diff --git a/SimpleCodeTester-Lib/src/main/java/edu/kit/informatik/Terminal.java b/SimpleCodeTester-Lib/src/main/java/edu/kit/informatik/Terminal.java
index 75eed8a..f6f5631 100644
--- a/SimpleCodeTester-Lib/src/main/java/edu/kit/informatik/Terminal.java
+++ b/SimpleCodeTester-Lib/src/main/java/edu/kit/informatik/Terminal.java
@@ -3,6 +3,7 @@
 import static java.util.stream.Collectors.joining;
 import static java.util.stream.Collectors.toMap;
 
+import java.io.FileNotFoundException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -94,7 +95,7 @@ public static String[] readFile(final String path) {
     if (files.containsKey(path)) {
       return files.get(path).getContent().split("\\n");
     }
-    throw new IllegalArgumentException("File '" + path + "' not found! I know: " + files.keySet());
+    throw new FileNotFoundException("File '" + path + "' not found! I know: " + files.keySet());
   }
 
   public static boolean hasFile(String path) {