diff --git a/R/tm_g_association.R b/R/tm_g_association.R
index f402e2b58..6b7e35c38 100644
--- a/R/tm_g_association.R
+++ b/R/tm_g_association.R
@@ -222,6 +222,8 @@ srv_tm_g_association <- function(id,
                                  ggplot2_args) {
   with_reporter <- !missing(reporter) && inherits(reporter, "Reporter")
   with_filter <- !missing(filter_panel_api) && inherits(filter_panel_api, "FilterPanelAPI")
+  checkmate::assert_class(data, "reactive")
+  checkmate::assert_class(isolate(data()), "teal_data")
 
   moduleServer(id, function(input, output, session) {
     selector_list <- teal.transform::data_extract_multiple_srv(