diff --git a/runners/katacoda/index.ts b/runners/katacoda/index.ts
index 0ef680ca..6ed86299 100644
--- a/runners/katacoda/index.ts
+++ b/runners/katacoda/index.ts
@@ -140,15 +140,16 @@ export class Katacoda extends Runner {
 
     runBuildJava(step: Step, command: Command): RunResult{
         
-        let cdCommand = this.changeCurrentDir(path.join("/root", "devonfw", "workspaces", "main", command.parameters[0]));;
+        let cdCommand = this.changeCurrentDir(path.join("/root", "devonfw", "workspaces", "main", command.parameters[0]));
 
-        let skipTestDescr = "";
-        let skipTest = "";
-        
-        if(command.parameters[1] == true){
-            skipTest = '-Dmaven.test.skip=' + command.parameters[1];
-            skipTestDescr = "We do not need to execute the test cases, so we can skip them by using the option '-Dmaven.test.skip=true'."
+        let skipTest = "-Dmaven.test.skip=true";
+        let skipTestDescr = "We do not need to execute the test cases, so we can skip them by using the option '-Dmaven.test.skip=true'.";  
+
+        if(command.parameters.length == 2 && command.parameters[1] == true){
+            skipTest = "";
+            skipTestDescr = "";    
         }
+    
         this.steps.push({
             "title": "Build the java project",
             "text": "step" + this.stepsCount + ".md"