diff --git a/regtest/basic/rt-pesmd/Makefile b/regtest/basic/rt-pesmd/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..3703b27cea227aa053fb6d1d73f861e4384dbcee
--- /dev/null
+++ b/regtest/basic/rt-pesmd/Makefile
@@ -0,0 +1 @@
+include ../../scripts/test.make
diff --git a/regtest/basic/rt-pesmd/colv.reference b/regtest/basic/rt-pesmd/colv.reference
new file mode 100644
index 0000000000000000000000000000000000000000..72a923f4e5431272ba5f63ca5541653849c36dfc
--- /dev/null
+++ b/regtest/basic/rt-pesmd/colv.reference
@@ -0,0 +1,52 @@
+#! FIELDS time d1.x rr.bias rr.force2
+ 0.000000   0.1000   0.0100   0.0400
+ 0.005000   0.0993   0.0099   0.0394
+ 0.010000   0.0989   0.0098   0.0391
+ 0.015000   0.0984   0.0097   0.0387
+ 0.020000   0.0986   0.0097   0.0389
+ 0.025000   0.0985   0.0097   0.0388
+ 0.030000   0.0985   0.0097   0.0388
+ 0.035000   0.0981   0.0096   0.0385
+ 0.040000   0.0980   0.0096   0.0384
+ 0.045000   0.0976   0.0095   0.0381
+ 0.050000   0.0965   0.0093   0.0373
+ 0.055000   0.0951   0.0091   0.0362
+ 0.060000   0.0938   0.0088   0.0352
+ 0.065000   0.0916   0.0084   0.0336
+ 0.070000   0.0894   0.0080   0.0320
+ 0.075000   0.0882   0.0078   0.0311
+ 0.080000   0.0877   0.0077   0.0308
+ 0.085000   0.0878   0.0077   0.0308
+ 0.090000   0.0874   0.0076   0.0306
+ 0.095000   0.0868   0.0075   0.0301
+ 0.100000   0.0860   0.0074   0.0296
+ 0.105000   0.0856   0.0073   0.0293
+ 0.110000   0.0847   0.0072   0.0287
+ 0.115000   0.0841   0.0071   0.0283
+ 0.120000   0.0837   0.0070   0.0280
+ 0.125000   0.0828   0.0069   0.0274
+ 0.130000   0.0817   0.0067   0.0267
+ 0.135000   0.0801   0.0064   0.0256
+ 0.140000   0.0777   0.0060   0.0242
+ 0.145000   0.0764   0.0058   0.0233
+ 0.150000   0.0755   0.0057   0.0228
+ 0.155000   0.0743   0.0055   0.0221
+ 0.160000   0.0727   0.0053   0.0212
+ 0.165000   0.0723   0.0052   0.0209
+ 0.170000   0.0717   0.0051   0.0206
+ 0.175000   0.0713   0.0051   0.0204
+ 0.180000   0.0709   0.0050   0.0201
+ 0.185000   0.0713   0.0051   0.0203
+ 0.190000   0.0718   0.0052   0.0206
+ 0.195000   0.0717   0.0051   0.0206
+ 0.200000   0.0719   0.0052   0.0207
+ 0.205000   0.0722   0.0052   0.0209
+ 0.210000   0.0724   0.0052   0.0210
+ 0.215000   0.0726   0.0053   0.0211
+ 0.220000   0.0727   0.0053   0.0211
+ 0.225000   0.0730   0.0053   0.0213
+ 0.230000   0.0738   0.0054   0.0218
+ 0.235000   0.0747   0.0056   0.0223
+ 0.240000   0.0754   0.0057   0.0227
+ 0.245000   0.0767   0.0059   0.0236
+ 0.250000   0.0768   0.0059   0.0236
diff --git a/regtest/basic/rt-pesmd/config b/regtest/basic/rt-pesmd/config
new file mode 100644
index 0000000000000000000000000000000000000000..f65c8c59ba5f92e99416b6591eea47fb66fa7ec6
--- /dev/null
+++ b/regtest/basic/rt-pesmd/config
@@ -0,0 +1,2 @@
+type=plumed
+arg="pesmd input.dat" 
diff --git a/regtest/basic/rt-pesmd/input.dat b/regtest/basic/rt-pesmd/input.dat
new file mode 100644
index 0000000000000000000000000000000000000000..2a8df08091964057e0a3899c698dad29b59fc199
--- /dev/null
+++ b/regtest/basic/rt-pesmd/input.dat
@@ -0,0 +1,7 @@
+temperature 0.1
+friction 0.1
+tstep 0.005
+dimension 1
+nstep 50
+ipos 0.1
+periodic false
diff --git a/regtest/basic/rt-pesmd/plumed.dat b/regtest/basic/rt-pesmd/plumed.dat
new file mode 100644
index 0000000000000000000000000000000000000000..da2d0d818199f54ea4c6da925e77c14cc16b80b6
--- /dev/null
+++ b/regtest/basic/rt-pesmd/plumed.dat
@@ -0,0 +1,3 @@
+d1: DISTANCE ATOMS=1,2 COMPONENTS
+rr: RESTRAINT ARG=d1.x AT=0.0 KAPPA=2 
+PRINT ARG=d1.x,rr.* FILE=colv FMT=%8.4f