diff --git a/test/formats/common.py b/test/formats/common.py
index be41c6745..7a2a4d90f 100644
--- a/test/formats/common.py
+++ b/test/formats/common.py
@@ -227,7 +227,7 @@ class CommonTests:
             loaded_metadata = save_and_load_metadata(self.filename, metadata)
             for tag in tags:
                 self.assertFalse(self.format.supports_tag(tag))
-                self.assertTrue(tag not in loaded_metadata, '%s: %r != None' % (tag, loaded_metadata[tag]))
+                self.assertNotIn(tag, loaded_metadata, '%s: %r != None' % (tag, loaded_metadata[tag]))
 
     class TagFormatsTestCase(SimpleFormatsTestCase):
 
diff --git a/test/formats/test_id3.py b/test/formats/test_id3.py
index 323f0ebe7..7c1fd070f 100644
--- a/test/formats/test_id3.py
+++ b/test/formats/test_id3.py
@@ -176,21 +176,21 @@ class CommonId3Tests:
             file_path = os.path.join('test', 'data', 'test-id3-rename-tags.mp3')
             filename = self.copy_file_tmp(file_path, 'mp3')
             raw_metadata = load_raw(filename)
-            self.assertTrue('TXXX:Artists' in raw_metadata)
-            self.assertFalse('TXXX:ARTISTS' in raw_metadata)
-            self.assertTrue('TXXX:Work' in raw_metadata)
-            self.assertFalse('TXXX:WORK' in raw_metadata)
+            self.assertIn('TXXX:Artists', raw_metadata)
+            self.assertNotIn('TXXX:ARTISTS', raw_metadata)
+            self.assertIn('TXXX:Work', raw_metadata)
+            self.assertNotIn('TXXX:WORK', raw_metadata)
             metadata = load_metadata(filename)
             self.assertEqual(metadata['artists'], 'Artist1; Artist2')
-            self.assertFalse('Artists' in metadata)
+            self.assertNotIn('Artists', metadata)
             self.assertEqual(metadata['work'], 'The Work')
-            self.assertFalse('Work' in metadata)
+            self.assertNotIn('Work', metadata)
             save_metadata(filename, metadata)
             raw_metadata = load_raw(filename)
-            self.assertFalse('TXXX:Artists' in raw_metadata)
-            self.assertTrue('TXXX:ARTISTS' in raw_metadata)
-            self.assertFalse('TXXX:Work' in raw_metadata)
-            self.assertTrue('TXXX:WORK' in raw_metadata)
+            self.assertNotIn('TXXX:Artists', raw_metadata)
+            self.assertIn('TXXX:ARTISTS', raw_metadata)
+            self.assertNotIn('TXXX:Work', raw_metadata)
+            self.assertIn('TXXX:WORK', raw_metadata)
 
         def test_preserve_unchanged_tags_v23(self):
             config.setting['write_id3v23'] = True
diff --git a/test/test_imagelist.py b/test/test_imagelist.py
index effd28b42..151960796 100644
--- a/test/test_imagelist.py
+++ b/test/test_imagelist.py
@@ -262,8 +262,8 @@ class ImageListTest(PicardTestCase):
         list3.append(self.images['a'])
         list3.append(self.images['c'])
 
-        self.assertTrue(list1 == list2)
-        self.assertFalse(list1 == list3)
+        self.assertEqual(list1, list2)
+        self.assertNotEqual(list1, list3)
 
     def test_get_front_image(self):
         self.imagelist.append(self.images['a'])
diff --git a/test/test_mbjson.py b/test/test_mbjson.py
index bdcfb9b6c..3ecedeed3 100644
--- a/test/test_mbjson.py
+++ b/test/test_mbjson.py
@@ -157,7 +157,7 @@ class RecordingCreditsTest(MBJSONTest):
         t = Track("1")
         recording_to_metadata(self.json_doc, m, t)
         config.setting["standardize_artists"] = False
-        self.assertTrue('performer:solo' not in m)
+        self.assertNotIn('performer:solo', m)
         self.assertEqual(m['performer:solo vocals'], 'Frida')
 
     def test_recording_standardize_artist_credits(self):
@@ -165,7 +165,7 @@ class RecordingCreditsTest(MBJSONTest):
         t = Track("1")
         config.setting["standardize_artists"] = True
         recording_to_metadata(self.json_doc, m, t)
-        self.assertTrue('performer:solo' not in m)
+        self.assertNotIn('performer:solo', m)
         self.assertEqual(m['performer:solo vocals'], 'Anni-Frid Lyngstad')
 
 
diff --git a/test/test_metadata.py b/test/test_metadata.py
index bb8f8f7ad..315d2485f 100644
--- a/test/test_metadata.py
+++ b/test/test_metadata.py
@@ -237,7 +237,7 @@ class MetadataTest(PicardTestCase):
         d = {'a': 'b', 'c': 2, 'd': ['x', 'y'], 'x': '', 'z': {'u', 'w'}}
         deleted_tags = set('c')
         m = Metadata(d, deleted_tags=deleted_tags, length=1234)
-        self.assertTrue('a' in m)
+        self.assertIn('a', m)
         self.assertEqual(m.getraw('a'), ['b'])
         self.assertEqual(m['d'], MULTI_VALUED_JOINER.join(d['d']))
         self.assertNotIn('c', m)