diff --git a/vignettes/statistical_power.Rmd b/vignettes/statistical_power.Rmd
index 1aba1288..b433d18e 100644
--- a/vignettes/statistical_power.Rmd
+++ b/vignettes/statistical_power.Rmd
@@ -111,7 +111,7 @@ Given the simplicity of this example and the prevalence of Cohen's $d$, we will
 
 The first approach is the simplest. As previously hinted at, there is a vast literature on different effect size calculations for different applications. So, if you don't want to track down a specific one, or are unaware of options, you can simply pass the statistical test object to `effectsize()`, and either select the `type`, or leave it blank for "cohens_d", which is the default option. 
 
-```{r warning = FALSE}
+```{r eval = FALSE}
 effectsize(t, type = "cohens_d")
 ```