diff --git a/tests/testthat/test-theme.R b/tests/testthat/test-theme.R
index b98a5562..3d45650c 100644
--- a/tests/testthat/test-theme.R
+++ b/tests/testthat/test-theme.R
@@ -6,38 +6,78 @@ skip_if_not_installed("withr")
 # We need to install the package in a temporary library when we are in dev mode
 install_dev_package()
 
+theme_file <- function(...) {
+  test_path("theme", ...)
+}
+
+resource_dir <- function(input) {
+  theme_file(
+    paste0(fs::path_ext_remove(basename(input)), "_files")
+  )
+}
+
+local_render_theme_file <- function(input, env = parent.frame()) {
+  skip_if_not_installed("withr")
+  withr::defer(
+    {
+      # clean up output resource directory
+      out_dir <- resource_dir(input)
+      if (fs::dir_exists(out_dir)) {
+        fs::dir_delete(out_dir)
+      }
+      # clean up internal .quarto directory
+      if (fs::dir_exists(".quarto")) {
+        fs::dir_delete(".quarto")
+      }
+    },
+    envir = env
+  )
+}
+
 test_that("render flextable", {
   skip_if_not_installed("bslib")
   skip_if_not_installed("flextable")
-  .render(test_path("theme/flextable.qmd"))
+  file <- theme_file("flextable.qmd")
+  local_render_theme_file(file)
+  .render(file)
 })
 
 test_that("render ggiraph", {
   skip_if_not_installed("bslib")
   skip_if_not_installed("ggiraph")
-  .render(test_path("theme/ggiraph.qmd"))
+  file <- theme_file("ggiraph.qmd")
+  local_render_theme_file(file)
+  .render(file)
 })
 
 test_that("render ggplot2", {
   skip_if_not_installed("bslib")
   skip_if_not_installed("ggplot2")
-  .render(test_path("theme/ggplot2.qmd"))
+  file <- theme_file("ggplot2.qmd")
+  local_render_theme_file(file)
+  .render(test_path(file))
 })
 
 test_that("render gt", {
   skip_if_not_installed("bslib")
   skip_if_not_installed("gt")
-  .render(test_path("theme/gt.qmd"))
+  file <- theme_file("gt.qmd")
+  local_render_theme_file(file)
+  .render(file)
 })
 
 test_that("render plotly-r", {
   skip_if_not_installed("bslib")
   skip_if_not_installed("plotly")
-  .render(test_path("theme/plotly-r.qmd"))
+  file <- theme_file("plotly-r.qmd")
+  local_render_theme_file(file)
+  .render(file)
 })
 
 test_that("render thematic", {
   skip_if_not_installed("bslib")
   skip_if_not_installed("thematic")
-  .render(test_path("theme/thematic.qmd"))
+  file <- theme_file("thematic.qmd")
+  local_render_theme_file(file)
+  .render(file)
 })