diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a01a53647..f69fa0b7d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -197,16 +197,19 @@ jobs:
               GOOS=js GOARCH=wasm go list std github.com/gopherjs/gopherjs/js/... github.com/gopherjs/gopherjs/tests/... \
               | grep -v -x -f .std_test_pkg_exclusions \
             )
+
+          echo "Packages to run:" ${PACKAGE_NAMES[@]}
           
+          PART_NUMBER=${{ matrix.part }}
           STRIDE=$((${#PACKAGE_NAMES[@]} / $NUMBER_OF_PARTS))
-          OFFSET=STRIDE*$((${{ matrix.part }} - 1))
-          if [ ${{ matrix.part }} -lt $NUMBER_OF_PARTS ]; then
+          OFFSET=STRIDE*$(($PART_NUMBER - 1))
+          if [ $PART_NUMBER -lt $NUMBER_OF_PARTS ]; then
               PACKAGE_NAMES_FOR_PART=${PACKAGE_NAMES[@]:OFFSET:STRIDE}
           else
               PACKAGE_NAMES_FOR_PART=${PACKAGE_NAMES[@]:OFFSET}
           fi
 
-          echo "Packages for part #${{ matrix.part }}:" $PACKAGE_NAMES_FOR_PART
+          echo "Packages for part #${{ matrix.part }}:" ${PACKAGE_NAMES_FOR_PART[@]}
 
           gopherjs test -p 2 --minify -v --short $PACKAGE_NAMES_FOR_PART