diff --git a/.vsts-ci.yml b/.vsts-ci.yml
index a533ab1659e4..c72d3a2e2291 100644
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@@ -37,7 +37,6 @@ jobs:
       mpi_source:
         TASK: mpi
         METHOD: source
-        PYTHON_VERSION: 2.7
       gpu_source:
         TASK: gpu
         METHOD: source