diff --git a/src/Resource/AccountingResource.php b/src/Resource/AccountingResource.php
index d17860d..c39836f 100644
--- a/src/Resource/AccountingResource.php
+++ b/src/Resource/AccountingResource.php
@@ -94,56 +94,6 @@ protected function makeRequest(string $method, string $url, array $data = null):
         return $responseData;
     }
 
-    /**
-     * Parse the json response for old-style accounting endpoint errors and create a FreshBooksException from it.
-     *
-     * @param  int $statusCode HTTP status code
-     * @param  array $responseData The json-parsed response
-     * @param  string $rawRespone The raw response body
-     * @return void
-     */
-    private function createOldResponseError(int $statusCode, array $responseData, string $rawRespone): void
-    {
-        $errors = $responseData['response']['errors'];
-        if (array_key_exists(0, $errors)) {
-            $message = $errors[0]['message'] ?? 'Unknown error';
-            $errorCode = $errors[0]['errno'] ?? null;
-            throw new FreshBooksException($message, $statusCode, null, $rawRespone, $errorCode, $errors);
-        }
-
-        $message = $errors['message'] ?? 'Unknown error';
-        $errorCode = $errors['errno'] ?? null;
-        throw new FreshBooksException($message, $statusCode, null, $rawRespone, $errorCode, $errors);
-    }
-
-    /**
-     * Parse the json response for new-style accounting endpoint errors and create a FreshBooksException from it.
-     *
-     * @param  int $statusCode HTTP status code
-     * @param  array $responseData The json-parsed response
-     * @param  string $rawRespone The raw response body
-     * @return void
-     */
-    private function createNewResponseError(int $statusCode, array $responseData, string $rawRespone): void
-    {
-        $message = $responseData['message'];
-        $errorCode = null;
-        $details = [];
-
-        foreach ($responseData['details'] as $detail) {
-            if (in_array('type.googleapis.com/google.rpc.ErrorInfo', $detail)) {
-                $errorCode = intval($detail['reason']) ?? null;
-                if (array_key_exists('metadata', $detail)) {
-                    $details[] = $detail['metadata'];
-                    if (array_key_exists('message', $detail['metadata'])) {
-                        $message = $detail['metadata']['message'];
-                    }
-                }
-            }
-        }
-        throw new FreshBooksException($message, $statusCode, null, $rawRespone, $errorCode, $details);
-    }
-
     /**
      * Create a FreshBooksException from the json response from the accounting endpoint.
      *
@@ -155,12 +105,17 @@ private function createNewResponseError(int $statusCode, array $responseData, st
     protected function handleError(int $statusCode, array $responseData, string $rawRespone): void
     {
         if (array_key_exists('response', $responseData) && array_key_exists('errors', $responseData['response'])) {
-            $this->createOldResponseError($statusCode, $responseData, $rawRespone);
-        } elseif (array_key_exists('message', $responseData) && array_key_exists('code', $responseData)) {
-            $this->createNewResponseError($statusCode, $responseData, $rawRespone);
-        } else {
-            throw new FreshBooksException('Unknown error', $statusCode, null, $rawRespone);
+            $errors = $responseData['response']['errors'];
+            if (array_key_exists(0, $errors)) {
+                $message = $errors[0]['message'] ?? 'Unknown error';
+                $errorCode = $errors[0]['errno'] ?? null;
+                throw new FreshBooksException($message, $statusCode, null, $rawRespone, $errorCode, $errors);
+            }
+            $message = $errors['message'] ?? 'Unknown error';
+            $errorCode = $errors['errno'] ?? null;
+            throw new FreshBooksException($message, $statusCode, null, $rawRespone, $errorCode, $errors);
         }
+        throw new FreshBooksException('Unknown error', $statusCode, null, $rawRespone);
     }
 
     private function rejectMissing(string $name): void
diff --git a/tests/Resource/AccountingResourceTest.php b/tests/Resource/AccountingResourceTest.php
index 42545cb..e07c14b 100644
--- a/tests/Resource/AccountingResourceTest.php
+++ b/tests/Resource/AccountingResourceTest.php
@@ -93,7 +93,7 @@ public function testGetWrongErrorContent(): void
         $resource->get($this->accountId, $clientId);
     }
 
-    public function testGetNotFoundOldError(): void
+    public function testGetNotFoundError(): void
     {
         $clientId = 12345;
         $mockHttpClient = $this->getMockHttpClient(
@@ -131,53 +131,6 @@ public function testGetNotFoundOldError(): void
         }
     }
 
-    public function testGetNotFoundNewError(): void
-    {
-        $clientId = 12345;
-        $mockHttpClient = $this->getMockHttpClient(
-            404,
-            [
-                'code' => 5,
-                'message' => 'Request failed with status_code: 404',
-                'details' => [
-                    [
-                        '@type' => 'type.googleapis.com/google.rpc.ErrorInfo',
-                        'reason' => '1012',
-                        'domain' => 'accounting.api.freshbooks.com',
-                        'metadata' => [
-                            'object' => 'client',
-                            'message' => 'Client not found.',
-                            'value' => '12345',
-                            'field' => 'userid'
-                        ]
-                    ]
-                ]
-            ]
-        );
-
-        $resource = new AccountingResource($mockHttpClient, 'users/clients', Client::class, ClientList::class);
-
-        try {
-            $resource->get($this->accountId, $clientId);
-            $this->fail('FreshBooksException was not thrown');
-        } catch (FreshBooksException $e) {
-            $this->assertSame('Client not found.', $e->getMessage());
-            $this->assertSame(404, $e->getCode());
-            $this->assertSame(1012, $e->getErrorCode());
-            $this->assertSame(
-                [
-                    [
-                        'object' => 'client',
-                        'message' => 'Client not found.',
-                        'value' => '12345',
-                        'field' => 'userid'
-                    ]
-                ],
-                $e->getErrorDetails()
-            );
-        }
-    }
-
     public function testList(): void
     {
         $clientId = 12345;