diff --git a/src/specificClass.js b/src/specificClass.js
index 8366ddd..d51c963 100644
--- a/src/specificClass.js
+++ b/src/specificClass.js
@@ -613,7 +613,8 @@ function pushSample(measurement, type, value, unit) { // eslint-disable-line no-
 }
 
 /** Demo *********************************************************************/
-(async function demoStationWithPump() {
+// Only run the demo when this file is executed directly (not when required as a module)
+if (require.main === module) (async function demoStationWithPump() {
   const station = new PumpingStation(createPumpingStationConfig("PumpingStationDemo"));
   const pump = new RotatingMachine(createMachineConfig("Pump1"), createMachineStateConfig());