diff --git a/tests/visual_tests/collapse_rows_html.Rmd b/tests/visual_tests/collapse_rows_html.Rmd
index f9546c3..9722d3d 100644
--- a/tests/visual_tests/collapse_rows_html.Rmd
+++ b/tests/visual_tests/collapse_rows_html.Rmd
@@ -12,5 +12,6 @@
                  C4 = sample(c(0,1), 15, replace = TRUE))
 kable(collapse_rows_dt, "html", align = "c") %>%
   kable_styling() %>%
+  column_spec(1, bold=T) %>%
   collapse_rows(1:2)
 ```