diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index 90a4b1432..5944c38db 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -439,7 +439,10 @@ jobs:
         else
           echo "Detected tests " $tests
         fi
-        echo tests="$tests" >> "$GITHUB_OUTPUT"
+
+        echo 'tests<<EOF' >> $GITHUB_OUTPUT
+        echo "$tests" >> "$GITHUB_OUTPUT"
+        echo 'EOF' >> $GITHUB_OUTPUT
   test-flakyness:
     if: ${{ needs.test-flakyness-pre.outputs.tests != ''}}
     name: Test flakyness