diff --git a/regtest/python/rt-protein/config b/regtest/python/rt-protein/config
index 57dff95f9f3629a7e1f75f1cac2d52021a23fade..fefa8770046dd59ac31e87c6164e5a169e2ea1e6 100644
--- a/regtest/python/rt-protein/config
+++ b/regtest/python/rt-protein/config
@@ -1,4 +1,5 @@
 plumed_needs=python
 # this is to test a different name
+type=python
 arg="./python-script.py"
 extra_files="../../trajectories/trajectory.xyz"