diff --git a/tests/testthat/helpers/expectors.R b/tests/testthat/helpers/expectors.R
new file mode 100644
index 000000000..2b70b3302
--- /dev/null
+++ b/tests/testthat/helpers/expectors.R
@@ -0,0 +1,27 @@
+# A customized version of vdiffr::expect_doppelganger() that is needed because
+# in 'testthat' versions >= 3.3.0, testthat::expect_snapshot_file() (upon which
+# vdiffr::expect_doppelganger() builds) errors if the snapshot file name has
+# already been used.
+expect_doppelganger_cust <- function(title,
+                                     fig,
+                                     test_filename = "methods_vsel",
+                                     ...) {
+  snap_nm_old <- testthat::test_path(
+    "_snaps", test_filename, paste0(tolower(gsub("\\.|_", "-", title)), ".svg")
+  )
+  if (packageVersion("testthat") >= "3.3.0" && file.exists(snap_nm_old)) {
+    variant_tmp <- paste0("tmp_doppelganger__",
+                          format(Sys.time(), format = "%Y-%m-%d_%H-%M-%S"))
+    vdiffr::expect_doppelganger(title, fig, variant = variant_tmp, ...)
+    snap_nm_new <- sub("_snaps", file.path("_snaps", variant_tmp), snap_nm_old)
+    expect_true(compare_file_text(old = snap_nm_old,
+                                  new = snap_nm_new),
+                info = title)
+    file.remove(snap_nm_new)
+    file.remove(testthat::test_path("_snaps", variant_tmp, test_filename))
+    file.remove(testthat::test_path("_snaps", variant_tmp))
+  } else {
+    vdiffr::expect_doppelganger(title = title, fig = fig, ...)
+  }
+  return(invisible(TRUE))
+}
diff --git a/tests/testthat/helpers/testers.R b/tests/testthat/helpers/testers.R
index d2122c066..94592b1e7 100644
--- a/tests/testthat/helpers/testers.R
+++ b/tests/testthat/helpers/testers.R
@@ -2960,7 +2960,7 @@ plot_vsel_tester <- function(
   expect_identical(attr(plot_vsel, "projpred_ranking_abbreviated"),
                    attr_abbv_expected, info = info_str)
   if (run_snaps) {
-    vdiffr::expect_doppelganger(info_str, plot_vsel)
+    expect_doppelganger_cust(info_str, plot_vsel)
   }
 
   return(invisible(TRUE))
diff --git a/tests/testthat/setup.R b/tests/testthat/setup.R
index a7c0fab94..7e32b2281 100755
--- a/tests/testthat/setup.R
+++ b/tests/testthat/setup.R
@@ -164,6 +164,7 @@ source(testthat::test_path("helpers", "formul_handlers.R"), local = TRUE)
 source(testthat::test_path("helpers", "predictor_handlers.R"), local = TRUE)
 source(testthat::test_path("helpers", "dummies.R"), local = TRUE)
 source(testthat::test_path("helpers", "creators.R"), local = TRUE)
+source(testthat::test_path("helpers", "expectors.R"), local = TRUE)
 
 # Note: The following `mod_nms` refer to *generalized* (linear/additive,
 # multilevel) models. This is due to history (when these tests were written,
diff --git a/tests/testthat/test_methods_vsel.R b/tests/testthat/test_methods_vsel.R
index 7921dba80..a7f12f14c 100644
--- a/tests/testthat/test_methods_vsel.R
+++ b/tests/testthat/test_methods_vsel.R
@@ -752,7 +752,7 @@ test_that("`x` of class `cv_proportions` works", {
   for (tstsetup in names(plotprs)) {
     expect_s3_class(plotprs[[tstsetup]], c("gg", "ggplot"))
     if (run_snaps) {
-      vdiffr::expect_doppelganger(tstsetup, plotprs[[tstsetup]])
+      expect_doppelganger_cust(tstsetup, plotprs[[tstsetup]])
     }
   }
 })
@@ -768,7 +768,7 @@ test_that("plot.ranking() is a shortcut", {
     ))
     expect_s3_class(plotpr_from_rk, c("gg", "ggplot"))
     if (run_snaps) {
-      vdiffr::expect_doppelganger(tstsetup, plotpr_from_rk)
+      expect_doppelganger_cust(tstsetup, plotpr_from_rk)
     }
   }
 })