diff --git a/tutorials/multiphase/interDyMFoam/ras/floatingObject/system/decomposeParDict b/tutorials/multiphase/interDyMFoam/ras/floatingObject/system/decomposeParDict
index 7c7ca43b9a..0548a40b12 100644
--- a/tutorials/multiphase/interDyMFoam/ras/floatingObject/system/decomposeParDict
+++ b/tutorials/multiphase/interDyMFoam/ras/floatingObject/system/decomposeParDict
@@ -15,9 +15,9 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-numberOfSubdomains 4;
+numberOfSubdomains 8;
 
-method          hierarchical;
+method          scotch;
 
 simpleCoeffs
 {