diff --git a/regtest/basic/rt-molfile-3/plumed.dat b/regtest/basic/rt-molfile-3/plumed.dat
index 0a7ba6d22af7780c8a4ffa8704fd37647c57c22b..89075bcedf0470be9f75a2f032ce4fc4f0e705a1 100644
--- a/regtest/basic/rt-molfile-3/plumed.dat
+++ b/regtest/basic/rt-molfile-3/plumed.dat
@@ -1 +1 @@
-DUMPATOMS ATOMS=1 FILE=test.gro PRECISION=6
+DUMPATOMS ATOMS=1 FILE=test.gro PRECISION=5
diff --git a/regtest/basic/rt-molfile-3/test.gro.reference b/regtest/basic/rt-molfile-3/test.gro.reference
index 94f5425eb39072bbab35debbf734cd89cf190f1d..cec43ad59170835aec80c80b33c2ac7a3c6df369 100644
--- a/regtest/basic/rt-molfile-3/test.gro.reference
+++ b/regtest/basic/rt-molfile-3/test.gro.reference
@@ -1,4 +1,4 @@
 Made with PLUMED t=0.000000
 1
-    0         X    1   1.369000   3.074000   1.368000
-   4.178910    3.939910    3.412060    0.000000    0.000000    1.392970    0.000000   -1.392970    1.969960
+    0         X    1   1.36900   3.07400   1.36800
+   4.17891    3.93991    3.41206    0.00000    0.00000    1.39297    0.00000   -1.39297    1.96996