diff --git a/t/100-args/all.do b/t/100-args/all.do
index bd750d9..c408ecc 100644
--- a/t/100-args/all.do
+++ b/t/100-args/all.do
@@ -1 +1,3 @@
 redo test.args test2.args passfailtest
+. ../skip-if-minimal-do.sh
+redo --old-args test.oldargs
diff --git a/t/100-args/default.oldargs.do b/t/100-args/default.oldargs.do
new file mode 100644
index 0000000..887cdd0
--- /dev/null
+++ b/t/100-args/default.oldargs.do
@@ -0,0 +1,5 @@
+# Note: this test expects to be run with 'redo --old-args' or it will fail.
+. ../skip-if-minimal-do.sh
+[ "$1" = "test" ]
+[ "$2" = ".oldargs" ]
+[ "$3" != "test.oldargs" ]