diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index be6d0971..bd22cb8f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,6 @@ jobs:
       - name: Run unit tests
         shell: bash -l {0}
         run: |
-          pip install -i https://test.pypi.org/simple/ onnx==1.15.0rc2
           pip install .
           pytest
 
@@ -74,7 +73,6 @@ jobs:
       - name: Run code generation
         shell: bash -l {0}
         run: |
-          pip install -i https://test.pypi.org/simple/ onnx==1.15.0rc2
           pip install .
           pip install pandoc
           python tools/generate_opset.py