diff --git a/src/protocol/tests/parser_validation.rs b/src/protocol/tests/parser_validation.rs
index 14c1bb9856a7ad5c1a8fa2b9bc1ab77803786980..863a9b294fd694e58c142ac58e70bc296ebfbd55 100644
--- a/src/protocol/tests/parser_validation.rs
+++ b/src/protocol/tests/parser_validation.rs
@@ -350,4 +350,26 @@ fn test_incorrect_union_instance() {
         .assert_msg_has(1, "has been resolved to 's32'")
         .assert_msg_has(1, "has been resolved to 'bool'");
     });
+}
+
+#[test]
+fn test_polymorph_array_types() {
+    Tester::new_single_source_expect_ok(
+        "array of polymorph in struct",
+        "
+        struct Foo<T> { T[] hello }
+        struct Bar { Foo<u32>[] world }
+        "
+    ).for_struct("Bar", |s| { s
+        .for_field("world", |f| { f.assert_parser_type("Foo<u32>[]"); });
+    });
+
+    Tester::new_single_source_expect_ok(
+        "array of port in struct",
+        "
+        struct Bar { in<u32>[] inputs }
+        "
+    ).for_struct("Bar", |s| { s
+        .for_field("inputs", |f| { f.assert_parser_type("in<u32>[]"); });
+    });
 }
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