diff --git a/pyproject.toml b/pyproject.toml
index 6cf44d2..933bf35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ main = "https://github.com/ronny-rentner/ultradict"
 
 
 [project.optional-dependencies]
-tests = ["ultraimport", "redis"]
+tests = ["pytest", "ultraimport", "redis"]
 
 [tool.pylint.'MESSAGES CONTROL']
 max-line-length = 140