diff --git a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/Allrun b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/Allrun
index 412588ec4e..2c479d5b1d 100755
--- a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/Allrun
+++ b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/Allrun
@@ -9,17 +9,14 @@ liquidSpecies="H2O C3H8O none"
 
 runApplication blockMesh
 
-function setArg()
-{
-    [ $1 != "none" ] && echo -set $1 || echo -remove
-}
-
 for g in $gasSpecies
 do
-    foamDictionary -entry inertSpecie $(setArg $g) constant/thermophysicalProperties.gas
+    [ $g != "none" ] && setArg="-set $g" || setArg="-remove"
+    foamDictionary -entry inertSpecie $setArg constant/thermophysicalProperties.gas
     for l in $liquidSpecies
     do
-        foamDictionary -entry inertSpecie $(setArg $l) constant/thermophysicalProperties.liquid
+        [ $l != "none" ] && setArg="-set $l" || setArg="-remove"
+        foamDictionary -entry inertSpecie $setArg constant/thermophysicalProperties.liquid
         runApplication -s $g.gas_$l.liquid $(getApplication)
         mv postProcessing postProcessing_$g.gas_$l.liquid
     done
diff --git a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/Allrun b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/Allrun
index 9b2c10df49..0c903733e5 100755
--- a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/Allrun
+++ b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/Allrun
@@ -8,14 +8,10 @@ gasSpecies="air H2O none"
 
 runApplication blockMesh
 
-function setArg()
-{
-    [ $1 != "none" ] && echo -set $1 || echo -remove
-}
-
 for g in $gasSpecies
 do
-    foamDictionary -entry inertSpecie $(setArg $g) constant/thermophysicalProperties.gas
+    [ $g != "none" ] && setArg="-set $g" || setArg="-remove"
+    foamDictionary -entry inertSpecie $setArg constant/thermophysicalProperties.gas
     runApplication -s $g.gas $(getApplication)
     mv postProcessing postProcessing_$g.gas
 done