In the present study we made blind predictions of the octanol/water partition coefficient for the 22 molecules in fig. for the SAMPL7 challenge, wherein we treated the octanol-rich phase as pure 1-octanol and water-saturated 1-octanol. We used a combination of TIP4P water and TraPPE-UA 1-octanol which were shown by Chen and Siepmann to well reproduce the experimental mutual solubility. As compared to the experimental data provided at the close of the challenge, our predictions using pure 1-octanol had a RMSE of 1.08 and ranked 1/10 in the "Physical (MM)" category, while our predictions using water-saturated 1-octanol had a RMSE of 1.47 and ranked 6/10 in the Physical (MM) category. After the close of the challenge, we additionally repeated the calculations with TIP4P/2005 to look at the effect of the water model. With TIP4P/2005, for neat 1-octanol we obtained a RMSE of 0.97 and for water-saturated 1-octanol we obtained a RMSE of 1.20. Similar to the findings of the SAMPL6 challenge, we find that the predictions are sensitive to the choice of force fields . However, here we find that the effect of water in the octanol-rich phase is not negligible. Additionally, we find that the effect of inclusion of water is dependent on the chemical structure of the solute. As compared to the solute molecules in the SAMPL6 challenge (see fig. ), we expect hydrogen bonding to be more important with the SAMPL7 solute molecules. As demonstrated by Chen and Siepmann , as compared to pure 1-octanol, in water-saturated 1-octanol considerably more large hydrogen bond aggregates exist. Looking at the local solvent density around the solute molecules we were able to see the effect.