diff --git a/.github/workflows/plugin_test.yaml b/.github/workflows/plugin_test.yaml
index 6b1b2e459..26a532c19 100644
--- a/.github/workflows/plugin_test.yaml
+++ b/.github/workflows/plugin_test.yaml
@@ -22,7 +22,7 @@ jobs:
         include:
 
           - plugin: pynxtools-ellips
-            branch: main
+            branch: adjust_lamp_type_for_new_nexus_def2
             tests_to_run: tests/.
           - plugin: pynxtools-raman
             branch: main