diff --git a/pyproject.toml b/pyproject.toml
index 7216393cd..f6bb47d63 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -110,6 +110,7 @@ test = [
     "ipywidgets", # symplot
     "nbmake",
     "numpy",
+    "pytest!=8.1.0", # https://github.com/treebeardtech/nbmake/issues/119
     "pytest",
     "pytest-cov",
     "pytest-profiling",