Index: test/tools/llvm-objcopy/Inputs/ungzip.py
===================================================================
--- test/tools/llvm-objcopy/Inputs/ungzip.py
+++ test/tools/llvm-objcopy/Inputs/ungzip.py
@@ -2,4 +2,12 @@
 import sys
 
 with gzip.open(sys.argv[1], 'rb') as f:
-  sys.stdout.write(f.read())
+  writer = getattr(sys.stdout, 'buffer', None)
+  if writer is None:
+    writer = sys.stdout
+    if sys.platform == "win32":
+      import os, msvcrt
+      msvcrt.setmode(sys.stdout.fileno(),os.O_BINARY)
+
+  writer.write(f.read())
+  sys.stdout.flush()