diff --git a/regtest/basic/rt67-mpi/COLVAR.reference b/regtest/basic/rt67-mpi/COLVAR.reference
index 7d00a355feca39f9bec7a530282a1b70349104d2..2f9cce0086b9293399fcf1e494ad3111e8f91a6b 100644
--- a/regtest/basic/rt67-mpi/COLVAR.reference
+++ b/regtest/basic/rt67-mpi/COLVAR.reference
@@ -14,13 +14,13 @@
  8.000000  -1.8429   1.3293   0.6692   0.5800   0.1025
  9.000000  -2.2424   2.6059   0.0000  -0.1025   0.1109
  10.000000  -1.1482   0.5350   1.8435   1.7326   0.1281
- 11.000000  -1.7580   2.0752   0.0012  -0.1269   0.1367
- 12.000000  -1.3186   3.0997   0.0000  -0.1367   0.1443
- 13.000000  -2.9911   2.8991   0.0000  -0.1443   0.1524
- 14.000000  -1.4112   0.0028   0.0285  -0.1239   0.1614
- 15.000000  -2.5995   2.6683   0.3230   0.1616   0.1714
- 16.000000  -1.4608   0.2622   0.9676   0.7962   0.1856
- 17.000000  -1.3791   1.1576   3.0484   2.8628   0.2090
- 18.000000  -1.6771   0.9078   1.5947   1.3857   0.2309
- 19.000000  -1.5241   1.2623   4.1823   3.9513   0.2607
- 20.000000  -1.1997   0.9529   3.1902   2.9295   0.2924
+ 11.000000  -1.7580   2.0752   0.0012  -0.1269   0.1368
+ 12.000000  -1.3186   3.0997   0.0000  -0.1368   0.1451
+ 13.000000  -2.9911   2.8991   0.0000  -0.1451   0.1534
+ 14.000000  -1.4112   0.0028   0.0285  -0.1250   0.1625
+ 15.000000  -2.5995   2.6683   0.3230   0.1606   0.1725
+ 16.000000  -1.4608   0.2622   0.9676   0.7951   0.1867
+ 17.000000  -1.3791   1.1576   3.0484   2.8617   0.2101
+ 18.000000  -1.6771   0.9078   1.5947   1.3846   0.2320
+ 19.000000  -1.5241   1.2623   4.1823   3.9503   0.2617
+ 20.000000  -1.1997   0.9529   3.1902   2.9285   0.2935
diff --git a/regtest/basic/rt67/COLVAR.reference b/regtest/basic/rt67/COLVAR.reference
index 7d00a355feca39f9bec7a530282a1b70349104d2..2f9cce0086b9293399fcf1e494ad3111e8f91a6b 100644
--- a/regtest/basic/rt67/COLVAR.reference
+++ b/regtest/basic/rt67/COLVAR.reference
@@ -14,13 +14,13 @@
  8.000000  -1.8429   1.3293   0.6692   0.5800   0.1025
  9.000000  -2.2424   2.6059   0.0000  -0.1025   0.1109
  10.000000  -1.1482   0.5350   1.8435   1.7326   0.1281
- 11.000000  -1.7580   2.0752   0.0012  -0.1269   0.1367
- 12.000000  -1.3186   3.0997   0.0000  -0.1367   0.1443
- 13.000000  -2.9911   2.8991   0.0000  -0.1443   0.1524
- 14.000000  -1.4112   0.0028   0.0285  -0.1239   0.1614
- 15.000000  -2.5995   2.6683   0.3230   0.1616   0.1714
- 16.000000  -1.4608   0.2622   0.9676   0.7962   0.1856
- 17.000000  -1.3791   1.1576   3.0484   2.8628   0.2090
- 18.000000  -1.6771   0.9078   1.5947   1.3857   0.2309
- 19.000000  -1.5241   1.2623   4.1823   3.9513   0.2607
- 20.000000  -1.1997   0.9529   3.1902   2.9295   0.2924
+ 11.000000  -1.7580   2.0752   0.0012  -0.1269   0.1368
+ 12.000000  -1.3186   3.0997   0.0000  -0.1368   0.1451
+ 13.000000  -2.9911   2.8991   0.0000  -0.1451   0.1534
+ 14.000000  -1.4112   0.0028   0.0285  -0.1250   0.1625
+ 15.000000  -2.5995   2.6683   0.3230   0.1606   0.1725
+ 16.000000  -1.4608   0.2622   0.9676   0.7951   0.1867
+ 17.000000  -1.3791   1.1576   3.0484   2.8617   0.2101
+ 18.000000  -1.6771   0.9078   1.5947   1.3846   0.2320
+ 19.000000  -1.5241   1.2623   4.1823   3.9503   0.2617
+ 20.000000  -1.1997   0.9529   3.1902   2.9285   0.2935