diff --git a/data/w.itp b/data/w.itp
new file mode 100644
index 0000000000000000000000000000000000000000..dbf1bf8a114226361cf97614d898c0febb221f87
--- /dev/null
+++ b/data/w.itp
@@ -0,0 +1,19 @@
+;;;;;; WATER (representing 4 H2O molecules)
+
+[ moleculetype ]
+; molname  	nrexcl
+  W 	    	1
+
+[ atoms ]
+;id 	type 	resnr 	residu 	atom 	cgnr 	charge
+ 1 	P4 	1 	W 	W 	1 	0 
+
+;;;;;; ANTIFREEZE (prevents freezing of water)
+
+[ moleculetype ]
+; molname 	 nrexcl
+  WF	   	 1
+
+[ atoms ]
+;id 	type 	resnr 	residu 	atom 	cgnr 	charge
+ 1 	BP4 	1 	WF	WF	1 	0
diff --git a/data/watermodels.dat b/data/watermodels.dat
new file mode 100644
index 0000000000000000000000000000000000000000..1c7b262df6da3ed477e6a11e5392ddaf924c3c9c
--- /dev/null
+++ b/data/watermodels.dat
@@ -0,0 +1,2 @@
+w    W      Standard MARTINI water
+pw   PW     Polarisable MARTINI water
diff --git a/test/__init__.py b/test/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391