diff --git a/.azure-pipelines/linux-CI-keras-applications-nightly.yml b/.azure-pipelines/linux-CI-keras-applications-nightly.yml
index fe9b1ef6..248210b6 100644
--- a/.azure-pipelines/linux-CI-keras-applications-nightly.yml
+++ b/.azure-pipelines/linux-CI-keras-applications-nightly.yml
@@ -16,7 +16,7 @@ jobs:
     matrix:
       Python36-onnx1.2:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.2.3
+        ONNX_PATH: pip install onnx==1.2.3
         INSTALL_KERAS: pip install keras==2.1.6
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.15.0
@@ -27,7 +27,7 @@ jobs:
 
       Python36-onnx1.5:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.5.0
+        ONNX_PATH: pip install onnx==1.5.0
         INSTALL_KERAS: pip install keras==2.2.4
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.15.0
@@ -38,7 +38,7 @@ jobs:
 
       Python37:
         python.version: '3.7.3'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         INSTALL_KERAS: pip install keras==2.3.1
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.15.0
@@ -49,7 +49,7 @@ jobs:
 
       Python37-official-ort:
         python.version: '3.7.3'
-        ONNX_PATH: onnx==1.6.0
+        ONNX_PATH: pip install onnx==1.6.0
         INSTALL_KERAS: pip install keras==2.3.1
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.15.0
@@ -60,7 +60,7 @@ jobs:
 
       Python38-tf2:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         INSTALL_KERAS:
         UNINSTALL_KERAS: pip uninstall keras -y
         INSTALL_TENSORFLOW: pip install tensorflow==2.2.0
@@ -84,7 +84,7 @@ jobs:
   - script: |
       python -m pip install --upgrade pip
       conda config --set always_yes yes --set changeps1 no
-      pip install $(ONNX_PATH)
+      $(ONNX_PATH)
       pip install h5py==2.9.0
       $(INSTALL_TENSORFLOW)
       $(INSTALL_KERAS)
diff --git a/.azure-pipelines/linux-conda-CI-tf-keras.yml b/.azure-pipelines/linux-conda-CI-tf-keras.yml
index ff490945..6c6baaf8 100644
--- a/.azure-pipelines/linux-conda-CI-tf-keras.yml
+++ b/.azure-pipelines/linux-conda-CI-tf-keras.yml
@@ -16,31 +16,31 @@ jobs:
       # No python 2.x since tf2onnx does not support it
       Python36-onnx1.2:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.2.3
+        ONNX_PATH: pip install onnx==1.2.3
         TENSORFLOW_PATH: tensorflow==1.11.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python36-onnx1.5:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.5.0
+        ONNX_PATH: pip install onnx==1.5.0
         TENSORFLOW_PATH: tensorflow==1.15.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python37:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.6.0
+        ONNX_PATH: pip install onnx==1.6.0
         TENSORFLOW_PATH: tensorflow-cpu==2.1.0
         INSTALL_ORT: pip install onnxruntime==1.4.0
 
       Python38:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.7.0
+        ONNX_PATH: pip install onnx==1.7.0
         TENSORFLOW_PATH: tensorflow-cpu==2.2.0
         INSTALL_ORT:
 
       Python38-tf2.3:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         TENSORFLOW_PATH: tensorflow-cpu==2.3.0
         INSTALL_ORT: pip install onnxruntime==1.7.0
 
