diff --git a/InvenTree/InvenTree/api_tester.py b/InvenTree/InvenTree/api_tester.py
index 81eebe436a..a65c6ae18b 100644
--- a/InvenTree/InvenTree/api_tester.py
+++ b/InvenTree/InvenTree/api_tester.py
@@ -33,56 +33,69 @@ class UserMixin:
     # Set list of roles automatically associated with the user
     roles = []
 
-    def setUp(self):
-        """Setup for all tests."""
-        super().setUp()
+    @classmethod
+    def setUpTestData(cls):
+        """Run setup for all tests in a given class"""
+        super().setUpTestData()
 
         # Create a user to log in with
-        self.user = get_user_model().objects.create_user(
-            username=self.username,
-            password=self.password,
-            email=self.email
+        cls.user = get_user_model().objects.create_user(
+            username=cls.username,
+            password=cls.password,
+            email=cls.email
         )
 
         # Create a group for the user
-        self.group = Group.objects.create(name='my_test_group')
-        self.user.groups.add(self.group)
+        cls.group = Group.objects.create(name='my_test_group')
+        cls.user.groups.add(cls.group)
 
-        if self.superuser:
-            self.user.is_superuser = True
+        if cls.superuser:
+            cls.user.is_superuser = True
 
-        if self.is_staff:
-            self.user.is_staff = True
+        if cls.is_staff:
+            cls.user.is_staff = True
 
-        self.user.save()
+        cls.user.save()
 
         # Assign all roles if set
-        if self.roles == 'all':
-            self.assignRole(assign_all=True)
+        if cls.roles == 'all':
+            cls.assignRole(group=cls.group, assign_all=True)
+
         # else filter the roles
         else:
-            for role in self.roles:
-                self.assignRole(role)
+            for role in cls.roles:
+                cls.assignRole(role=role, group=cls.group)
+
+    def setUp(self):
+        """Run setup for individual test methods"""
 
         if self.auto_login:
             self.client.login(username=self.username, password=self.password)
 
-    def assignRole(self, role=None, assign_all: bool = False):
+    @classmethod
+    def assignRole(cls, role=None, assign_all: bool = False, group=None):
         """Set the user roles for the registered user.
 
         Arguments:
             role: Role of the format 'rule.permission' e.g. 'part.add'
             assign_all: Set to True to assign *all* roles
+            group: The group to assign roles to (or leave None to use the group assigned to this class)
         """
 
+        if group is None:
+            group = cls.group
+
         if type(assign_all) is not bool:
             # Raise exception if common mistake is made!
-            raise TypeError('assign_all must be a boolean value')
+            raise TypeError('assignRole: assign_all must be a boolean value')
+
+        if not role and not assign_all:
+            raise ValueError('assignRole: either role must be provided, or assign_all must be set')
 
         if not assign_all and role:
             rule, perm = role.split('.')
 
-        for ruleset in self.group.rule_sets.all():
+        for ruleset in group.rule_sets.all():
 
             if assign_all or ruleset.name == rule:
 
diff --git a/InvenTree/InvenTree/test_api.py b/InvenTree/InvenTree/test_api.py
index 0b43f44cd0..e34cd362e9 100644
--- a/InvenTree/InvenTree/test_api.py
+++ b/InvenTree/InvenTree/test_api.py
@@ -8,7 +8,7 @@ from rest_framework import status
 
 from InvenTree.api_tester import InvenTreeAPITestCase
 from InvenTree.helpers import InvenTreeTestCase
-from users.models import RuleSet
+from users.models import RuleSet, update_group_roles
 
 
 class HTMLAPITests(InvenTreeTestCase):
@@ -126,6 +126,10 @@ class APITests(InvenTreeAPITestCase):
         """
         url = reverse('api-user-roles')
 
+        # Delete all rules
+        self.group.rule_sets.all().delete()
+        update_group_roles(self.group)
+
         response = self.client.get(url, format='json')
 
