diff --git a/testdata/parser/negative/24.txt b/testdata/parser/negative/24.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5b99ecbf434acc3a8979524a0f480d748a081745
--- /dev/null
+++ b/testdata/parser/negative/24.txt
@@ -0,0 +1,3 @@
+Parse error at 24.pdl:8:9: Unassignable expression
+	x *= x * x *= 5;
+	       ^