diff --git a/src/connector/helpers/data-chunking.spec.ts b/src/connector/helpers/data-chunking.spec.ts
new file mode 100644
index 00000000..a0df2fe6
--- /dev/null
+++ b/src/connector/helpers/data-chunking.spec.ts
@@ -0,0 +1,29 @@
+import { Chunked } from './data-chunking'
+
+describe('Data chunking', () => {
+  it('should reassemble chunked message with invalid message hash', async () => {
+    const chunked = Chunked({
+      packageType: 'metaData',
+      messageId: '7a2f41a0-e1cd-469b-a756-872fa738d660',
+      chunkCount: 1,
+      hashOfMessage:
+        'dea5b14b17eaadb9b2ee02bcc9d11fe60acfe99006cd55ae067aa448cd47d096',
+      messageByteCount: 439,
+    })
+    chunked.addChunk({
+      packageType: 'chunk',
+      messageId: '7a2f41a0-e1cd-469b-a756-872fa738d660',
+      chunkIndex: 0,
+      chunkData:
+        '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',
+    })
+
+    const result = chunked.allChunksReceived()
+    if (result.isErr()) throw result.error
+
+    expect(result.value).toBe(true)
+
+    const validResult = await chunked.validate()
+    expect(validResult.isErr()).toBeTruthy()
+  })
+})
diff --git a/src/connector/helpers/data-chunking.ts b/src/connector/helpers/data-chunking.ts
index 14d4cc74..1f1ef9a2 100644
--- a/src/connector/helpers/data-chunking.ts
+++ b/src/connector/helpers/data-chunking.ts
@@ -105,11 +105,16 @@ export const Chunked = (metaData: MetaData) => {
   const validate = () =>
     concatChunks()
       .asyncAndThen(sha256)
-      .andThen((sha256Hash) =>
-        sha256Hash.toString('hex') === metaData.hashOfMessage
+      .andThen((sha256Hash) => {
+        const expectedHash = sha256Hash.toString('hex')
+        return expectedHash === metaData.hashOfMessage
           ? ok(undefined)
-          : err(Error('chunked message hash does not match expected hash'))
-      )
+          : err(
+              Error(
+                `message hash "${metaData.hashOfMessage}" does not match expected hash "${expectedHash}"`
+              )
+            )
+      })
 
   const getMessage = () =>
     allChunksReceived().asyncAndThen(validate).andThen(concatChunks)