         # Not logged in, so cannot access user role data
diff --git a/InvenTree/InvenTree/tests.py b/InvenTree/InvenTree/tests.py
index 0f5b04f512..bc90bb063d 100644
--- a/InvenTree/InvenTree/tests.py
+++ b/InvenTree/InvenTree/tests.py
@@ -390,10 +390,10 @@ class TestMPTT(TestCase):
         'location',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Setup for all tests."""
-        super().setUp()
-
+        super().setUpTestData()
         StockLocation.objects.rebuild()
 
     def test_self_as_parent(self):
diff --git a/InvenTree/build/test_api.py b/InvenTree/build/test_api.py
index af6d7a0781..bb15aaec8b 100644
--- a/InvenTree/build/test_api.py
+++ b/InvenTree/build/test_api.py
@@ -731,38 +731,42 @@ class BuildOverallocationTest(BuildAPITest):
     Using same Build ID=1 as allocation test above.
     """
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Basic operation as part of test suite setup"""
-        super().setUp()
+        super().setUpTestData()
 
-        self.assignRole('build.add')
-        self.assignRole('build.change')
+        cls.assignRole('build.add')
+        cls.assignRole('build.change')
 
-        self.build = Build.objects.get(pk=1)
-        self.url = reverse('api-build-finish', kwargs={'pk': self.build.pk})
+        cls.build = Build.objects.get(pk=1)
+        cls.url = reverse('api-build-finish', kwargs={'pk': cls.build.pk})
 
         StockItem.objects.create(part=Part.objects.get(pk=50), quantity=30)
 
         # Keep some state for use in later assertions, and then overallocate
-        self.state = {}
-        self.allocation = {}
-        for i, bi in enumerate(self.build.part.bom_items.all()):
-            rq = self.build.required_quantity(bi, None) + i + 1
+        cls.state = {}
+        cls.allocation = {}
+
+        for i, bi in enumerate(cls.build.part.bom_items.all()):
+            rq = cls.build.required_quantity(bi, None) + i + 1
             si = StockItem.objects.filter(part=bi.sub_part, quantity__gte=rq).first()
 
-            self.state[bi.sub_part] = (si, si.quantity, rq)
+            cls.state[bi.sub_part] = (si, si.quantity, rq)
             BuildItem.objects.create(
-                build=self.build,
+                build=cls.build,
                 stock_item=si,
                 quantity=rq,
             )
 
         # create and complete outputs
-        self.build.create_build_output(self.build.quantity)
-        outputs = self.build.build_outputs.all()
-        self.build.complete_build_output(outputs[0], self.user)
+        cls.build.create_build_output(cls.build.quantity)
+        outputs = cls.build.build_outputs.all()
+        cls.build.complete_build_output(outputs[0], cls.user)
+
+    def test_setup(self):
+        """Validate expected state after set-up."""
 
-        # Validate expected state after set-up.
         self.assertEqual(self.build.incomplete_outputs.count(), 0)
         self.assertEqual(self.build.complete_outputs.count(), 1)
         self.assertEqual(self.build.completed, self.build.quantity)
diff --git a/InvenTree/build/test_build.py b/InvenTree/build/test_build.py
index 38c20c331b..8c293bf5d6 100644
--- a/InvenTree/build/test_build.py
+++ b/InvenTree/build/test_build.py
@@ -29,7 +29,8 @@ class BuildTestBase(TestCase):
         'users',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Initialize data to use for these tests.
 
         The base Part 'assembly' has a BOM consisting of three parts:
@@ -45,27 +46,29 @@ class BuildTestBase(TestCase):
 
         """
 
+        super().setUpTestData()
+
         # Create a base "Part"
-        self.assembly = Part.objects.create(
+        cls.assembly = Part.objects.create(
             name="An assembled part",
             description="Why does it matter what my description is?",
             assembly=True,
             trackable=True,
         )
 
-        self.sub_part_1 = Part.objects.create(
+        cls.sub_part_1 = Part.objects.create(
             name="Widget A",
             description="A widget",
             component=True
         )
 
-        self.sub_part_2 = Part.objects.create(
+        cls.sub_part_2 = Part.objects.create(
             name="Widget B",
             description="A widget",
             component=True
         )
 
-        self.sub_part_3 = Part.objects.create(
+        cls.sub_part_3 = Part.objects.create(
             name="Widget C",
             description="A widget",
             component=True,
@@ -73,63 +76,63 @@ class BuildTestBase(TestCase):
         )
 
