diff --git a/tests/nota.cm b/tests/nota.cm
index 97d3c83f..c4846c14 100644
--- a/tests/nota.cm
+++ b/tests/nota.cm
@@ -39,7 +39,7 @@ function deepCompare(expected, actual, path) {
 
   if (is_blob(expected) && is_blob(actual)) {
     stone_if_needed(expected); stone_if_needed(actual)
-    if (expected.length != actual.length)
+    if (length(expected) != length(actual))
       return { passed: false, messages: [`blob length mismatch at ${path}: ${length(expected)} vs ${length(actual)}`] }
     for (var i = 0; i < length(expected); i++) {
       if (expected.read_logical(i) != actual.read_logical(i))
@@ -49,7 +49,7 @@ function deepCompare(expected, actual, path) {
   }
 
   if (is_array(expected) && is_array(actual)) {
-    if (expected.length != actual.length)
+    if (length(expected) != length(actual))
       return {
         passed: false,
         messages: [`Array length mismatch at ${path}: expected ${length(expected)}, got ${length(actual)}`]
@@ -60,7 +60,7 @@ function deepCompare(expected, actual, path) {
       if (!result.passed)
         messages = array(messages, result.messages)
     })
-    return { passed: messages.length == 0, messages: messages };
+    return { passed: length(messages) == 0, messages: messages };
   }
 
   if (is_object(expected) && is_object(actual)) {
@@ -77,7 +77,7 @@ function deepCompare(expected, actual, path) {
       if (!result.passed) 
         messages = array(messages, result.messages)
     })
-    return { passed: messages.length == 0, messages: messages };
+    return { passed: length(messages) == 0, messages: messages };
   }
 
   return {