Index: packages/Python/lldbsuite/test/lldbtest.py
===================================================================
--- packages/Python/lldbsuite/test/lldbtest.py
+++ packages/Python/lldbsuite/test/lldbtest.py
@@ -2240,7 +2240,7 @@
         filecheck_args = [filecheck_bin, check_file_abs]
         if filecheck_options:
             filecheck_args.append(filecheck_options)
-        subproc = Popen(filecheck_args, stdin=PIPE, stdout=PIPE, stderr=PIPE)
+        subproc = Popen(filecheck_args, stdin=PIPE, stdout=PIPE, stderr=PIPE, universal_newlines = True)
         cmd_stdout, cmd_stderr = subproc.communicate(input=output)
         cmd_status = subproc.returncode