         # Create BOM item links for the parts
-        self.bom_item_1 = BomItem.objects.create(
-            part=self.assembly,
-            sub_part=self.sub_part_1,
+        cls.bom_item_1 = BomItem.objects.create(
+            part=cls.assembly,
+            sub_part=cls.sub_part_1,
             quantity=5
         )
 
-        self.bom_item_2 = BomItem.objects.create(
-            part=self.assembly,
-            sub_part=self.sub_part_2,
+        cls.bom_item_2 = BomItem.objects.create(
+            part=cls.assembly,
+            sub_part=cls.sub_part_2,
             quantity=3,
             optional=True
         )
 
         # sub_part_3 is trackable!
-        self.bom_item_3 = BomItem.objects.create(
-            part=self.assembly,
-            sub_part=self.sub_part_3,
+        cls.bom_item_3 = BomItem.objects.create(
+            part=cls.assembly,
+            sub_part=cls.sub_part_3,
             quantity=2
         )
 
         ref = generate_next_build_reference()
 
         # Create a "Build" object to make 10x objects
-        self.build = Build.objects.create(
+        cls.build = Build.objects.create(
             reference=ref,
             title="This is a build",
-            part=self.assembly,
+            part=cls.assembly,
             quantity=10,
             issued_by=get_user_model().objects.get(pk=1),
         )
 
         # Create some build output (StockItem) objects
-        self.output_1 = StockItem.objects.create(
-            part=self.assembly,
+        cls.output_1 = StockItem.objects.create(
+            part=cls.assembly,
             quantity=3,
             is_building=True,
-            build=self.build
+            build=cls.build
         )
 
-        self.output_2 = StockItem.objects.create(
-            part=self.assembly,
+        cls.output_2 = StockItem.objects.create(
+            part=cls.assembly,
             quantity=7,
             is_building=True,
-            build=self.build,
+            build=cls.build,
         )
 
         # Create some stock items to assign to the build
-        self.stock_1_1 = StockItem.objects.create(part=self.sub_part_1, quantity=3)
-        self.stock_1_2 = StockItem.objects.create(part=self.sub_part_1, quantity=100)
+        cls.stock_1_1 = StockItem.objects.create(part=cls.sub_part_1, quantity=3)
+        cls.stock_1_2 = StockItem.objects.create(part=cls.sub_part_1, quantity=100)
 
-        self.stock_2_1 = StockItem.objects.create(part=self.sub_part_2, quantity=5)
-        self.stock_2_2 = StockItem.objects.create(part=self.sub_part_2, quantity=5)
-        self.stock_2_3 = StockItem.objects.create(part=self.sub_part_2, quantity=5)
-        self.stock_2_4 = StockItem.objects.create(part=self.sub_part_2, quantity=5)
-        self.stock_2_5 = StockItem.objects.create(part=self.sub_part_2, quantity=5)
+        cls.stock_2_1 = StockItem.objects.create(part=cls.sub_part_2, quantity=5)
+        cls.stock_2_2 = StockItem.objects.create(part=cls.sub_part_2, quantity=5)
+        cls.stock_2_3 = StockItem.objects.create(part=cls.sub_part_2, quantity=5)
+        cls.stock_2_4 = StockItem.objects.create(part=cls.sub_part_2, quantity=5)
+        cls.stock_2_5 = StockItem.objects.create(part=cls.sub_part_2, quantity=5)
 
-        self.stock_3_1 = StockItem.objects.create(part=self.sub_part_3, quantity=1000)
+        cls.stock_3_1 = StockItem.objects.create(part=cls.sub_part_3, quantity=1000)
 
 
 class BuildTest(BuildTestBase):
diff --git a/InvenTree/common/tests.py b/InvenTree/common/tests.py
index f77b32ca0e..ce6f1bf283 100644
--- a/InvenTree/common/tests.py
+++ b/InvenTree/common/tests.py
@@ -1,6 +1,7 @@
 """Tests for mechanisms in common."""
 
 import json
+import time
 from datetime import timedelta
 from http import HTTPStatus
 
@@ -921,7 +922,16 @@ class CurrencyAPITests(InvenTreeAPITestCase):
         # Delete any existing exchange rate data
         Rate.objects.all().delete()
 
-        self.post(reverse('api-currency-refresh'))
+        # Updating via the external exchange may not work every time
+        for _idx in range(5):
+            self.post(reverse('api-currency-refresh'))
 
