diff --git a/tests/visual_tests/longtable.Rmd b/tests/visual_tests/longtable.Rmd
index 2653dc1..4e6a064 100644
--- a/tests/visual_tests/longtable.Rmd
+++ b/tests/visual_tests/longtable.Rmd
@@ -16,7 +16,7 @@
 library(knitr)
 library(kableExtra)
 
-dt <- rbind(mtcars, mtcars) 
+dt <- rbind(mtcars[1:30,], mtcars) 
 
 # kable(dt, "latex", longtable = T, caption="test table") %>%
 #   add_header_above(c(" ", "a" = 6, "b" = 5)) %>%
