diff --git a/testdata/parser/negative/22.txt b/testdata/parser/negative/22.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2256dd6e96da539dd0930ae936e867af55dff358
--- /dev/null
+++ b/testdata/parser/negative/22.txt
@@ -0,0 +1,3 @@
+Parse error at 22.pdl:7:1: Duplicate label
+dupl:	while (a < 10) {
+^