Merge test suite.
diff --git a/testsuite/false/false-is-silent b/testsuite/false/false-is-silent
new file mode 100644
index 0000000..8a9aa0c
--- /dev/null
+++ b/testsuite/false/false-is-silent
@@ -0,0 +1 @@
+busybox false 2>&1 | cmp - /dev/null