diff --git a/azure-pipelines.yml b/azure-pipelines.yml
new file mode 100644
index 0000000..26e9fb3
--- /dev/null
+++ b/azure-pipelines.yml
@@ -0,0 +1,100 @@
+#
+trigger:
+  paths:
+    exclude:
+      - docs      
+jobs:
+  - job: Fairseq_unittests
+    timeoutInMinutes: 360
+    #pool:
+    #  vmImage: 'ubuntu-18.04'
+    pool: 
+      name: default
+      demands:
+        - agent.name -equals gpu4 
+    steps:
+    - script: |
+        #set up docker
+        sudo docker run --gpus all --privileged   -v '/datadrive/:/datadrive'  -it adsbrainwestus2.azurecr.io/fastseq:dev-py3 /bin/bash
+        #install fastseq
+        pip install --editable .
+      
+        #show environment
+        which python
+        python --version
+        which nvcc
+        nvcc --version
+        which fastseq
+        python -c "import torch; print('torch:', torch.__version__, torch)"
+        python -c "import torch; print('CUDA available:', torch.cuda.is_available())"
+        
+        #files chnaged in current PR
+        files_changed=$(git diff HEAD HEAD~ --name-only)        
+        echo "Files Edited in Current PR"
+        echo $files_changed
+        
+        export CUDA_VISIBLE_DEVICES=2,3
+        #check whether this PR is specific to fairseq/transformers/both.
+        #run PR specific unittests.
+        is_fairseq=$(echo $files_changed|grep fairseq)
+        is_transformers=$(echo $files_changed|grep transformers)
+        is_py_change=$(echo $files_changed|grep .py)
+        is_cpp_change=$(echo $files_changed|grep -e .cu -e .cpp)
+              
+        #purely fairseq change
+        if [ -n "$is_fairseq" -a -z "$is_transformers" ]
+        then
+          echo "Running Only fairseq unittests"
+          bash tests/run_fairseq_tests.sh
+        #purely transformers change
+        else if [ -z "$is_fairseq" -a -n "$is_transformers" ]
+        then
+          echo "Running Only transformers unittests"
+          bash tests/run_transformers_tests.sh
+        else if [ -n "$is_py_change" -o -n "$is_cpp_change" ]
+        then
+          echo "Running fairseq and transformers unittests"
+          bash tests/run_fairseq_tests.sh
+          bash tests/run_transformers_tests.sh
+        else
+          #bash tests/run_fairseq_tests.sh
+          #bash tests/run_transformers_tests.sh
+          echo " *** Skipping all unittests *** "
+          :
+        fi
+        fi
+        fi
+
+        #Linting checks for python files
+        if [ -n "$is_py_change" ]
+        then
+          #install pylint, wrapt update is essential.
+          conda update --name --yes base conda
+          conda update --yes wrapt
+          pip install pylint
+          echo $files_changed|grep .py|while read file; do
+            pylint --rcfile=.pylintrc $file
+          done
+        else 
+          :
+        fi
+        
+        #Linting checks for c++/cuda files
+        if [ -n "$is_cpp_change" ]
+        then
+          #install cpplint
+          pip install cpplint
+          echo $files_changed| grep .cpp|while read file; do
+            cpplint $file
+          done
+          echo $files_changed| grep .cu|while read file; do
+            cpplint $file
+          done
+        else 
+          :
+        fi
+        
+        #run benchmarks 
+        #cd benchmarks/
+        #CUDA_VISIBLE_DEVICES=3 run_all_benchmarks.sh
+      displayName: 'setup environment and run fairseq unit tests'  
diff --git a/fastseq/optimizer/fairseq/beam_search_optimizer.py b/fastseq/optimizer/fairseq/beam_search_optimizer.py
index 743e632..9dba51d 100644
--- a/fastseq/optimizer/fairseq/beam_search_optimizer.py
+++ b/fastseq/optimizer/fairseq/beam_search_optimizer.py
@@ -1,6 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
-
+###
 """Import the optimization for beam search related parts in FairSeq."""
 
 from packaging import version
diff --git a/tests/utils/test_file_utils.py b/tests/utils/test_file_utils.py
index 2b48a30..7910dd8 100644
--- a/tests/utils/test_file_utils.py
+++ b/tests/utils/test_file_utils.py
@@ -1,5 +1,6 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
+#
 
 """Test the file_util functions."""