diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 41936c999c83..c04cdfb7b2d0 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -122,7 +122,7 @@ jobs:
           -e DEVELOPER=1 \
           -e EXPERIMENTAL_FEATURES=1 \
           -e COMPA=0 \
-          -e PYTEST_PAR=2 \
+          -e PYTEST_PAR=1 \
           -e PYTEST_OPTS="--timeout=300" \
           -e TEST_CMD="make check-protos" \
           -e TEST_GROUP=1 \