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diff --git a/t/redo-sh.tests/whichdo_absolute_default_2/test b/t/redo-sh.tests/whichdo_absolute_default_2/test
new file mode 100755
index 0000000..9b4024f
--- /dev/null
+++ b/t/redo-sh.tests/whichdo_absolute_default_2/test
@@ -0,0 +1,21 @@
+#!/bin/sh -eu
+# When invoked with an absolute filename for the file “default.do” as
+# an argument, redo-whichdo must not output that filename as possible
+# dofile.
+
+default_dofile="${PWD}/default.do"
+
+whichdo_dofiles=$(
+ redo-whichdo "${default_dofile}" \
+   |tr '\0' '\n'
+)
+
+for whichdo_dofile in ${whichdo_dofiles}; do
+ case "${whichdo_dofile}" in
+  "${default_dofile}")
+   >&2 printf 'redo-whichdo outputs that this file is its own dofile: %s\n' \
+    "${whichdo_dofile}"
+   exit 1
+  ;;
+ esac
+done