diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 22324747..a0dc71ca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,7 +90,7 @@ jobs:
 
       - name: Run the diff
         run: |
-          DIFF_OUTPUT=$(diff current-image-report.txt previous-image-report.txt || true)
+          DIFF_OUTPUT=$(diff current-image-report.txt previous-image-report.txt | sed ':a;N;$!ba;s/\n/\\n/g' || true)
           echo "$DIFF_OUTPUT"
           
           echo "DIFF_OUTPUT<<EOF" >> $GITHUB_ENV