diff --git a/regtest/isdb/rt-cs2backbone/plumed.dat b/regtest/isdb/rt-cs2backbone/plumed.dat
index 8191a8b7bdfe4fb3b2a977fb29801c06f6afb68f..206b03b2b59296df7910e3aa87435543edcded62 100644
--- a/regtest/isdb/rt-cs2backbone/plumed.dat
+++ b/regtest/isdb/rt-cs2backbone/plumed.dat
@@ -14,6 +14,7 @@ RESTRAINT ARG=csa AT=0 KAPPA=0 SLOPE=1.0
 
 PRINT ARG=csa,(cs\.ca_.*),(cs\.cb_.*),(cs\.hn_.*),(cs\.nh_.*) STRIDE=1 FILE=colvar FMT=%8.4f
 PRINT ARG=ens.* STRIDE=1 FILE=ecolvar FMT=%8.4f
+PRINT ARG=st.sqdevsum,ste.corr FILE=stat STRIDE=1
 
 #csn: CS2BACKBONE ATOMS=1-2612 NRES=176 DATADIR=../data/ TEMPLATE=template.pdb NEIGH_FREQ=1 NOPBC CAMSHIFT NUMERICAL_DERIVATIVES 
 #DUMPDERIVATIVES ARG=csa,csn  FILE=derivatives1 FMT=%8.2f STRIDE=1
diff --git a/regtest/isdb/rt-cs2backbone/stat.reference b/regtest/isdb/rt-cs2backbone/stat.reference
new file mode 100644
index 0000000000000000000000000000000000000000..a71d7dfeae1218507c74514bfed93d4909d7fe56
--- /dev/null
+++ b/regtest/isdb/rt-cs2backbone/stat.reference
@@ -0,0 +1,2 @@
+#! FIELDS time st.sqdevsum ste.corr
+ 0.000000 2616.873080 0.998722