diff --git a/src/senaite/ast/browser/results.py b/src/senaite/ast/browser/results.py
index 493c1d6..551fc72 100644
--- a/src/senaite/ast/browser/results.py
+++ b/src/senaite/ast/browser/results.py
@@ -65,6 +65,9 @@ def available(self):
 
         return False
 
+    def is_collapsed(self):
+        return False
+
 
 class ManageResultsView(AnalysesView):
     """Listing view for AST results entry