diff --git a/Compiler/src/Launcher.java b/Compiler/src/Launcher.java
index e3b7062..3e452f1 100644
--- a/Compiler/src/Launcher.java
+++ b/Compiler/src/Launcher.java
@@ -29,8 +29,8 @@ public static void main(String... args) {
             System.exit(0);
         }
 
-        availableCompilers.put("Java", new JavaRunner());
-        availableCompilers.put("Javascript", new JavascriptRunner());
+        availableCompilers.put("java", new JavaRunner());
+        availableCompilers.put("javascript", new JavascriptRunner());
 
         File root = new File(FileSystems.getDefault().getPath("../").toAbsolutePath().toString());
 
@@ -45,8 +45,8 @@ public static void main(String... args) {
         }
 
         if(challenge != null) {
-            String wantedCompiler = args.length < 3 ? "Java" : args[2];
-            Runner runner = availableCompilers.getOrDefault(wantedCompiler, availableCompilers.get("Java"));
+            String wantedCompiler = args.length < 3 ? "java" : args[2];
+            Runner runner = availableCompilers.getOrDefault(wantedCompiler.toLowerCase(), availableCompilers.get("java"));
 
             CodeChecker codeChecker = runner.getCodeChecker(root, args[1]);
 
diff --git a/Testing/Tests/Challenge_Four.json b/Testing/Tests/Challenge_Four.json
index 173d2ef..bb0e99c 100644
--- a/Testing/Tests/Challenge_Four.json
+++ b/Testing/Tests/Challenge_Four.json
@@ -22,5 +22,8 @@
       "expectedReturn": "grebmoolB"
     }
   ],
-  "initialCode": "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn \"reversed string\";\n\t}\n}"
+  "initialCode" : {
+    "java" : "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn \"reversedstring\";\n\t}\n}",
+    "javascript" : "function program(args) {\n\treturn \"reversedstring\";\n}"
+  }
 }
\ No newline at end of file
diff --git a/Testing/Tests/Challenge_One.json b/Testing/Tests/Challenge_One.json
index e346d1d..6c4932a 100644
--- a/Testing/Tests/Challenge_One.json
+++ b/Testing/Tests/Challenge_One.json
@@ -18,5 +18,8 @@
       "expectedReturn": 16
     }
   ],
-  "initialCode": "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn -1;\n\t}\n}"
+  "initialCode" : {
+    "java" : "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn -1;\n\t}\n}",
+    "javascript" : "function program(args) {\n\treturn -1;\n}"
+  }
 } 
\ No newline at end of file
diff --git a/Testing/Tests/Challenge_Three.json b/Testing/Tests/Challenge_Three.json
index dff7926..d79c815 100644
--- a/Testing/Tests/Challenge_Three.json
+++ b/Testing/Tests/Challenge_Three.json
@@ -22,5 +22,8 @@
       "expectedReturn": 0
     }
   ],
-  "initialCode": "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn -1;\n\t}\n}"
+  "initialCode" : {
+    "java" : "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn -1;\n\t}\n}",
+    "javascript" : "function program(args) {\n\treturn -1;\n}"
+  }
 }
\ No newline at end of file
diff --git a/Testing/Tests/Challenge_Two.json b/Testing/Tests/Challenge_Two.json
index 13029e3..5120a9d 100644
--- a/Testing/Tests/Challenge_Two.json
+++ b/Testing/Tests/Challenge_Two.json
@@ -18,5 +18,8 @@
       "expectedReturn": 2
     }
   ],
-  "initialCode": "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn -1;\n\t}\n}"
+  "initialCode" : {
+    "java" : "public class Program {\n\tpublic Object run(String[] args) {\n\t\treturn -1;\n\t}\n}",
+    "javascript" : "function program(args) {\n\treturn -1;\n}"
+  }
 }
\ No newline at end of file