-        # There should be some new exchange rate objects now
-        self.assertTrue(Rate.objects.all().exists())
+            # There should be some new exchange rate objects now
+            if Rate.objects.all().exists():
+                # Exit early
+                return
+
+            # Delay and try again
+            time.sleep(10)
+
+        raise TimeoutError("Could not refresh currency exchange data after 5 attempts")
diff --git a/InvenTree/company/test_api.py b/InvenTree/company/test_api.py
index 6f3e9e5bf2..aa33385d2c 100644
--- a/InvenTree/company/test_api.py
+++ b/InvenTree/company/test_api.py
@@ -17,11 +17,14 @@ class CompanyTest(InvenTreeAPITestCase):
         'purchase_order.change',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Perform initialization for the unit test class"""
-        super().setUp()
 
-        self.acme = Company.objects.create(name='ACME', description='Supplier', is_customer=False, is_supplier=True)
+        super().setUpTestData()
+
+        # Create some company objects to work with
+        cls.acme = Company.objects.create(name='ACME', description='Supplier', is_customer=False, is_supplier=True)
         Company.objects.create(name='Drippy Cup Co.', description='Customer', is_customer=True, is_supplier=False)
         Company.objects.create(name='Sippy Cup Emporium', description='Another supplier')
 
diff --git a/InvenTree/company/tests.py b/InvenTree/company/tests.py
index cb42653afc..ae0ab87e5d 100644
--- a/InvenTree/company/tests.py
+++ b/InvenTree/company/tests.py
@@ -26,8 +26,12 @@ class CompanySimpleTest(TestCase):
         'price_breaks',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Perform initialization for the tests in this class"""
+
+        super().setUpTestData()
+
         Company.objects.create(name='ABC Co.',
                                description='Seller of ABC products',
                                website='www.abc-sales.com',
@@ -35,10 +39,10 @@ class CompanySimpleTest(TestCase):
                                is_customer=False,
                                is_supplier=True)
 
-        self.acme0001 = SupplierPart.objects.get(SKU='ACME0001')
-        self.acme0002 = SupplierPart.objects.get(SKU='ACME0002')
-        self.zerglphs = SupplierPart.objects.get(SKU='ZERGLPHS')
-        self.zergm312 = SupplierPart.objects.get(SKU='ZERGM312')
+        cls.acme0001 = SupplierPart.objects.get(SKU='ACME0001')
+        cls.acme0002 = SupplierPart.objects.get(SKU='ACME0002')
+        cls.zerglphs = SupplierPart.objects.get(SKU='ZERGLPHS')
+        cls.zergm312 = SupplierPart.objects.get(SKU='ZERGM312')
 
     def test_company_model(self):
         """Tests for the company model data"""
diff --git a/InvenTree/label/tests.py b/InvenTree/label/tests.py
index 605d706181..88e4fad4f0 100644
--- a/InvenTree/label/tests.py
+++ b/InvenTree/label/tests.py
@@ -27,9 +27,10 @@ class LabelTest(InvenTreeAPITestCase):
         'stock'
     ]
 
-    def setUp(self) -> None:
+    @classmethod
+    def setUpTestData(cls):
         """Ensure that some label instances exist as part of init routine"""
-        super().setUp()
+        super().setUpTestData()
         apps.get_app_config('label').create_labels()
 
     def test_default_labels(self):
diff --git a/InvenTree/order/test_api.py b/InvenTree/order/test_api.py
index 976f198cad..631b54caaf 100644
--- a/InvenTree/order/test_api.py
+++ b/InvenTree/order/test_api.py
@@ -1408,25 +1408,33 @@ class SalesOrderLineItemTest(OrderTest):
 
     LIST_URL = reverse('api-so-line-list')
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Init routine for this unit test class"""
-        super().setUp()
+        super().setUpTestData()
 
         # List of salable parts
         parts = Part.objects.filter(salable=True)
 
+        lines = []
+
         # Create a bunch of SalesOrderLineItems for each order
         for idx, so in enumerate(models.SalesOrder.objects.all()):
 
             for part in parts:
-                models.SalesOrderLineItem.objects.create(
-                    order=so,
-                    part=part,
-                    quantity=(idx + 1) * 5,
-                    reference=f"Order {so.reference} - line {idx}",
+                lines.append(
+                    models.SalesOrderLineItem(
+                        order=so,
+                        part=part,
+                        quantity=(idx + 1) * 5,
+                        reference=f"Order {so.reference} - line {idx}",
+                    )
                 )
 
