--- /dev/null
+#! /usr/bin/tclsh
+
+source mtest/common.tcl
+
+run-mss -Ppprefix --no-conf-key-prefix test-example/sites $tmp/out.conf
+
+set seddery { sed -n 's/^[ \t]*//; /^[^#]/p' }
+diff mtest/e-basic.conf $tmp/out.conf \
+ "sed -e 's/vpn/pprefixvpn/g; s/^all-sites/pprefix&/' | $seddery" \
+ $seddery