diff --git a/.github/workflows/test_on_schedule.yml b/.github/workflows/test_on_schedule.yml
index 2522ca6..d4e36d7 100644
--- a/.github/workflows/test_on_schedule.yml
+++ b/.github/workflows/test_on_schedule.yml
@@ -1,6 +1,7 @@
 name: Test on schedule
 
 on:
+  pull_request:
   schedule:
     - cron: "0 0 * * *"
 
@@ -37,6 +38,7 @@ jobs:
       - name: Test with unittest
         env:
           HTTPS_PROXY: ""
+          PYTHONIOENCODING: "utf-8"
         run: |
           cd tests/
           bash run_tests.sh