diff --git a/internal/templates/template_test.go b/internal/templates/template_test.go
index 1dd6037..673b2db 100644
--- a/internal/templates/template_test.go
+++ b/internal/templates/template_test.go
@@ -32,10 +32,7 @@ func templateFuncMap() template.FuncMap {
 			if start >= len(s) {
 				return ""
 			}
-			end := start + length
-			if end > len(s) {
-				end = len(s)
-			}
+			end := min(start+length, len(s))
 			return s[start:end]
 		},
 		"upper": strings.ToUpper,