diff --git a/tutorials/incompressible/porousSimpleFoam/straightDuctImplicit/Allmesh b/tutorials/incompressible/porousSimpleFoam/straightDuctImplicit/Allmesh
index 9a95d04cbd..9578e3b12c 100755
--- a/tutorials/incompressible/porousSimpleFoam/straightDuctImplicit/Allmesh
+++ b/tutorials/incompressible/porousSimpleFoam/straightDuctImplicit/Allmesh
@@ -18,7 +18,7 @@ runApplication -s collapseFaces \
 
 runApplication checkMesh -allTopology -allGeometry -latestTime
 
-latestTime=`foamListTimes -latestTime`
+latestTime="$(foamListTimes -latestTime)"
 
 # Move the mesh into polyMesh
 rm -rf constant/polyMesh
diff --git a/tutorials/mesh/foamyHexMesh/mixerVessel/Allmesh b/tutorials/mesh/foamyHexMesh/mixerVessel/Allmesh
index d22a716634..336c8c084d 100755
--- a/tutorials/mesh/foamyHexMesh/mixerVessel/Allmesh
+++ b/tutorials/mesh/foamyHexMesh/mixerVessel/Allmesh
@@ -16,9 +16,6 @@ intersectSurfaces()
         surfaceBooleanFeatures "$@" intersection
 }
 
-# Set application name
-application=$(getApplication)
-
 # Run the surface preparation script
 ./constant/triSurface/surfaceProcess.sh > log.surfaceProcess 2>&1
 
diff --git a/tutorials/multiphase/interFoam/RAS/mixerVesselAMI/Allmesh b/tutorials/multiphase/interFoam/RAS/mixerVesselAMI/Allmesh
index 73bdcda6c5..b8bfd32e0e 100755
--- a/tutorials/multiphase/interFoam/RAS/mixerVesselAMI/Allmesh
+++ b/tutorials/multiphase/interFoam/RAS/mixerVesselAMI/Allmesh
@@ -4,9 +4,6 @@ cd ${0%/*} || exit 1    # Run from this directory
 # Source tutorial run functions
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
-# Set application name
-application=$(getApplication)
-
 # Meshing
 runApplication blockMesh
 runApplication surfaceFeatures
diff --git a/tutorials/multiphase/interFoam/RAS/waterChannel/Allmesh b/tutorials/multiphase/interFoam/RAS/waterChannel/Allmesh
index c941916ef1..97900ec6cd 100755
--- a/tutorials/multiphase/interFoam/RAS/waterChannel/Allmesh
+++ b/tutorials/multiphase/interFoam/RAS/waterChannel/Allmesh
@@ -4,8 +4,6 @@ cd ${0%/*} || exit 1    # run from this directory
 # Source tutorial run functions
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
-application=$(getApplication)
-
 runApplication blockMesh
 
 echo "Creating channel"
@@ -14,7 +12,7 @@ while [ "$i" -lt 3 ] ; do
     cp system/extrudeMeshDict.${i} system/extrudeMeshDict
     echo "Running extrudeMesh, instance" ${i}
     extrudeMesh > log.extrudeMesh.${i}
-    i=`expr $i + 1`
+    i=$((i + 1))
 done
 
 #------------------------------------------------------------------------------