1 files changed, 1 insertions, 1 deletions
diff --git a/docs/teaching/exercises/tests/Test3d.java b/docs/teaching/exercises/tests/Test3d.java
index 4fe8a04ca..977c253a6 100755
--- a/docs/teaching/exercises/tests/Test3d.java
+++ b/docs/teaching/exercises/tests/Test3d.java
@@ -18,7 +18,7 @@ import junit.framework.*;
 import java.util.List;
 import java.util.Arrays;
 
-public class Test3d extends Test {
+public class Test3d extends CoreTest {
 
     public static void main(String[] args) {
         junit.textui.TestRunner.run(Test3d.class);