diff --git a/test/fix/test_ale_fix.vader b/test/fix/test_ale_fix.vader
index 7e0ea33f..c630ab2a 100644
--- a/test/fix/test_ale_fix.vader
+++ b/test/fix/test_ale_fix.vader
@@ -156,7 +156,7 @@ Before:
   endfunction
 
   function! JSONPostProcessor(buffer, output) abort
-    return json_decode(a:output[0]).output
+    return json_decode(join(split(a:output[0]))).output
   endfunction
 
 After: