diff --git a/tests/functional/openlp_core/lib/test_exceptions.py b/tests/functional/openlp_core/lib/test_exceptions.py
index 7ffc122c1..c0de323b7 100644
--- a/tests/functional/openlp_core/lib/test_exceptions.py
+++ b/tests/functional/openlp_core/lib/test_exceptions.py
@@ -42,4 +42,4 @@ class TestValidationError(TestCase):
 
         # THEN: Then calling str on the error should return the correct text and it should be an instance of `Exception`
         assert str(error) == 'Test ValidationError'
-        assert isinstance(error, Exception) is True
+        assert isinstance(error, Exception)
diff --git a/tests/functional/openlp_core/lib/test_image_manager.py b/tests/functional/openlp_core/lib/test_image_manager.py
index 0b37b412d..3c47e81a1 100644
--- a/tests/functional/openlp_core/lib/test_image_manager.py
+++ b/tests/functional/openlp_core/lib/test_image_manager.py
@@ -98,7 +98,7 @@ class TestImageManager(TestCase, TestMixin):
         image = self.image_manager.get_image(full_path, 'church.jpg', 80, 80)
 
         # THEN: The return should be of type image
-        assert isinstance(image, QtGui.QImage) is True, 'The returned object should be a QImage'
+        assert isinstance(image, QtGui.QImage), 'The returned object should be a QImage'
 
         # WHEN: adding the same image with different dimensions
         self.image_manager.add_image(full_path, 'church.jpg', None, 100, 100)
diff --git a/tests/functional/openlp_core/lib/test_lib.py b/tests/functional/openlp_core/lib/test_lib.py
index 9230ca5b0..7cc44ec4e 100644
--- a/tests/functional/openlp_core/lib/test_lib.py
+++ b/tests/functional/openlp_core/lib/test_lib.py
@@ -293,7 +293,7 @@ class TestLib(TestCase):
         # THEN: Check if the thumb was created and scaled to the given size.
         self.assertTrue(thumb_path.exists(), 'Test was not ran, because the thumb already exists')
         assert isinstance(icon, QtGui.QIcon), 'The icon should be a QIcon'
-        assert icon.isNull()is False, 'The icon should not be null'
+        assert icon.isNull() is False, 'The icon should not be null'
         assert thumb_size == QtGui.QImageReader(str(thumb_path)).size(), 'The thumb should have the given size'
 
         # Remove the thumb so that the test actually tests if the thumb will be created.
diff --git a/tests/functional/openlp_core/lib/test_serviceitem.py b/tests/functional/openlp_core/lib/test_serviceitem.py
index f07efd2b4..d069f18bf 100644
--- a/tests/functional/openlp_core/lib/test_serviceitem.py
+++ b/tests/functional/openlp_core/lib/test_serviceitem.py
@@ -113,7 +113,7 @@ class TestServiceItem(TestCase, TestMixin):
         service_item.set_from_service(line)
 
         # THEN: We should get back a valid service item
-        assert service_item.is_valid, 'The new service item should be valid'
+        assert service_item.is_valid is True, 'The new service item should be valid'
         assert_length(0, service_item._display_frames, 'The service item should have no display frames')
         assert_length(5, service_item.capabilities, 'There should be 5 default custom item capabilities')
 
@@ -334,7 +334,7 @@ class TestServiceItem(TestCase, TestMixin):
         service_item.set_from_service(line, '/test/')
 
         # THEN: We should get back a valid service item
-        assert service_item.is_valid, 'The new service item should be valid'
+        assert service_item.is_valid is True, 'The new service item should be valid'
         assert 0 == len(service_item._display_frames), 'The service item should have no display frames'
         assert 7 == len(service_item.capabilities), 'There should be 7 default custom item capabilities'