diff --git a/testdata/parser/negative/13.txt b/testdata/parser/negative/13.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e3dc7b18f329a5303a00270962226dc2c67e6f25
--- /dev/null
+++ b/testdata/parser/negative/13.txt
@@ -0,0 +1,3 @@
+Parse error at 13.pdl:8:16: Function definition must return
+			if (x == 0) skip; // illegal!
+			            ^