diff --git a/libcxx/test/libcxx/selftest/dsl/dsl.sh.py b/libcxx/test/libcxx/selftest/dsl/dsl.sh.py
--- a/libcxx/test/libcxx/selftest/dsl/dsl.sh.py
+++ b/libcxx/test/libcxx/selftest/dsl/dsl.sh.py
@@ -6,8 +6,6 @@
 #
 #===----------------------------------------------------------------------===##
 
-# XFAIL: LIBCXX-WINDOWS-FIXME
-
 # Note: We prepend arguments with 'x' to avoid thinking there are too few
 #       arguments in case an argument is an empty string.
 # RUN: %{python} %s x%S x%T x%{substitutions}
diff --git a/libcxx/utils/libcxx/test/dsl.py b/libcxx/utils/libcxx/test/dsl.py
--- a/libcxx/utils/libcxx/test/dsl.py
+++ b/libcxx/utils/libcxx/test/dsl.py
@@ -95,6 +95,10 @@
     res = ('', res.output, 127, None)
   (out, err, exitCode, timeoutInfo) = res
 
+  if platform.system() == 'Windows':
+    out = out.replace('\r\n', '\n')
+    err = err.replace('\r\n', '\n')
+
   # TODO: As a temporary workaround until https://reviews.llvm.org/D81892 lands, manually
   #       split any stderr output that is included in stdout. It shouldn't be there, but
   #       the Lit internal shell conflates stderr and stdout.