-        self.url = reverse('api-so-line-list')
+        # Bulk create
+        models.SalesOrderLineItem.objects.bulk_create(lines)
+
+        cls.url = reverse('api-so-line-list')
 
     def test_so_line_list(self):
         """Test list endpoint"""
diff --git a/InvenTree/order/test_sales_order.py b/InvenTree/order/test_sales_order.py
index 98db41ff42..9050ad8704 100644
--- a/InvenTree/order/test_sales_order.py
+++ b/InvenTree/order/test_sales_order.py
@@ -25,33 +25,34 @@ class SalesOrderTest(TestCase):
         'users',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Initial setup for this set of unit tests"""
         # Create a Company to ship the goods to
-        self.customer = Company.objects.create(name="ABC Co", description="My customer", is_customer=True)
+        cls.customer = Company.objects.create(name="ABC Co", description="My customer", is_customer=True)
 
         # Create a Part to ship
-        self.part = Part.objects.create(name='Spanner', salable=True, description='A spanner that I sell')
+        cls.part = Part.objects.create(name='Spanner', salable=True, description='A spanner that I sell')
 
         # Create some stock!
-        self.Sa = StockItem.objects.create(part=self.part, quantity=100)
-        self.Sb = StockItem.objects.create(part=self.part, quantity=200)
+        cls.Sa = StockItem.objects.create(part=cls.part, quantity=100)
+        cls.Sb = StockItem.objects.create(part=cls.part, quantity=200)
 
         # Create a SalesOrder to ship against
-        self.order = SalesOrder.objects.create(
-            customer=self.customer,
+        cls.order = SalesOrder.objects.create(
+            customer=cls.customer,
             reference='SO-1234',
             customer_reference='ABC 55555'
         )
 
         # Create a Shipment against this SalesOrder
-        self.shipment = SalesOrderShipment.objects.create(
-            order=self.order,
+        cls.shipment = SalesOrderShipment.objects.create(
+            order=cls.order,
             reference='SO-001',
         )
 
         # Create a line item
-        self.line = SalesOrderLineItem.objects.create(quantity=50, order=self.order, part=self.part)
+        cls.line = SalesOrderLineItem.objects.create(quantity=50, order=cls.order, part=cls.part)
 
     def test_so_reference(self):
         """Unit tests for sales order generation"""
diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index 1aabf5ffb8..d3b0408eaf 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -2357,12 +2357,12 @@ class PartPricing(common.models.MetaMixin):
 
         if self.scheduled_for_update:
             # Ignore if the pricing is already scheduled to be updated
-            logger.info(f"Pricing for {p} already scheduled for update - skipping")
+            logger.debug(f"Pricing for {p} already scheduled for update - skipping")
             return
 
         if counter > 25:
             # Prevent infinite recursion / stack depth issues
-            logger.info(counter, f"Skipping pricing update for {p} - maximum depth exceeded")
+            logger.debug(counter, f"Skipping pricing update for {p} - maximum depth exceeded")
             return
 
         try:
diff --git a/InvenTree/part/test_api.py b/InvenTree/part/test_api.py
index fedbc55b84..1c83be1a4a 100644
--- a/InvenTree/part/test_api.py
+++ b/InvenTree/part/test_api.py
@@ -1893,15 +1893,16 @@ class PartAPIAggregationTest(InvenTreeAPITestCase):
         'part.change',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Create test data as part of setup routine"""
-        super().setUp()
+        super().setUpTestData()
 
         # Ensure the part "variant" tree is correctly structured
         Part.objects.rebuild()
 
         # Add a new part
-        self.part = Part.objects.create(
+        cls.part = Part.objects.create(
             name='Banana',
             description='This is a banana',
             category=PartCategory.objects.get(pk=1),
@@ -1910,12 +1911,12 @@ class PartAPIAggregationTest(InvenTreeAPITestCase):
         # Create some stock items associated with the part
 
