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-rw-r--r--tests/uniq/Test.pm2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/uniq/Test.pm b/tests/uniq/Test.pm
index 5fbf8736b..c254ef2c4 100644
--- a/tests/uniq/Test.pm
+++ b/tests/uniq/Test.pm
@@ -83,6 +83,8 @@ my @tv = (
['117', '--all-repeated=prepend', "a\na\nb\nc\nc\n", "\na\na\n\nc\nc\n", 0],
['118', '--all-repeated=prepend', "a\nb\n", "", 0],
['119', '--all-repeated=badoption', "a\n", "", 1],
+# Check that -d and -u suppress all output, as POSIX requires.
+['120', '-d -u', "a\na\n\b", "", 0],
);
sub test_vector