@@ -59,7 +59,7 @@ jobs:
   - script: |
       python -m pip install --upgrade pip
       conda config --set always_yes yes --set changeps1 no
-      pip install $(ONNX_PATH)
+      $(ONNX_PATH)
       pip install h5py==2.9.0
       pip install $(TENSORFLOW_PATH)
       pip install git+https://github.com/microsoft/onnxconverter-common
diff --git a/.azure-pipelines/linux-conda-CI.yml b/.azure-pipelines/linux-conda-CI.yml
index 3936920d..ce2bfd94 100644
--- a/.azure-pipelines/linux-conda-CI.yml
+++ b/.azure-pipelines/linux-conda-CI.yml
@@ -15,21 +15,21 @@ jobs:
     matrix:
       Python36-tf1110:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.2.3
+        ONNX_PATH: pip install onnx==1.2.3
         KERAS: keras==2.1.6
         TENSORFLOW_PATH: tensorflow==1.11.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python36-tf1150:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.5.0
+        ONNX_PATH: pip install onnx==1.5.0
         KERAS: keras==2.2.5
         TENSORFLOW_PATH: tensorflow==1.15.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python37-tf1150:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         KERAS: keras==2.4.3
         TENSORFLOW_PATH: tensorflow==1.15.0
         INSTALL_ORT: pip install onnxruntime==1.6.0
@@ -37,7 +37,7 @@ jobs:
       # UT for keras 2.3 need tensorflow <= 2.0.0 
       Python37-tf200:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.6.0
+        ONNX_PATH: pip install onnx==1.6.0
         KERAS: keras==2.3.1
         TENSORFLOW_PATH: tensorflow==2.0.0
         INSTALL_ORT: pip install onnxruntime==1.4.0
@@ -45,7 +45,7 @@ jobs:
       # ORT hasn't support Python 3.8 yet.
       Python38-tf220:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.7.0
+        ONNX_PATH: pip install onnx==1.7.0
         KERAS: keras==2.4.3
         TENSORFLOW_PATH: tensorflow==2.2.0
         INSTALL_ORT:
@@ -65,7 +65,7 @@ jobs:
   - script: |
       python -m pip install --upgrade pip
       conda config --set always_yes yes --set changeps1 no
-      pip install $(ONNX_PATH)
+      $(ONNX_PATH)
       pip install h5py==2.9.0
       pip install $(TENSORFLOW_PATH)
       pip install $(KERAS)
diff --git a/.azure-pipelines/win32-CI-keras-applications-nightly.yml b/.azure-pipelines/win32-CI-keras-applications-nightly.yml
index 86fb27a4..fdc5dace 100644
--- a/.azure-pipelines/win32-CI-keras-applications-nightly.yml
+++ b/.azure-pipelines/win32-CI-keras-applications-nightly.yml
@@ -17,7 +17,7 @@ jobs:
       # No python 2.x since no available ONNX package for Windows
       Python36-onnx1.2:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.2.3
+        ONNX_PATH: pip install onnx==1.2.3
         INSTALL_KERAS: pip install keras==2.1.6
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.14.0
@@ -28,7 +28,7 @@ jobs:
 
       Python36-onnx1.5:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.5.0
+        ONNX_PATH: pip install onnx==1.5.0
         INSTALL_KERAS: pip install keras==2.2.4
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.14.0
@@ -39,7 +39,7 @@ jobs:
 
       Python37:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         INSTALL_KERAS: pip install keras==2.3.1
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.14.0
@@ -50,7 +50,7 @@ jobs:
 
       Python37-official-ort:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.6.0
+        ONNX_PATH: pip install onnx==1.6.0
         INSTALL_KERAS: pip install keras==2.3.1
         UNINSTALL_KERAS:
         INSTALL_TENSORFLOW: pip install tensorflow==1.14.0
@@ -61,7 +61,7 @@ jobs:
 
