diff --git a/regtest/basic/rt80/COLVAR.reference b/regtest/basic/rt80/COLVAR.reference
new file mode 100644
index 0000000000000000000000000000000000000000..2de1d2b766d71b1016d2deaa29952e1cabeba444
--- /dev/null
+++ b/regtest/basic/rt80/COLVAR.reference
@@ -0,0 +1,8 @@
+#! FIELDS time mu1 phi md.bias
+#! SET min_phi -pi
+#! SET max_phi pi
+ 0.000000  1.163  0.497 -0.000
+ 0.050000  1.131  0.444 -0.000
+ 0.100000  1.098  0.398  0.480
+ 0.150000  1.080  0.351  0.934
+ 0.200000  1.087  0.314  1.403
diff --git a/regtest/basic/rt80/HILLS.0.reference b/regtest/basic/rt80/HILLS.0.reference
new file mode 100644
index 0000000000000000000000000000000000000000..e78f843c321f7d72e3be25cd07559dda124e8602
--- /dev/null
+++ b/regtest/basic/rt80/HILLS.0.reference
@@ -0,0 +1,6 @@
+#! FIELDS time mu1 sigma_mu1 height biasf
+#! SET multivariate false
+      0.050000      1.130546      0.100000      0.500000      1.000000
+      0.100000      1.097928      0.100000      0.501269      1.000000
+      0.150000      1.080244      0.100000      0.500010      1.000000
+      0.200000      1.086855      0.100000      0.490273      1.000000
diff --git a/regtest/basic/rt80/HILLS.1.reference b/regtest/basic/rt80/HILLS.1.reference
new file mode 100644
index 0000000000000000000000000000000000000000..e67d6ebb44cc23a2e1fb8fed14c09927f7157872
--- /dev/null
+++ b/regtest/basic/rt80/HILLS.1.reference
@@ -0,0 +1,8 @@
+#! FIELDS time phi sigma_phi height biasf
+#! SET multivariate false
+#! SET min_phi -pi
+#! SET max_phi pi
+      0.050000      0.443934      0.200000      0.500000      1.000000
+      0.100000      0.397591      0.200000      0.498731      1.000000
+      0.150000      0.350972      0.200000      0.499990      1.000000
+      0.200000      0.314416      0.200000      0.509727      1.000000
diff --git a/regtest/basic/rt80/Makefile b/regtest/basic/rt80/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..3703b27cea227aa053fb6d1d73f861e4384dbcee
--- /dev/null
+++ b/regtest/basic/rt80/Makefile
@@ -0,0 +1 @@
+include ../../scripts/test.make
diff --git a/regtest/basic/rt80/config b/regtest/basic/rt80/config
new file mode 100644
index 0000000000000000000000000000000000000000..c84525b6501a6a90eb262fa4b1199789012383fd
--- /dev/null
+++ b/regtest/basic/rt80/config
@@ -0,0 +1,5 @@
+type=driver
+# this is to test a different name
+arg="--plumed plumed.dat --trajectory-stride 10 --timestep 0.005 --ixyz trajectory.xyz --dump-forces forces --dump-forces-fmt=%10.6f
+  --box 5.0388,5.0388,5.0388"
+extra_files="../../trajectories/trajectory.xyz"
diff --git a/regtest/basic/rt80/forces.reference b/regtest/basic/rt80/forces.reference
new file mode 100644
index 0000000000000000000000000000000000000000..e0dd2a7b4b14e0e9337b760d8dfe3e74d06e34bc
--- /dev/null
+++ b/regtest/basic/rt80/forces.reference
@@ -0,0 +1,550 @@
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+X   0.000000   0.000000   0.000000
+X   0.000000   0.000000   0.000000
+108
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+X   1.423238  -1.133748  -0.786678
+X   0.000000   0.000000   0.000000
+X   0.422760  -0.062917   0.234809
+X   0.000000   0.000000   0.000000
+X  -0.416475   0.477893  -0.068381
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+X   0.000000   0.000000   0.000000
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+X   0.000000   0.000000   0.000000
diff --git a/regtest/basic/rt80/plumed.dat b/regtest/basic/rt80/plumed.dat
new file mode 100644
index 0000000000000000000000000000000000000000..a056bbb94fd3fe6f7010f1085cc0558ca7a71d6f
--- /dev/null
+++ b/regtest/basic/rt80/plumed.dat
@@ -0,0 +1,13 @@
+mu1: DISTANCE ATOMS=1,10
+phi: TORSION ATOMS=1,3,5,10
+
+PBMETAD ARG=mu1,phi SIGMA=0.1,0.2 HEIGHT=1.0 PACE=10 LABEL=md FMT=%14.6f FILE=HILLS.0,HILLS.1 TEMP=300
+
+PRINT ...
+  STRIDE=1
+  ARG=mu1,phi,md.bias 
+  FILE=COLVAR FMT=%6.3f
+... PRINT
+
+ENDPLUMED
+