diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3041c184cc..35ccf246c0 100755
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -56,7 +56,7 @@ references:
        pip install -r requirements.txt --user
        sudo pip install -r docs/requirements.txt
        # sphinx-apidoc -o ./docs/source ./pytorch_lightning **/test_* --force --follow-links
-       cd docs; make clean ; make html
+       cd docs; make clean ; make html --debug --jobs 2
 
 jobs:
 
diff --git a/pytorch_lightning/trainer/evaluation_loop.py b/pytorch_lightning/trainer/evaluation_loop.py
index a16dea78ab..a00a228ba8 100644
--- a/pytorch_lightning/trainer/evaluation_loop.py
+++ b/pytorch_lightning/trainer/evaluation_loop.py
@@ -132,7 +132,7 @@ import torch
 from torch.utils.data import DataLoader
 from tqdm.auto import tqdm
 
-from pytorch_lightning import LightningModule
+from pytorch_lightning.core.lightning import LightningModule
 from pytorch_lightning.utilities.debugging import MisconfigurationException
 
 try:
diff --git a/pytorch_lightning/trainer/training_io.py b/pytorch_lightning/trainer/training_io.py
index 68645fdfbe..9cfe053729 100644
--- a/pytorch_lightning/trainer/training_io.py
+++ b/pytorch_lightning/trainer/training_io.py
@@ -101,8 +101,8 @@ from typing import Union
 import torch
 import torch.distributed as dist
 
+from pytorch_lightning.core.lightning import LightningModule
 from pytorch_lightning.loggers import LightningLoggerBase
-from pytorch_lightning import LightningModule
 from pytorch_lightning.overrides.data_parallel import (
     LightningDistributedDataParallel,
     LightningDataParallel,
diff --git a/pytorch_lightning/trainer/training_loop.py b/pytorch_lightning/trainer/training_loop.py
index 28761054b4..03df18510d 100644
--- a/pytorch_lightning/trainer/training_loop.py
+++ b/pytorch_lightning/trainer/training_loop.py
@@ -163,8 +163,8 @@ from typing import Union, List
 import numpy as np
 from torch.utils.data import DataLoader
 
+from pytorch_lightning.core.lightning import LightningModule
 from pytorch_lightning.loggers import LightningLoggerBase
-from pytorch_lightning import LightningModule
 from pytorch_lightning.utilities.debugging import MisconfigurationException
 from pytorch_lightning.callbacks.base import Callback