diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 890226e..8744436 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,3 +8,11 @@ repos:
       args: [ --fix ]
     # Run the formatter.
     - id: ruff-format
+
+- repo: local
+  hooks:
+    - id: pytest
+      name: pytest
+      entry: .venv/bin/pytest
+      language: script
+      files: \.py$