diff --git a/cpp/src/arrow/ipc/message_internal_test.cc b/cpp/src/arrow/ipc/message_internal_test.cc
index d39e57242475c..982088f10ecb9 100644
--- a/cpp/src/arrow/ipc/message_internal_test.cc
+++ b/cpp/src/arrow/ipc/message_internal_test.cc
@@ -50,9 +50,10 @@ TEST(TestMessageInternal, TestByteIdentical) {
 
   // Create a simple Schema with just one metadata KVP
   auto f0 = field("f0", int64());
-  std::vector<std::shared_ptr<Field>> fields = {f0};
+  auto f1 = field("f1", int64());
+  std::vector<std::shared_ptr<Field>> fields = {f0, f1};
   std::shared_ptr<KeyValueMetadata> metadata =
-      KeyValueMetadata::Make({"my_key"}, {"my_value"});
+      KeyValueMetadata::Make({"key_1", "key_2"}, {"key_1_value", "key_2_value"});
   auto schema = ::arrow::schema({f0}, metadata);
 
   // Serialize the Schema to a Buffer
@@ -60,22 +61,25 @@ TEST(TestMessageInternal, TestByteIdentical) {
   ASSERT_OK(WriteSchemaMessage(*schema, mapper, IpcWriteOptions::Defaults(), &outBuffer));
 
   // This is example output from macOS+ARM+LLVM
-  const uint8_t len = 184;
+  const uint8_t len = 228;
   const uint8_t expected[] = {
       0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x0E, 0x00, 0x06, 0x00, 0x05, 0x00,
       0x08, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x10, 0x00, 0x00, 0x00,
       0x00, 0x00, 0x0A, 0x00, 0x0C, 0x00, 0x00, 0x00, 0x04, 0x00, 0x08, 0x00, 0x0A, 0x00,
-      0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
-      0x0C, 0x00, 0x00, 0x00, 0x08, 0x00, 0x0C, 0x00, 0x04, 0x00, 0x08, 0x00, 0x08, 0x00,
-      0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
-      0x6D, 0x79, 0x5F, 0x76, 0x61, 0x6C, 0x75, 0x65, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
-      0x00, 0x00, 0x6D, 0x79, 0x5F, 0x6B, 0x65, 0x79, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
-      0x14, 0x00, 0x00, 0x00, 0x10, 0x00, 0x14, 0x00, 0x08, 0x00, 0x06, 0x00, 0x07, 0x00,
-      0x0C, 0x00, 0x00, 0x00, 0x10, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02,
-      0x10, 0x00, 0x00, 0x00, 0x1C, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
-      0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x66, 0x30, 0x00, 0x00, 0x08, 0x00, 0x0C, 0x00,
-      0x08, 0x00, 0x07, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x40, 0x00,
-      0x00, 0x00};
+      0x00, 0x00, 0x6C, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+      0x38, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xD8, 0xFF, 0xFF, 0xFF, 0x18, 0x00,
+      0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x0B, 0x00, 0x00, 0x00, 0x6B, 0x65, 0x79, 0x5F,
+      0x32, 0x5F, 0x76, 0x61, 0x6C, 0x75, 0x65, 0x00, 0x05, 0x00, 0x00, 0x00, 0x6B, 0x65,
+      0x79, 0x5F, 0x32, 0x00, 0x00, 0x00, 0x08, 0x00, 0x0C, 0x00, 0x04, 0x00, 0x08, 0x00,
+      0x08, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x0B, 0x00,
+      0x00, 0x00, 0x6B, 0x65, 0x79, 0x5F, 0x31, 0x5F, 0x76, 0x61, 0x6C, 0x75, 0x65, 0x00,
+      0x05, 0x00, 0x00, 0x00, 0x6B, 0x65, 0x79, 0x5F, 0x31, 0x00, 0x00, 0x00, 0x01, 0x00,
+      0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x10, 0x00, 0x14, 0x00, 0x08, 0x00, 0x06, 0x00,
+      0x07, 0x00, 0x0C, 0x00, 0x00, 0x00, 0x10, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x02, 0x10, 0x00, 0x00, 0x00, 0x1C, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x66, 0x30, 0x00, 0x00, 0x08, 0x00,
+      0x0C, 0x00, 0x08, 0x00, 0x07, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x40, 0x00, 0x00, 0x00};
   Buffer expectedBuffer(expected, len);
 
   ASSERT_TRUE(expectedBuffer.Equals(*outBuffer));