diff --git a/binder/requirements.txt b/binder/requirements.txt
index 6ebde05a..6b15e076 100644
--- a/binder/requirements.txt
+++ b/binder/requirements.txt
@@ -3,3 +3,4 @@ pandas
 matplotlib
 ipywidgets
 ipykernel
+ansicolors
diff --git a/papermill/tests/test_execute.py b/papermill/tests/test_execute.py
index f41232c2..9d9b181e 100644
--- a/papermill/tests/test_execute.py
+++ b/papermill/tests/test_execute.py
@@ -6,12 +6,13 @@
 from functools import partial
 from pathlib import Path
 from unittest.mock import ANY, patch
+from colors import strip_color
 
 import nbformat
 from nbformat import validate
 
 from .. import engines, translators
-from ..exceptions import PapermillExecutionError, strip_color
+from ..exceptions import PapermillExecutionError
 from ..execute import execute_notebook
 from ..iorw import load_notebook_node
 from ..log import logger