diff --git a/tests/venv/binder-dir/binder/postBuild b/tests/venv/binder-dir/binder/postBuild
index 28b840f0f..0dd59128a 100755
--- a/tests/venv/binder-dir/binder/postBuild
+++ b/tests/venv/binder-dir/binder/postBuild
@@ -1,2 +1,2 @@
 #!/bin/bash
-jupyter nbextension enable --py --sys-prefix ipyleaflet
+jupyter nbclassic-nbextension enable --py --sys-prefix ipyleaflet