diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 9849431..f517e0f 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -164,6 +164,7 @@ add_test(Jtolower_test)
 add_test(JSON_number_handling_test)
 add_test(JAtoN_test)
 add_test(JNtoA_test)
+add_test(NoteResponseError_test)
 
 if(NOTE_C_COVERAGE)
     find_program(LCOV lcov REQUIRED)
diff --git a/test/src/NoteResponseError_test.cpp b/test/src/NoteResponseError_test.cpp
new file mode 100644
index 0000000..ef1c6f5
--- /dev/null
+++ b/test/src/NoteResponseError_test.cpp
@@ -0,0 +1,53 @@
+/*!
+ * @file NoteTransaction_test.cpp
+ *
+ * Written by the Blues Inc. team.
+ *
+ * Copyright (c) 2024 Blues Inc. MIT License. Use of this source code is
+ * governed by licenses granted by the copyright holder including that found in
+ * the
+ * <a href="https://github.com/blues/note-c/blob/master/LICENSE">LICENSE</a>
+ * file.
+ *
+ */
+
+#include <catch2/catch_test_macros.hpp>
+//#include "fff.h"
+
+#include "n_lib.h"
+#include "test_static.h"
+
+// DEFINE_FFF_GLOBALS
+// FAKE_VALUE_FUNC(bool, NoteReset)
+// FAKE_VALUE_FUNC(const char *, noteJSONTransaction, const char *, size_t, char **, uint32_t)
+// FAKE_VALUE_FUNC(bool, noteTransactionStart, uint32_t)
+// FAKE_VALUE_FUNC(J *, NoteUserAgent)
+// FAKE_VALUE_FUNC(bool, crcError, char *, uint16_t)
+
+
+SCENARIO("NoteResponseError")
+{
+    NoteSetFnDefault(malloc, free, NULL, NULL);
+
+    // // NoteReset's mock should succeed unless the test explicitly instructs
+    // // it to fail.
+    // NoteReset_fake.return_val = true;
+    // noteTransactionStart_fake.return_val = true;
+    // crcError_fake.return_val = false;
+
+    SECTION("No err field, returns false") {
+        J* rsp = JParse("{\"test\":\"me\"}");
+        //CHECK(rsp == NULL);
+        CHECK(!(NoteResponseError(rsp)));
+        JDelete(rsp);
+    }
+
+    SECTION("Supplying a response with err returns True") {
+        J* rsp = JParse("{\"err\":\"DFU mode is not yet fully active: starting communications {wait-module} {connecting} {dfu-not-ready}\"}\n");
+        bool hasError = NoteResponseError(rsp);
+        CHECK((hasError ==true && rsp != NULL));
+        JDelete(rsp);
+    }
+
+}
+