         # First create 600 units which are OK
-        StockItem.objects.create(part=self.part, quantity=100)
-        StockItem.objects.create(part=self.part, quantity=200)
-        StockItem.objects.create(part=self.part, quantity=300)
+        StockItem.objects.create(part=cls.part, quantity=100)
+        StockItem.objects.create(part=cls.part, quantity=200)
+        StockItem.objects.create(part=cls.part, quantity=300)
 
         # Now create another 400 units which are LOST
-        StockItem.objects.create(part=self.part, quantity=400, status=StockStatus.LOST)
+        StockItem.objects.create(part=cls.part, quantity=400, status=StockStatus.LOST)
 
     def get_part_data(self):
         """Helper function for retrieving part data"""
diff --git a/InvenTree/part/test_bom_import.py b/InvenTree/part/test_bom_import.py
index 73410ea350..d7d3367bb8 100644
--- a/InvenTree/part/test_bom_import.py
+++ b/InvenTree/part/test_bom_import.py
@@ -17,26 +17,35 @@ class BomUploadTest(InvenTreeAPITestCase):
         'part.change',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Create BOM data as part of setup routine"""
-        super().setUp()
+        super().setUpTestData()
 
-        self.part = Part.objects.create(
+        cls.part = Part.objects.create(
             name='Assembly',
             description='An assembled part',
             assembly=True,
             component=False,
         )
 
+        parts = []
+
         for i in range(10):
-            Part.objects.create(
-                name=f"Component {i}",
-                IPN=f"CMP_{i}",
-                description="A subcomponent that can be used in a BOM",
-                component=True,
-                assembly=False,
+            parts.append(
+                Part(
+                    name=f"Component {i}",
+                    IPN=f"CMP_{i}",
+                    description="A subcomponent that can be used in a BOM",
+                    component=True,
+                    assembly=False,
+                    lft=0, rght=0,
+                    level=0, tree_id=0,
+                )
             )
 
+        Part.objects.bulk_create(parts)
+
     def post_bom(self, filename, file_data, clear_existing=None, expected_code=None, content_type='text/plain'):
         """Helper function for submitting a BOM file"""
         bom_file = SimpleUploadedFile(
diff --git a/InvenTree/part/test_category.py b/InvenTree/part/test_category.py
index 8044dddf7e..f484314415 100644
--- a/InvenTree/part/test_category.py
+++ b/InvenTree/part/test_category.py
@@ -19,15 +19,19 @@ class CategoryTest(TestCase):
         'params',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Extract some interesting categories for time-saving"""
-        self.electronics = PartCategory.objects.get(name='Electronics')
-        self.mechanical = PartCategory.objects.get(name='Mechanical')
-        self.resistors = PartCategory.objects.get(name='Resistors')
-        self.capacitors = PartCategory.objects.get(name='Capacitors')
-        self.fasteners = PartCategory.objects.get(name='Fasteners')
-        self.ic = PartCategory.objects.get(name='IC')
-        self.transceivers = PartCategory.objects.get(name='Transceivers')
+
+        super().setUpTestData()
+
+        cls.electronics = PartCategory.objects.get(name='Electronics')
+        cls.mechanical = PartCategory.objects.get(name='Mechanical')
+        cls.resistors = PartCategory.objects.get(name='Resistors')
+        cls.capacitors = PartCategory.objects.get(name='Capacitors')
+        cls.fasteners = PartCategory.objects.get(name='Fasteners')
+        cls.ic = PartCategory.objects.get(name='IC')
+        cls.transceivers = PartCategory.objects.get(name='Transceivers')
 
     def test_parents(self):
         """Test that the parent fields are properly set, based on the test fixtures."""
diff --git a/InvenTree/part/test_part.py b/InvenTree/part/test_part.py
index d6b191be13..aaeb4d9085 100644
--- a/InvenTree/part/test_part.py
+++ b/InvenTree/part/test_part.py
@@ -134,14 +134,16 @@ class PartTest(TestCase):
         'part_pricebreaks'
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Create some Part instances as part of init routine"""
-        super().setUp()
 
-        self.r1 = Part.objects.get(name='R_2K2_0805')
-        self.r2 = Part.objects.get(name='R_4K7_0603')
+        super().setUpTestData()
 
