* tests/misc/sync.sh: Check 'sync fifo' with no arguments, -d, and -f
separately.
---
 tests/misc/sync.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/misc/sync.sh b/tests/misc/sync.sh
index b3785e0f3..a7cace6fd 100755
--- a/tests/misc/sync.sh
+++ b/tests/misc/sync.sh
@@ -52,7 +52,9 @@ fi
 if test "$fail" != '1'; then
   # Ensure a fifo doesn't block
   mkfifo_or_skip_ fifo
-  returns_ 124 timeout 10 sync fifo && fail=1
+  for opt in '' '-f' '-d'; do
+    returns_ 124 timeout 10 sync $opt fifo && fail=1
+  done
 fi
 
 Exit $fail
-- 
2.52.0


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