diff --git a/.github/workflows/ci-testing.yml b/.github/workflows/ci-testing.yml
index bcc157b716..a93b02a266 100644
--- a/.github/workflows/ci-testing.yml
+++ b/.github/workflows/ci-testing.yml
@@ -1,8 +1,17 @@
 name: CI testing
 
 # see: https://help.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the master branch
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 # Trigger the workflow on push or pull request
-on: [push, pull_request]
+# on: [push, pull_request]
 
 jobs:
   build:
diff --git a/.mergify.yml b/.mergify.yml
index 3021251b91..53e65ac3d8 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -10,7 +10,7 @@ pull_request_rules:
       # no requested chnages from any reviewer
       - "#changes-requested-reviews-by=0"
       # this serves as ALL check has to pass as we have actually 27 tests in total
-      - "#status-success>=28"
+      - "#status-success>=29"
       # this is just in case since we rely on GPU tests (note: redundand to the above)
       - status-success=continuous-integration/drone/pr
       # this is patter-like, unofrunatly serves as `any(...)` (note: redundand to the above)
diff --git a/.pep8speaks.yml b/.pep8speaks.yml
index af1aa53b02..86a105c8b5 100644
--- a/.pep8speaks.yml
+++ b/.pep8speaks.yml
@@ -5,7 +5,7 @@ scanner:
     linter: pycodestyle  # Other option is flake8
 
 pycodestyle:  # Same as scanner.linter value. Other option is flake8
-    max-line-length: 110  # Default is 79 in PEP 8
+    max-line-length: 119  # Default is 79 in PEP 8
     ignore:  # Errors and warnings to ignore
         - W504  # line break after binary operator
         - E402  # module level import not at top of file
diff --git a/README.md b/README.md
index e6c8a48d21..0fa4b217b2 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@
 | Linux py3.6 [CPU] | [![CircleCI](https://circleci.com/gh/PyTorchLightning/pytorch-lightning.svg?style=svg)](https://circleci.com/gh/PyTorchLightning/pytorch-lightning) | [![CircleCI](https://circleci.com/gh/PyTorchLightning/pytorch-lightning.svg?style=svg)](https://circleci.com/gh/PyTorchLightning/pytorch-lightning) | [![CircleCI](https://circleci.com/gh/PyTorchLightning/pytorch-lightning.svg?style=svg)](https://circleci.com/gh/PyTorchLightning/pytorch-lightning) |
 | Linux py3.7 [GPU] | - | - | [![Build Status](http://35.192.60.23/api/badges/PyTorchLightning/pytorch-lightning/status.svg)](http://35.192.60.23/PyTorchLightning/pytorch-lightning) |
 | Linux py3.6 / py3.7 / py3.8 | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) | - | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) |
-| OSX py3.6 / py3.7 / py3.8 | - | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) |
+| OSX py3.6 / py3.7 | - | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) |
 | Windows py3.6 / py3.7 / py3.8 | [![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) |[![CI testing](https://github.com/PyTorchLightning/pytorch-lightning/workflows/CI%20testing/badge.svg?event=push)](https://github.com/PyTorchLightning/pytorch-lightning/actions?query=workflow%3A%22CI+testing%22) | - |
 
 </center>
diff --git a/pytorch_lightning/core/lightning.py b/pytorch_lightning/core/lightning.py
index faff115381..282521334a 100644
--- a/pytorch_lightning/core/lightning.py
+++ b/pytorch_lightning/core/lightning.py
@@ -9,6 +9,7 @@ from typing import Any, Callable, Dict, List, Optional, Tuple, Union, Sequence
 import torch
 import torch.distributed as torch_distrib
 from torch import Tensor
+from torch.nn import Module
 from torch.nn.parallel import DistributedDataParallel
 from torch.optim.optimizer import Optimizer
 from torch.utils.data import DataLoader
@@ -33,7 +34,7 @@ else:
 CHECKPOINT_KEY_MODULE_ARGS = 'module_arguments'
 
 
-class LightningModule(ABC, DeviceDtypeModuleMixin, GradInformation, ModelIO, ModelHooks, torch.nn.Module):
+class LightningModule(ABC, DeviceDtypeModuleMixin, GradInformation, ModelIO, ModelHooks, Module):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
diff --git a/tests/base/model_template.py b/tests/base/model_template.py
index ee5ea5ab13..1a5b1381fb 100644
--- a/tests/base/model_template.py
+++ b/tests/base/model_template.py
@@ -1,5 +1,3 @@
-from argparse import Namespace
-
 import torch
 import torch.nn as nn
 import torch.nn.functional as F
diff --git a/tests/base/utils.py b/tests/base/utils.py
index 467b5cb4fc..6690b18b80 100644
--- a/tests/base/utils.py
+++ b/tests/base/utils.py
@@ -1,5 +1,4 @@
 import os
-from argparse import Namespace
 
 import numpy as np
 import torch
diff --git a/tests/callbacks/test_progress_bar.py b/tests/callbacks/test_progress_bar.py
index 5786645371..e0dffce1f3 100644
--- a/tests/callbacks/test_progress_bar.py
+++ b/tests/callbacks/test_progress_bar.py
@@ -1,6 +1,5 @@
 import pytest
 
