diff --git a/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C b/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
index ff91e32e15..e21ca9b857 100644
--- a/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
+++ b/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
@@ -193,12 +193,9 @@ void writeRays
     }
     str.flush();
 
-    DynamicList<string> cmd(3);
-    cmd.append("objToVTK");
-    cmd.append(fName);
-    cmd.append(fName.lessExt() + ".vtk");
-
     Pout<< "cmd: objToVTK " << fName.c_str() << endl;
+
+    stringList cmd{"objToVTK", fName, fName.lessExt().ext("vtk")};
     Foam::system(cmd);
 }
 
diff --git a/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCode.C b/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCode.C
index 6d969d61f9..291d1d05f5 100644
--- a/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCode.C
+++ b/src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCode.C
@@ -494,11 +494,7 @@ bool Foam::dynamicCode::copyOrCreateFiles(const bool verbose) const
 
 bool Foam::dynamicCode::wmakeLibso() const
 {
-    DynamicList<string> cmd(4);
-    cmd.append("wmake");
-    cmd.append("-s");
-    cmd.append("libso");
-    cmd.append(this->codePath());
+    stringList cmd{"wmake", "-s", "libso", this->codePath()};
 
     // NOTE: could also resolve wmake command explicitly
     //   cmd[0] = stringOps::expand("$WM_PROJECT_DIR/wmake/wmake");
diff --git a/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C b/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C
index b522df0e56..4480ea67dd 100644
--- a/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C
+++ b/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C
@@ -64,12 +64,9 @@ void Foam::faceShading::writeRays
     }
     str.flush();
 
-    DynamicList<string> cmd(3);
-    cmd.append("objToVTK");
-    cmd.append(fName);
-    cmd.append(fName.lessExt() + ".vtk");
-
     Pout<< "cmd: objToVTK " << fName.c_str() << endl;
+
+    stringList cmd{"objToVTK", fName, fName.lessExt().ext("vtk")};
     Foam::system(cmd);
 }