diff --git a/.github/workflows/matrix-and-codecov-on-merge-to-main.yml b/.github/workflows/matrix-and-codecov-on-merge-to-main.yml
index ff207af..c2bf183 100644
--- a/.github/workflows/matrix-and-codecov-on-merge-to-main.yml
+++ b/.github/workflows/matrix-and-codecov-on-merge-to-main.yml
@@ -17,7 +17,6 @@ jobs:
       project: diffpy.srxplanar
       c_extension: false
       headless: false
-      python_version: 3.13
       run: |
         pip install diffpy.srxconfutils