diff --git a/.github/workflows/spark_test.yaml b/.github/workflows/spark_test.yaml
index 1e573e64cf..cc6ae2e1e2 100644
--- a/.github/workflows/spark_test.yaml
+++ b/.github/workflows/spark_test.yaml
@@ -65,6 +65,6 @@ jobs:
         if: steps.git-diff.outputs.diff
       - name: Run Scala/Java and Python tests
         run: |
-          pipenv run python run-tests.py --group spark
+          TEST_PARALLELISM_COUNT=2 pipenv run python run-tests.py --group spark
           cd examples/scala && build/sbt "++ $SCALA_VERSION compile"
         if: steps.git-diff.outputs.diff