diff --git a/justfile b/justfile
index dca1e7f..33bf5c5 100644
--- a/justfile
+++ b/justfile
@@ -1,4 +1,4 @@
-default: versioned
+default: versioned validate
 
 all: files kernels unique packages
 
@@ -17,3 +17,7 @@ packages:
 versioned:
     datalad run -m "Create updated output data" -i input/ -o output/ just all
     printf "\n## %s\n\n- auto generated\n" $(date +%F) | sed -i '/CHANGELOG/r /dev/stdin' CHANGELOG.md
+
+# requires python dependencies, thus to be running in venv
+validate:
+    uv run pytest