diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e80f3e1..621c14f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,6 +20,7 @@ jobs:
           EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
           echo "all_result<<$EOF" >> "$GITHUB_ENV"
           yarn all >> "$GITHUB_ENV" 2&>1 || true  # proceed even if yarn fails
+          echo >> "$GITHUB_ENV"  # yarn all doesn't necessarily produce a newline
           echo "$EOF" >> "$GITHUB_ENV"
         id: all
       - uses: ./