diff --git a/tests/src/unit-32bit.cpp b/tests/src/unit-32bit.cpp
index 711dda5a0..25da44f4d 100644
--- a/tests/src/unit-32bit.cpp
+++ b/tests/src/unit-32bit.cpp
@@ -98,18 +98,14 @@ TEST_CASE("BJData")
     {
         SECTION("array")
         {
-            SECTION("optimized array: no size following type")
-            {
-                std::vector<uint8_t> v = {'[', '$', 'i', 2};
-                json _;
-                CHECK_THROWS_WITH_AS(_ = json::from_bjdata(v), "[json.exception.parse_error.112] parse error at byte 4: syntax error while parsing BJData size: expected '#' after type information; last byte: 0x02", json::parse_error&);
-            }
-
-            SECTION("optimized array: negative size")
+            SECTION("optimized array: integer value overflow")
             {
+                std::vector<uint8_t> vL = {'[', '#', 'L', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7F};
                 std::vector<uint8_t> vM = {'[', '$', 'M', '#', '[', 'I', 0x00, 0x20, 'M', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xFF, ']'};
 
                 json _;
+                CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vL), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
+
                 CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
             }
         }
diff --git a/tests/src/unit-bjdata.cpp b/tests/src/unit-bjdata.cpp
index 974ee3a0a..ab046a602 100644
--- a/tests/src/unit-bjdata.cpp
+++ b/tests/src/unit-bjdata.cpp
@@ -2649,14 +2649,27 @@ TEST_CASE("BJData")
                 CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vL), "[json.exception.parse_error.113] parse error at byte 11: syntax error while parsing BJData size: count in an optimized container must be positive", json::parse_error&);
                 CHECK(json::from_bjdata(vL, true, false).is_discarded());
 
-#if SIZE_MAX == 0xffffffff
-                CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
-#else
+#if SIZE_MAX != 0xffffffff
                 CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: excessive ndarray size caused overflow", json::out_of_range&);
 #endif
                 CHECK(json::from_bjdata(vM, true, false).is_discarded());
             }
 
+            SECTION("optimized array: integer value overflow")
+            {
+                std::vector<uint8_t> vL = {'[', '#', 'L', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7F};
+                std::vector<uint8_t> vM = {'[', '$', 'M', '#', '[', 'I', 0x00, 0x20, 'M', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xFF, ']'};
+
+                json _;
+#if SIZE_MAX == 0xffffffff
+                CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vL), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
+#endif
+
+#if SIZE_MAX == 0xffffffff
+                CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
+#endif
+            }
+
             SECTION("do not accept NTFZ markers in ndarray optimized type (with count)")
             {
                 json _;