-import tests.base.utils as tutils
 from pytorch_lightning import Trainer
 from pytorch_lightning.callbacks import ProgressBarBase, ProgressBar, ModelCheckpoint
 from pytorch_lightning.utilities.exceptions import MisconfigurationException
diff --git a/tests/collect_env_details.py b/tests/collect_env_details.py
index ef34948f8e..30b6ebc9f3 100644
--- a/tests/collect_env_details.py
+++ b/tests/collect_env_details.py
@@ -5,9 +5,9 @@ This server mainly to get detail info for better bug reporting.
 """
 
 import os
+import platform
 import re
 import sys
-import platform
 
 import numpy
 import tensorboard
diff --git a/tests/loggers/test_base.py b/tests/loggers/test_base.py
index 1b5f5c54b6..5046991d7c 100644
--- a/tests/loggers/test_base.py
+++ b/tests/loggers/test_base.py
@@ -3,7 +3,6 @@ from unittest.mock import MagicMock
 
 import numpy as np
 
-import tests.base.utils as tutils
 from pytorch_lightning import Trainer
 from pytorch_lightning.loggers import LightningLoggerBase, LoggerCollection
 from pytorch_lightning.utilities import rank_zero_only
diff --git a/tests/loggers/test_neptune.py b/tests/loggers/test_neptune.py
index 7b552273bf..b12f4b40d3 100644
--- a/tests/loggers/test_neptune.py
+++ b/tests/loggers/test_neptune.py
@@ -2,7 +2,6 @@ from unittest.mock import patch, MagicMock
 
 import torch
 
-import tests.base.utils as tutils
 from pytorch_lightning import Trainer
 from pytorch_lightning.loggers import NeptuneLogger
 from tests.base import EvalModelTemplate
diff --git a/tests/loggers/test_trains.py b/tests/loggers/test_trains.py
index 8614ffa44b..ab35245449 100644
--- a/tests/loggers/test_trains.py
+++ b/tests/loggers/test_trains.py
@@ -1,6 +1,5 @@
 import pickle
 
-import tests.base.utils as tutils
 from pytorch_lightning import Trainer
 from pytorch_lightning.loggers import TrainsLogger
 from tests.base import EvalModelTemplate
diff --git a/tests/models/test_hparams.py b/tests/models/test_hparams.py
index 20999431f1..d1c28c9e8e 100644
--- a/tests/models/test_hparams.py
+++ b/tests/models/test_hparams.py
@@ -1,13 +1,14 @@
 import os
+import sys
 
 import pytest
 import torch
+from omegaconf import OmegaConf
+from packaging import version
 
 from pytorch_lightning import Trainer, LightningModule
 from pytorch_lightning.core.lightning import CHECKPOINT_KEY_MODULE_ARGS
 from tests.base import EvalModelTemplate
-from omegaconf import OmegaConf
-import sys
 
 
 class OmegaConfModel(EvalModelTemplate):
@@ -19,21 +20,21 @@ class OmegaConfModel(EvalModelTemplate):
 
 def test_class_nesting(tmpdir):
 
-    class Module(LightningModule):
+    class MyModule(LightningModule):
         def forward(self):
             return 0
 
     # make sure PL modules are always nn.Module
-    a = Module()
+    a = MyModule()
     assert isinstance(a, torch.nn.Module)
 
     def test_outside():
-        a = Module()
+        a = MyModule()
         print(a.module_arguments)
 
     class A:
         def test(self):
-            a = Module()
+            a = MyModule()
             print(a.module_arguments)
 
         def test2(self):
@@ -44,7 +45,7 @@ def test_class_nesting(tmpdir):
     A().test()
 
 
-@pytest.mark.skipif(sys.version_info < (3, 8), reason='OmegaConf only for Python >= 3.8')
+@pytest.mark.xfail(sys.version_info >= (3, 8), reason='OmegaConf only for Python >= 3.8')
 def test_omegaconf(tmpdir):
     conf = OmegaConf.create({"k": "v", "list": [15.4, {"a": "1", "b": "2"}]})
     model = OmegaConfModel(conf)
diff --git a/tests/test_deprecated.py b/tests/test_deprecated.py
index 79634578b7..57c72d3fd0 100644
--- a/tests/test_deprecated.py
+++ b/tests/test_deprecated.py
@@ -4,8 +4,6 @@ import sys
 import pytest
 
 from pytorch_lightning import Trainer
-
-import tests.base.utils as tutils
 from tests.base import EvalModelTemplate
 
 
diff --git a/tests/trainer/test_lr_finder.py b/tests/trainer/test_lr_finder.py
index e7733ae20f..61001f5c92 100755
--- a/tests/trainer/test_lr_finder.py
+++ b/tests/trainer/test_lr_finder.py
@@ -1,7 +1,6 @@
 import pytest
 import torch
 
-import tests.base.utils as tutils
 from pytorch_lightning import Trainer
 from pytorch_lightning.utilities.exceptions import MisconfigurationException
 from tests.base import EvalModelTemplate
diff --git a/tests/trainer/test_optimizers.py b/tests/trainer/test_optimizers.py
index fcd07fbb77..bf1b686296 100644
--- a/tests/trainer/test_optimizers.py
+++ b/tests/trainer/test_optimizers.py
@@ -1,7 +1,6 @@
 import pytest
 import torch
 
-import tests.base.utils as tutils
 from pytorch_lightning import Trainer
 from tests.base import EvalModelTemplate