diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 9a7b15f79..4e03793f5 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -43,7 +43,11 @@ jobs:
         run: |
           tests=("command-line-options" "data-rep" "i18n_sjis" "jp-compat" "run" "syntax" "cobj-idx" "file-lock" "file-lock2" "misc")
           for test in "${tests[@]}"; do
-            ./"$test" || true
+            if [ "$test" = "file-lock" ] || [ "$test" = "file-lock2" ] || [ "$test" = "cobj-idx" ]; then
+              ./"$test" || true
+            else
+              ./"$test" -j || true
+            fi
           done
 
       - name: Generate a coverage report
diff --git a/.github/workflows/test-other.yml b/.github/workflows/test-other.yml
index b5ed1b2d1..7856e38c1 100644
--- a/.github/workflows/test-other.yml
+++ b/.github/workflows/test-other.yml
@@ -75,8 +75,12 @@ jobs:
       
       - name: Run tests ${{ inputs.test-name }}
         working-directory: tests/
-        run:
-          ./${{ inputs.test-name }}
+        run: |
+          if [ "${{ inputs.test-name }}" = "file-lock" ] || [ "${{ inputs.test-name }}" = "file-lock2" ] || [ "${{ inputs.test-name }}" = "cobj-idx" ]; then
+            ./${{ inputs.test-name }}
+          else
+            ./${{ inputs.test-name }} -j
+          fi
       
       - name: Upload log files if tests fail
         if: failure()