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-rw-r--r--llvm/test/FileCheck/lit.local.cfg5
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/test/FileCheck/lit.local.cfg b/llvm/test/FileCheck/lit.local.cfg
index 307da456c38..1191450c655 100644
--- a/llvm/test/FileCheck/lit.local.cfg
+++ b/llvm/test/FileCheck/lit.local.cfg
@@ -1,3 +1,8 @@
+import lit
+
+# Use lit's internal shell to help guarantee test portability.
+config.test_format = lit.formats.ShTest(execute_external=False)
+
# Unset environment variables that the FileCheck tests
# expect not to be set.
file_check_expected_unset_vars = [
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