diff --git a/openmp/runtime/test/lit.cfg b/openmp/runtime/test/lit.cfg
--- a/openmp/runtime/test/lit.cfg
+++ b/openmp/runtime/test/lit.cfg
@@ -76,7 +76,7 @@
   cmd = subprocess.Popen(['xcrun', '--show-sdk-path'],
                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)
   out, err = cmd.communicate()
-  out = out.strip()
+  out = out.strip().decode()
   res = cmd.wait()
   if res == 0 and out:
     config.test_flags += " -isysroot " + out