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-rw-r--r--tests/tr/failures1
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/tr/failures b/tests/tr/failures
index 8e806dbef..defc474ce 100644
--- a/tests/tr/failures
+++ b/tests/tr/failures
@@ -14,5 +14,6 @@ tr a '' < /dev/null
tr -s '\432' < /dev/null
tr a 'abc\' < /dev/null
tr a '\x' < /dev/null
+tr -s < /dev/null
# And make sure tr does the right thing when POSIXLY_... is set.