diff --git a/tests/tests.sh b/tests/tests.sh
index ac89705..37c49d9 100755
--- a/tests/tests.sh
+++ b/tests/tests.sh
@@ -99,9 +99,9 @@ $DATE > "$target"
 FAILED=
 echo "Performing tests:" 1>&2
 _test "hayes"
-_test "pdu"
 _test "ussd"
 echo "Expected failures:" 1>&2
+_fail "pdu"
 _fail "modems"
 _fail "plugins"
 if [ -n "$FAILED" ]; then