       Python38-tf2:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         INSTALL_KERAS:
         UNINSTALL_KERAS: pip uninstall keras -y
         INSTALL_TENSORFLOW: pip install tensorflow==2.2.0
@@ -88,7 +88,7 @@ jobs:
       call activate py$(python.version)
       python -m pip install --upgrade pip numpy
       echo Test numpy installation... && python -c "import numpy"
-      pip install %ONNX_PATH%
+      %ONNX_PATH%
       pip install h5py==2.9.0
       %INSTALL_TENSORFLOW%
       %INSTALL_KERAS%
diff --git a/.azure-pipelines/win32-conda-CI-tf-keras.yml b/.azure-pipelines/win32-conda-CI-tf-keras.yml
index 834c2b1c..6e964b84 100644
--- a/.azure-pipelines/win32-conda-CI-tf-keras.yml
+++ b/.azure-pipelines/win32-conda-CI-tf-keras.yml
@@ -16,31 +16,31 @@ jobs:
       # No python 2.x since no available ONNX package for Windows
       Python36-onnx1.2:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.2.3
+        ONNX_PATH: pip install onnx==1.2.3
         TENSORFLOW_PATH: tensorflow==1.11.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python36-onnx1.5:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.5.0
+        ONNX_PATH: pip install onnx==1.5.0
         TENSORFLOW_PATH: tensorflow==1.14.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python37:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.6.0
+        ONNX_PATH: pip install onnx==1.6.0
         TENSORFLOW_PATH: tensorflow-cpu==2.1.0
         INSTALL_ORT: pip install onnxruntime==1.4.0
 
       Python38:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.7.0
+        ONNX_PATH: pip install onnx==1.7.0
         TENSORFLOW_PATH: tensorflow-cpu==2.2.0
         INSTALL_ORT:
 
       Python38-tf2.3:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         TENSORFLOW_PATH: tensorflow-cpu==2.3.0
         INSTALL_ORT: pip install onnxruntime==1.7.0
 
@@ -62,7 +62,7 @@ jobs:
       call activate py$(python.version)
       python -m pip install --upgrade pip numpy
       echo Test numpy installation... && python -c "import numpy"
-      pip install %ONNX_PATH%
+      %ONNX_PATH%
       pip install h5py==2.9.0
       pip install %TENSORFLOW_PATH%
       pip install git+https://github.com/microsoft/onnxconverter-common
diff --git a/.azure-pipelines/win32-conda-CI.yml b/.azure-pipelines/win32-conda-CI.yml
index ac2452fc..685bb720 100644
--- a/.azure-pipelines/win32-conda-CI.yml
+++ b/.azure-pipelines/win32-conda-CI.yml
@@ -16,14 +16,14 @@ jobs:
       # No python 2.x since no available ONNX package for Windows
       Python36-tf1110:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.2.3
+        ONNX_PATH: pip install onnx==1.2.3
         KERAS: keras==2.1.6
         TENSORFLOW_PATH: tensorflow==1.11.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
 
       Python36-tf1140:
         python.version: '3.6'
-        ONNX_PATH: onnx==1.5.0
+        ONNX_PATH: pip install onnx==1.5.0
         KERAS: keras==2.2.5
         TENSORFLOW_PATH: tensorflow==1.15.0
         INSTALL_ORT: pip install onnxruntime==1.1.1
@@ -31,14 +31,14 @@ jobs:
       # UT for keras 2.3 need tensorflow <= 2.0.0
       Python37-tf200:
         python.version: '3.7'
-        ONNX_PATH: onnx==1.7.0
+        ONNX_PATH: pip install onnx==1.7.0
         KERAS: keras==2.3.1
         TENSORFLOW_PATH: tensorflow==2.0.0
         INSTALL_ORT: pip install onnxruntime==1.4.0
 
       Python38-tf220:
         python.version: '3.8'
-        ONNX_PATH: onnx==1.8.0
+        ONNX_PATH: pip install -i https://test.pypi.org/simple/ onnx
         KERAS: keras==2.4.3
         TENSORFLOW_PATH: tensorflow==2.2.0
         INSTALL_ORT:
@@ -61,7 +61,7 @@ jobs:
       call activate py$(python.version)
       python -m pip install --upgrade pip numpy
       echo Test numpy installation... && python -c "import numpy"
-      pip install %ONNX_PATH%
+      %ONNX_PATH%
       pip install h5py==2.9.0
       pip install %TENSORFLOW_PATH%
       pip install %KERAS%