t/Makefile: retain cache t/.prove across prove runs

diff --git a/t/t0005-signals.sh b/t/t0005-signals.sh
index 09f855af3e9cded903c828f3f946a0c2403ddcdf..93e58c00e886db22b5ebf86af103efc4e65ec832 100755 (executable)
--- a/t/t0005-signals.sh
+++ b/t/t0005-signals.sh
@@ -13,6 +13,7 @@ test_expect_success 'sigchain works' '
        test-sigchain >actual
        case "$?" in
        143) true ;; # POSIX w/ SIGTERM=15
+       271) true ;; # ksh w/ SIGTERM=15
          3) true ;; # Windows
          *) false ;;
        esac &&