diff --git a/regtest/basic/rt73/Makefile b/regtest/basic/rt73/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..3703b27cea227aa053fb6d1d73f861e4384dbcee
--- /dev/null
+++ b/regtest/basic/rt73/Makefile
@@ -0,0 +1 @@
+include ../../scripts/test.make
diff --git a/regtest/basic/rt73/act.reference b/regtest/basic/rt73/act.reference
new file mode 100644
index 0000000000000000000000000000000000000000..28cbc219ca568a4e91c47ada35a15999a45a6ef9
--- /dev/null
+++ b/regtest/basic/rt73/act.reference
@@ -0,0 +1,4 @@
+activity at step 0: ++++
+activity at step 2: +-+-
+activity at step 3: -+-+
+activity at step 4: +-+-
diff --git a/regtest/basic/rt73/config b/regtest/basic/rt73/config
new file mode 100644
index 0000000000000000000000000000000000000000..2a581c3269bb30574d5ca900717746ca4956a116
--- /dev/null
+++ b/regtest/basic/rt73/config
@@ -0,0 +1,4 @@
+type=driver
+# this is to test a different name
+arg="--plumed plumed.dat --trajectory-stride 1 --timestep 0.005 --ixyz trajectory.xyz"
+extra_files="../../trajectories/trajectory.xyz"
diff --git a/regtest/basic/rt73/d1.reference b/regtest/basic/rt73/d1.reference
new file mode 100644
index 0000000000000000000000000000000000000000..fcf2138188c8db6449b590442ff008400ee6fbed
--- /dev/null
+++ b/regtest/basic/rt73/d1.reference
@@ -0,0 +1,4 @@
+#! FIELDS time d1
+ 0.000000 1.162646
+ 0.010000 1.097928
+ 0.020000 1.086855
diff --git a/regtest/basic/rt73/d2.reference b/regtest/basic/rt73/d2.reference
new file mode 100644
index 0000000000000000000000000000000000000000..ec6adfa2cfb316418a337dcbb1a3e141f6b996ce
--- /dev/null
+++ b/regtest/basic/rt73/d2.reference
@@ -0,0 +1,3 @@
+#! FIELDS time d2
+ 0.000000 2.655848
+ 0.015000 2.569344
diff --git a/regtest/basic/rt73/plumed.dat b/regtest/basic/rt73/plumed.dat
new file mode 100644
index 0000000000000000000000000000000000000000..96a5c2778cf95c20a5c3fab381959fa07534bc36
--- /dev/null
+++ b/regtest/basic/rt73/plumed.dat
@@ -0,0 +1,11 @@
+d1: DISTANCE ATOMS=1,10
+d2: DISTANCE ATOMS=2,11
+
+PRINT ARG=d1 FILE=d1 STRIDE=2
+PRINT ARG=d2 FILE=d2 STRIDE=3
+
+DEBUG logRequestedAtoms FILE=req
+DEBUG logActivity FILE=act
+
+ENDPLUMED
+
diff --git a/regtest/basic/rt73/req.reference b/regtest/basic/rt73/req.reference
new file mode 100644
index 0000000000000000000000000000000000000000..f8eb19a7d212a02af4de0559a9cce06d12d578cd
--- /dev/null
+++ b/regtest/basic/rt73/req.reference
@@ -0,0 +1,5 @@
+requested atoms at step 0:  0 1 9 10
+requested atoms at step 1: 
+requested atoms at step 2:  0 9
+requested atoms at step 3:  1 10
+requested atoms at step 4:  0 9