diff --git a/tests/t0001-null.sh b/tests/t0001-null.sh
new file mode 100755
index 0000000..acfc01b
--- /dev/null
+++ b/tests/t0001-null.sh
@@ -0,0 +1,101 @@
+#!/bin/sh
+
+test_description='todo.sh basic null functionality test.
+
+This test just makes sure the basic commands work,
+when there are no todos.
+'
+. ./test-lib.sh
+
+#
+# ls|list
+#
+cat > expect <<EOF
+--
+TODO: 0 of 0 tasks shown from $HOME/todo.txt
+EOF
+
+test_expect_success 'null ls' '
+    todo.sh ls > output && test_cmp expect output
+'
+test_expect_success 'null list' '
+    todo.sh list > output && test_cmp expect output
+'
+test_expect_success 'null list filter' '
+    todo.sh list filter > output && test_cmp expect output
+'
+
+#
+# lsp|listpri
+#
+# Re-use expect from ls.
+test_expect_success 'null lsp' '
+    todo.sh lsp > output && test_cmp expect output
+'
+test_expect_success 'null listpri' '
+    todo.sh listpri > output && test_cmp expect output
+'
+test_expect_success 'null listpri a' '
+    todo.sh listpri a > output && test_cmp expect output
+'
+
+#
+# lsa|listall
+#
+cat > expect <<EOF
+--
+TODO: 0 of 0 tasks shown from $HOME/todo.tmp
+EOF
+
+test_expect_success 'null lsa' '
+    todo.sh lsa > output && test_cmp expect output
+'
+test_expect_success 'null list' '
+    todo.sh listall > output && test_cmp expect output
+'
+test_expect_success 'null list filter' '
+    todo.sh listall filter > output && test_cmp expect output
+'
+
+
+#
+# lsc|listcon
+#
+test_expect_success 'null lsc' '
+    todo.sh lsc > output && ! test -s output
+'
+test_expect_success 'null listcon' '
+    todo.sh listcon > output && ! test -s output
+'
+
+#
+# lsprj|listproj
+#
+test_expect_success 'null lsprj' '
+    todo.sh lsprj > output && ! test -s output
+'
+test_expect_success 'null listproj' '
+    todo.sh listproj > output && ! test -s output
+'
+
+#
+# lf|listfile
+#
+cat > expect <<EOF
+TODO: File  does not exist.
+EOF
+# XXX really should give a better usage error message here.
+test_expect_success 'null lf' '
+    todo.sh lf > output || test_cmp expect output
+'
+test_expect_success 'null listfile' '
+    todo.sh listfile > output || test_cmp expect output
+'
+cat > expect <<EOF
+TODO: File foo.txt does not exist.
+EOF
+test_expect_success 'null listfile foo.txt' '
+    todo.sh listfile foo.txt > output || test_cmp expect output
+'
+
+test_done