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-rwxr-xr-xtests/tests.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/tests.sh b/tests/tests.sh
index 662efd9..f233f74 100755
--- a/tests/tests.sh
+++ b/tests/tests.sh
@@ -495,7 +495,7 @@ elif command -v expect_unbuffer &>/dev/null; then
fi
function bfs_pty() {
- test -n "$UNBUFFER" || skip
+ test -n "${UNBUFFER:-}" || skip
bfs_verbose "$@"
"$UNBUFFER" bash -c 'stty cols 80 rows 24 && "$@"' bash "${BFS[@]}" "$@"