-        self.c1 = Part.objects.get(name='C_22N_0805')
+        cls.r1 = Part.objects.get(name='R_2K2_0805')
+        cls.r2 = Part.objects.get(name='R_4K7_0603')
+
+        cls.c1 = Part.objects.get(name='C_22N_0805')
 
         Part.objects.rebuild()
 
@@ -529,15 +531,16 @@ class PartSubscriptionTests(InvenTreeTestCase):
         'part',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Create category and part data as part of setup routine"""
-        super().setUp()
+        super().setUpTestData()
 
-        # electronics / IC / MCU
-        self.category = PartCategory.objects.get(pk=4)
+        # Electronics / IC / MCU
+        cls.category = PartCategory.objects.get(pk=4)
 
-        self.part = Part.objects.create(
-            category=self.category,
+        cls.part = Part.objects.create(
+            category=cls.category,
             name='STM32F103',
             description='Currently worth a lot of money',
             is_template=True,
@@ -629,14 +632,16 @@ class BaseNotificationIntegrationTest(InvenTreeTestCase):
         'stock'
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Add an email address as part of initialization"""
-        super().setUp()
-        # Add Mailadress
-        EmailAddress.objects.create(user=self.user, email='test@testing.com')
+        super().setUpTestData()
+
+        # Add email address
+        EmailAddress.objects.create(user=cls.user, email='test@testing.com')
 
         # Define part that will be tested
-        self.part = Part.objects.get(name='R_2K2_0805')
+        cls.part = Part.objects.get(name='R_2K2_0805')
 
     def _notification_run(self, run_class=None):
         """Run a notification test suit through.
diff --git a/InvenTree/part/test_pricing.py b/InvenTree/part/test_pricing.py
index dcd2fdc4aa..e470b2389d 100644
--- a/InvenTree/part/test_pricing.py
+++ b/InvenTree/part/test_pricing.py
@@ -20,6 +20,8 @@ class PartPricingTests(InvenTreeTestCase):
     def setUp(self):
         """Setup routines"""
 
+        super().setUp()
+
         self.generate_exchange_rates()
 
         # Create a new part for performing pricing calculations
@@ -29,8 +31,6 @@ class PartPricingTests(InvenTreeTestCase):
             assembly=True
         )
 
-        return super().setUp()
-
     def create_price_breaks(self):
         """Create some price breaks for the part, in various currencies"""
 
diff --git a/InvenTree/plugin/test_plugin.py b/InvenTree/plugin/test_plugin.py
index 953915841d..c8d51f4944 100644
--- a/InvenTree/plugin/test_plugin.py
+++ b/InvenTree/plugin/test_plugin.py
@@ -66,25 +66,29 @@ class PluginTagTests(TestCase):
 class InvenTreePluginTests(TestCase):
     """Tests for InvenTreePlugin."""
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Setup for all tests."""
-        self.plugin = InvenTreePlugin()
+
+        super().setUpTestData()
+
+        cls.plugin = InvenTreePlugin()
 
         class NamedPlugin(InvenTreePlugin):
             """a named plugin."""
             NAME = 'abc123'
 
-        self.named_plugin = NamedPlugin()
+        cls.named_plugin = NamedPlugin()
 
         class SimpleInvenTreePlugin(InvenTreePlugin):
             NAME = 'SimplePlugin'
 
-        self.plugin_simple = SimpleInvenTreePlugin()
+        cls.plugin_simple = SimpleInvenTreePlugin()
 
         class OldInvenTreePlugin(InvenTreePlugin):
             PLUGIN_SLUG = 'old'
 
-        self.plugin_old = OldInvenTreePlugin()
+        cls.plugin_old = OldInvenTreePlugin()
 
         class NameInvenTreePlugin(InvenTreePlugin):
             NAME = 'Aplugin'
@@ -97,8 +101,8 @@ class InvenTreePluginTests(TestCase):
             WEBSITE = 'https://aa.bb/cc'
             LICENSE = 'MIT'
 
-        self.plugin_name = NameInvenTreePlugin()
-        self.plugin_sample = SampleIntegrationPlugin()
+        cls.plugin_name = NameInvenTreePlugin()
+        cls.plugin_sample = SampleIntegrationPlugin()
 
         class VersionInvenTreePlugin(InvenTreePlugin):
             NAME = 'Version'
@@ -106,7 +110,7 @@ class InvenTreePluginTests(TestCase):
             MIN_VERSION = '0.1.0'
             MAX_VERSION = '0.1.3'
 
