diff --git a/CHANGELOG.md b/CHANGELOG.md
index fcb21c01f4..36a87dddcb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 [#2003](https://github.com/plotly/dash/issues/2003) in which 
 `dangerously_allow_html=True` + `mathjax=True` works in some cases, and in some cases not.
 - [#2047](https://github.com/plotly/dash/pull/2047) Fix bug [#1979](https://github.com/plotly/dash/issues/1979) in which `DASH_DEBUG` as enviroment variable gets ignored.
+- [#2062](https://github.com/plotly/dash/pull/2062) Fix bug [#1933](https://github.com/plotly/dash/issues/1933) in which callbacks added via `dash.callback` in AIO components could not be tested using the `dash_duo` object.
 
 ### Changed
 
diff --git a/dash/dash.py b/dash/dash.py
index dcb873f5b8..1e52ce1309 100644
--- a/dash/dash.py
+++ b/dash/dash.py
@@ -1400,10 +1400,9 @@ def _setup_server(self):
                     "assigned with `app.callback`."
                 )
 
-            self.callback_map[k] = _callback.GLOBAL_CALLBACK_MAP.pop(k)
+            self.callback_map[k] = _callback.GLOBAL_CALLBACK_MAP[k]
 
         self._callback_list.extend(_callback.GLOBAL_CALLBACK_LIST)
-        _callback.GLOBAL_CALLBACK_LIST.clear()
 
     def _add_assets_resource(self, url_path, file_path):
         res = {"asset_path": url_path, "filepath": file_path}