diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2c0d33a244..03d6f625ac 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -671,6 +671,9 @@ jobs:
           path: dist/binary/borg.exe
 
       - name: Run tests
+        env:
+          MSYS2_ARG_CONV_EXCL: "*"
+          MSYS2_ENV_CONV_EXCL: "*"
         run: |
           # Ensure locally built binary in ./dist/binary/borg-dir is found during tests
           export PATH="$GITHUB_WORKSPACE/dist/binary/borg-dir:$PATH"