diff --git a/test/src/unit-bjdata.cpp b/test/src/unit-bjdata.cpp
index e8477b268..3da723ee1 100644
--- a/test/src/unit-bjdata.cpp
+++ b/test/src/unit-bjdata.cpp
@@ -2151,6 +2151,41 @@ TEST_CASE("BJData")
             SaxCountdown scp(1);
             CHECK(!json::sax_parse(v, &scp, json::input_format_t::bjdata));
         }
+
+        SECTION("start_array() in ndarray _ArrayData_")
+        {
+            std::vector<uint8_t> v = {'{', '$', 'i', '#', '[', '$', 'i', '#', 'i', 2, 2, 1, 1, 2};
+            SaxCountdown scp(2);
+            CHECK(!json::sax_parse(v, &scp, json::input_format_t::bjdata));
+        }
+
+        SECTION("key() in ndarray _ArrayData_")
+        {
+            std::vector<uint8_t> v = {'{', '$', 'U', '#', '[', '$', 'U', '#', 'i', 2, 2, 2, 1, 2, 3, 4};
+            SaxCountdown scp(3);
+            CHECK(!json::sax_parse(v, &scp, json::input_format_t::bjdata));
+        }
+
+        SECTION("string() in ndarray _ArrayType_")
+        {
+            std::vector<uint8_t> v = {'{', '$', 'U', '#', '[', '$', 'i', '#', 'i', 2, 3, 2, 6, 5, 4, 3, 2, 1};
+            SaxCountdown scp(4);
+            CHECK(!json::sax_parse(v, &scp, json::input_format_t::bjdata));
+        }
+
+        SECTION("number_integer() in ndarray _ArraySize_")
+        {
+            std::vector<uint8_t> v = {'{', '$', 'U', '#', '[', 'i', 2, 'i', 3, ']', 6, 5, 4, 3, 2, 1};
+            SaxCountdown scp(7);
+            CHECK(!json::sax_parse(v, &scp, json::input_format_t::bjdata));
+        }
+
+        SECTION("start_array() in ndarray _ArraySize_")
+        {
+            std::vector<uint8_t> v = {'{', '$', 'U', '#', '[', 'i', 2, 'i', 3, ']', 6, 5, 4, 3, 2, 1};
+            SaxCountdown scp(9);
+            CHECK(!json::sax_parse(v, &scp, json::input_format_t::bjdata));
+        }
     }
 
     SECTION("parsing values")