diff --git a/test/parsec.zig b/test/parsec.zig
index c8e16755df..9b3e8164fc 100644
--- a/test/parsec.zig
+++ b/test/parsec.zig
@@ -619,6 +619,17 @@ pub fn addCases(cases: &tests.ParseCContext) {
         \\    };
         \\}
     );
+
+    cases.addC("duplicate typedef",
+        \\typedef long foo;
+        \\typedef int bar;
+        \\typedef long foo;
+        \\typedef int baz;
+    ,
+        \\pub const foo = c_long;
+        \\pub const bar = c_int;
+        \\pub const baz = c_int;
+    );
 }