diff --git a/llvm/test/tools/llvm-ar/mri-nonascii.test b/llvm/test/tools/llvm-ar/mri-nonascii.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-ar/mri-nonascii.test
@@ -0,0 +1,22 @@
+# Test non-ascii archive members
+# XFAIL: system-darwin
+
+RUN: rm -rf %t && mkdir -p %t/extracted
+
+# Note: lit's Python will read this UTF-8 encoded mri-nonascii.txt file,
+# decode it to unicode. The filename in the redirection below will then
+# be encoded in the system's filename encoding (e.g. UTF-16 for
+# Microsoft Windows).
+RUN: echo "contents" > %t/£.txt
+
+RUN: echo "CREATE %t/mri.ar" > %t/script.mri
+RUN: echo "ADDMOD %t/£.txt" >> %t/script.mri
+RUN: echo "SAVE" >> %t/script.mri
+
+RUN: llvm-ar -M < %t/script.mri
+RUN: cd %t/extracted && llvm-ar x %t/mri.ar
+
+# Same as above.
+RUN: FileCheck --strict-whitespace %s <£.txt
+CHECK:{{^}}
+CHECK-SAME:{{^}}contents{{$}}
diff --git a/llvm/test/tools/llvm-ar/mri-utf8.test b/llvm/test/tools/llvm-ar/mri-utf8.test
deleted file mode 100644
--- a/llvm/test/tools/llvm-ar/mri-utf8.test
+++ /dev/null
@@ -1,23 +0,0 @@
-# Test non-ascii archive members
-# XFAIL: system-darwin
-
-RUN: rm -rf %t && mkdir -p %t/extracted
-
-RUN: echo "contents" > %t/£.txt
-
-RUN: echo "CREATE %t/mri.ar" > %t/script.mri
-RUN: echo "ADDMOD %t/£.txt" >> %t/script.mri
-RUN: echo "SAVE" >> %t/script.mri
-
-RUN: llvm-ar -M < %t/script.mri
-RUN: cd %t/extracted && llvm-ar x %t/mri.ar
-
-# This works around problems launching processess that
-# include arguments with non-ascii characters.
-# Python on Linux defaults to ASCII encoding unless the
-# environment specifies otherwise, so it is explicitly set.
-# The reliance the test has on this locale is not ideal,
-# however alternate solutions have been difficult due to 
-# behaviour differences with python 2 vs python 3,
-# and linux vs windows.
-RUN: env LANG=en_US.UTF-8 %python -c "assert open(u'\U000000A3.txt', 'rb').read() == b'contents\n'"