diff --git a/pyproject.toml b/pyproject.toml
index 0216539..e3c9d12 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,6 +42,7 @@ dev = [
     'pytest~=7.0',
     'pytest-cov',
     'pytest-cases~=3.2',
+    'pytest-regressions',
     'ruamel.yaml',
 ]
 docs = [