-        self.plugin_version = VersionInvenTreePlugin()
+        cls.plugin_version = VersionInvenTreePlugin()
 
     def test_basic_plugin_init(self):
         """Check if a basic plugin intis."""
diff --git a/InvenTree/stock/test_api.py b/InvenTree/stock/test_api.py
index 68fb75baaf..dc645e9eae 100644
--- a/InvenTree/stock/test_api.py
+++ b/InvenTree/stock/test_api.py
@@ -50,9 +50,10 @@ class StockLocationTest(StockAPITestCase):
 
     list_url = reverse('api-location-list')
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Setup for all tests."""
-        super().setUp()
+        super().setUpTestData()
 
         # Add some stock locations
         StockLocation.objects.create(name='top', description='top category')
@@ -1413,30 +1414,32 @@ class StockMergeTest(StockAPITestCase):
 
     URL = reverse('api-stock-merge')
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Setup for all tests."""
-        super().setUp()
 
-        self.part = part.models.Part.objects.get(pk=25)
-        self.loc = StockLocation.objects.get(pk=1)
-        self.sp_1 = company.models.SupplierPart.objects.get(pk=100)
-        self.sp_2 = company.models.SupplierPart.objects.get(pk=101)
+        super().setUpTestData()
 
-        self.item_1 = StockItem.objects.create(
-            part=self.part,
-            supplier_part=self.sp_1,
+        cls.part = part.models.Part.objects.get(pk=25)
+        cls.loc = StockLocation.objects.get(pk=1)
+        cls.sp_1 = company.models.SupplierPart.objects.get(pk=100)
+        cls.sp_2 = company.models.SupplierPart.objects.get(pk=101)
+
+        cls.item_1 = StockItem.objects.create(
+            part=cls.part,
+            supplier_part=cls.sp_1,
             quantity=100,
         )
 
-        self.item_2 = StockItem.objects.create(
-            part=self.part,
-            supplier_part=self.sp_2,
+        cls.item_2 = StockItem.objects.create(
+            part=cls.part,
+            supplier_part=cls.sp_2,
             quantity=100,
         )
 
-        self.item_3 = StockItem.objects.create(
-            part=self.part,
-            supplier_part=self.sp_2,
+        cls.item_3 = StockItem.objects.create(
+            part=cls.part,
+            supplier_part=cls.sp_2,
             quantity=50,
         )
 
diff --git a/InvenTree/stock/tests.py b/InvenTree/stock/tests.py
index 675cadadd2..e4c4914dd6 100644
--- a/InvenTree/stock/tests.py
+++ b/InvenTree/stock/tests.py
@@ -30,19 +30,20 @@ class StockTestBase(InvenTreeTestCase):
         'stock_tests',
     ]
 
-    def setUp(self):
+    @classmethod
+    def setUpTestData(cls):
         """Setup for all tests."""
-        super().setUp()
+        super().setUpTestData()
 
         # Extract some shortcuts from the fixtures
-        self.home = StockLocation.objects.get(name='Home')
-        self.bathroom = StockLocation.objects.get(name='Bathroom')
-        self.diningroom = StockLocation.objects.get(name='Dining Room')
+        cls.home = StockLocation.objects.get(name='Home')
+        cls.bathroom = StockLocation.objects.get(name='Bathroom')
+        cls.diningroom = StockLocation.objects.get(name='Dining Room')
 
-        self.office = StockLocation.objects.get(name='Office')
-        self.drawer1 = StockLocation.objects.get(name='Drawer_1')
-        self.drawer2 = StockLocation.objects.get(name='Drawer_2')
-        self.drawer3 = StockLocation.objects.get(name='Drawer_3')
+        cls.office = StockLocation.objects.get(name='Office')
+        cls.drawer1 = StockLocation.objects.get(name='Drawer_1')
+        cls.drawer2 = StockLocation.objects.get(name='Drawer_2')
+        cls.drawer3 = StockLocation.objects.get(name='Drawer_3')
 
         # Ensure the MPTT objects are correctly rebuild
         Part.objects.rebuild()