diff --git a/tests/test_azure.py b/tests/test_azure.py
index d3907e0f..57b32231 100644
--- a/tests/test_azure.py
+++ b/tests/test_azure.py
@@ -508,7 +508,7 @@ def test_missing_file_handling(self):
         client_mock.exists.side_effect = [True, False]
         self.storage._client.get_blob_client.return_value = client_mock
 
-        file_that_exists = self.storage._open('file-that-exists')
+        file_that_exists = self.storage.open('file-that-exists')
         self.assertIsInstance(file_that_exists, azure_storage.AzureStorageFile)
 
-        self.assertRaises(FileNotFoundError, self.storage._open, 'file-that-does-not-exist')
+        self.assertRaises(FileNotFoundError, self.storage.open, 'file-that-does-not-exist')