diff --git a/R/validate_inputs.R b/R/validate_inputs.R
index c146dc04c6..4fa8645a44 100644
--- a/R/validate_inputs.R
+++ b/R/validate_inputs.R
@@ -58,12 +58,16 @@
 #'   # set up input validation
 #'   iv <- InputValidator$new()
 #'   iv$add_rule("letter", sv_in_set(LETTERS, "choose a capital letter"))
-#'   iv$add_rule("number", ~ if (as.integer(.) %% 2L == 1L) "choose an even number")
+#'   iv$add_rule("number", function(x) {
+#'     if (as.integer(x) %% 2L == 1L) "choose an even number"
+#'   })
 #'   iv$enable()
 #'   # more input validation
 #'   iv_par <- InputValidator$new()
 #'   iv_par$add_rule("color", sv_required(message = "choose a color"))
-#'   iv_par$add_rule("color", ~ if (length(.) > 1L) "choose only one color")
+#'   iv_par$add_rule("color", function(x) {
+#'     if (length(x) > 1L) "choose only one color"
+#'   })
 #'   iv_par$add_rule(
 #'     "size",
 #'     sv_between(
@@ -87,7 +91,7 @@
 #'       ))
 #'     )
 #'
-#'     plot(eruptions ~ waiting, faithful,
+#'     plot(faithful$eruptions ~ faithful$waiting,
 #'       las = 1, pch = 16,
 #'       col = input[["color"]], cex = input[["size"]]
 #'     )
diff --git a/man/validate_inputs.Rd b/man/validate_inputs.Rd
index 50ae876d0e..caf9bb4be8 100644
--- a/man/validate_inputs.Rd
+++ b/man/validate_inputs.Rd
@@ -66,12 +66,16 @@ server <- function(input, output) {
   # set up input validation
   iv <- InputValidator$new()
   iv$add_rule("letter", sv_in_set(LETTERS, "choose a capital letter"))
-  iv$add_rule("number", ~ if (as.integer(.) \%\% 2L == 1L) "choose an even number")
+  iv$add_rule("number", function(x) {
+    if (as.integer(x) \%\% 2L == 1L) "choose an even number"
+  })
   iv$enable()
   # more input validation
   iv_par <- InputValidator$new()
   iv_par$add_rule("color", sv_required(message = "choose a color"))
-  iv_par$add_rule("color", ~ if (length(.) > 1L) "choose only one color")
+  iv_par$add_rule("color", function(x) {
+    if (length(x) > 1L) "choose only one color"
+  })
   iv_par$add_rule(
     "size",
     sv_between(
@@ -95,7 +99,7 @@ server <- function(input, output) {
       ))
     )
 
-    plot(eruptions ~ waiting, faithful,
+    plot(faithful$eruptions ~ faithful$waiting,
       las = 1, pch = 16,
       col = input[["color"]], cex = input[["size"]]
     )
diff --git a/tests/testthat/setup-options.R b/tests/testthat/setup-options.R
new file mode 100644
index 0000000000..78be1f9b5f
--- /dev/null
+++ b/tests/testthat/setup-options.R
@@ -0,0 +1,20 @@
+# `opts_partial_match_old` is left for exclusions due to partial matching in dependent packages (i.e. not fixable here)
+# it might happen that it is not used right now, but it is left for possible future use
+# use with: `withr::with_options(opts_partial_match_old, { ... })` inside the test
+opts_partial_match_old <- list(
+  warnPartialMatchDollar = getOption("warnPartialMatchDollar"),
+  warnPartialMatchArgs = getOption("warnPartialMatchArgs"),
+  warnPartialMatchAttr = getOption("warnPartialMatchAttr")
+)
+opts_partial_match_new <- list(
+  warnPartialMatchDollar = TRUE,
+  warnPartialMatchArgs = TRUE,
+  warnPartialMatchAttr = TRUE
+)
+
+if (isFALSE(getFromNamespace("on_cran", "testthat")()) && requireNamespace("withr", quietly = TRUE)) {
+  withr::local_options(
+    opts_partial_match_new,
+    .local_envir = testthat::teardown_env()
+  )
+}