diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
index d3659b7..f46bf5c 100644
--- a/.github/workflows/run_test.yml
+++ b/.github/workflows/run_test.yml
@@ -43,6 +43,7 @@ jobs:
         mkvmerge -h
         mkvpropedit -h
         echo "PATH: $env:PATH"
+        echo "C:\Program Files (x86)\MKVToolNix" >> $GITHUB_PATH
 
     - name: Install pytest
       run: |