diff --git a/regtest/basic/rt60-cregex/plumed.dat b/regtest/basic/rt60-cregex/plumed.dat
index ffcad2a1faba9c83a6b09f2282c417ce3d86d0ac..cd1a2f89730eef7b881910f92897a0a7388bceb5 100644
--- a/regtest/basic/rt60-cregex/plumed.dat
+++ b/regtest/basic/rt60-cregex/plumed.dat
@@ -3,7 +3,7 @@ t2: TORSION ATOMS=7,9,15,17
 d1: DISTANCE ATOMS=7,17 COMPONENTS 
 d1ox: TORSION ATOMS=7,9,15,17
 PRINT ARG=(d1\.[xy]),(pino) STRIDE=100 FILE=colvar FMT=%8.4f
-PRINT ARG=(d1\.[xy]),(t[0-9]) STRIDE=100 FILE=colvar1 FMT=%8.4f
-PRINT ARG=(d1\.[xy]|t[0-9]) STRIDE=100 FILE=colvar2 FMT=%8.4f
-PRINT ARG=(d1\.[xy]),(d1.[xy]) STRIDE=100 FILE=colvar3 FMT=%8.4f
-PRINT ARG=(d1.[xy]) STRIDE=100 FILE=colvar4 FMT=%8.4f
+#PRINT ARG=(d1\.[xy]),(t[0-9]) STRIDE=100 FILE=colvar1 FMT=%8.4f
+#PRINT ARG=(d1\.[xy]|t[0-9]) STRIDE=100 FILE=colvar2 FMT=%8.4f
+#PRINT ARG=(d1\.[xy]),(d1.[xy]) STRIDE=100 FILE=colvar3 FMT=%8.4f
+#PRINT ARG=(d1.[xy]) STRIDE=100 FILE=colvar4 FMT=%8.4f
diff --git a/regtest/basic/rt61-cregex/plumed.dat b/regtest/basic/rt61-cregex/plumed.dat
index 568f717014d658d06ab25ac4853181441e63113c..a64354161c10136e66e0bdc88412bec0ed109d3e 100644
--- a/regtest/basic/rt61-cregex/plumed.dat
+++ b/regtest/basic/rt61-cregex/plumed.dat
@@ -1,7 +1,7 @@
 t1: TORSION ATOMS=5,7,9,15 
 t2: TORSION ATOMS=7,9,15,17
 d1: DISTANCE ATOMS=7,17 COMPONENTS 
-#PRINT ARG=(d1.[xy]),(pino) STRIDE=100 FILE=colvar FMT=%8.4f
-PRINT ARG=(d1.[xy]),(t[0-9]) STRIDE=100 FILE=colvar FMT=%8.4f
-#PRINT ARG=(d1.[xy]),(d1.[xy]) STRIDE=100 FILE=colvar FMT=%8.4f
+#PRINT ARG=(d1\.[xy]),(pino) STRIDE=100 FILE=colvar FMT=%8.4f
+PRINT ARG=(d1\.[xy]),(t[0-9]) STRIDE=100 FILE=colvar FMT=%8.4f
+#PRINT ARG=(d1\.[xy]),(d1.[xy]) STRIDE=100 FILE=colvar FMT=%8.4f
 #PRINT ARG=d1.x,d1.y STRIDE=100 FILE=colvar FMT=%8.4f
diff --git a/regtest/basic/rt62-cregex/plumed.dat b/regtest/basic/rt62-cregex/plumed.dat
index 5c24209f5bc801ae4d337a22f05f492b09541c4e..34b8250c82e00cc32fa18e1c194ab02d6c04cb6c 100644
--- a/regtest/basic/rt62-cregex/plumed.dat
+++ b/regtest/basic/rt62-cregex/plumed.dat
@@ -3,5 +3,5 @@ t2: TORSION ATOMS=7,9,15,17
 d1: DISTANCE ATOMS=7,17 COMPONENTS 
 #PRINT ARG=(d1.[xy]),(pino) STRIDE=100 FILE=colvar FMT=%8.4f
 #PRINT ARG=(d1.[xy]),(t[0-9]) STRIDE=100 FILE=colvar FMT=%8.4f
-PRINT ARG=(d1.[xy]),(d1.[xy]) STRIDE=100 FILE=colvar FMT=%8.4f
+PRINT ARG=(d1\.[xy]),(d1\.[xy]) STRIDE=100 FILE=colvar FMT=%8.4f
 #PRINT ARG=d1.x,d1.y STRIDE=100 FILE=colvar FMT=%8.4f