diff --git a/pyproject.toml b/pyproject.toml
index f4bee87..fd5abbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ pytest-cov = "^4.1.0"
 pytest-timeout = "^2.2.0"
 pytest-subtests = "^0.12.1"
 black = {extras = ["jupyter"], version = "^24.4.2"}
+pytest-mock = "^3.14.0"
 
 [tool.poetry.group.all]
 optional = true