diff --git a/test/gromacs/cs2back/.gitignore b/test/gromacs/cs2back/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..b7805002cabfe65647007c0e8597143c28deedc2
--- /dev/null
+++ b/test/gromacs/cs2back/.gitignore
@@ -0,0 +1,9 @@
+*.edr
+*.trr
+*.xtc
+*.log
+*.cpt
+\#*
+bk*
+COLVAR*
+*.pdb