(self, run, makedirs):
         n = PungiNotifier(None)
         n.send("cmd", foo="bar", baz="quux")
-        self.assertFalse(run.called)
+        run.assert_not_called()
 
     @mock.patch("pungi.util.translate_path")
     @mock.patch("kobo.shortcuts.run")
@@ -146,4 +146,4 @@ class TestNotifier(unittest.TestCase):
         n.send("cmd", **self.data)
 
         self.assertEqual(run.call_args_list, [self._call("run-notify", "cmd")])
-        self.assertTrue(self.compose.log_warning.called)
+        self.compose.log_warning.assert_called()