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-rwxr-xr-xtests/test-vfprintf-posix.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/test-vfprintf-posix.sh b/tests/test-vfprintf-posix.sh
index d8ced96bca..d5453e3f9c 100755
--- a/tests/test-vfprintf-posix.sh
+++ b/tests/test-vfprintf-posix.sh
@@ -7,7 +7,7 @@ tmpfiles="$tmpfiles t-vfprintf-posix.tmp t-vfprintf-posix.out"
${CHECKER} ./test-vfprintf-posix${EXEEXT} > t-vfprintf-posix.tmp || exit 1
LC_ALL=C tr -d '\r' < t-vfprintf-posix.tmp > t-vfprintf-posix.out || exit 1
-: ${DIFF=diff}
+: "${DIFF=diff}"
${DIFF} "${srcdir}/test-printf-posix.output" t-vfprintf-posix.out
result=$?