diff --git a/inst/apps/317-bslib-preset-shiny-dashboard/app.R b/inst/apps/317-bslib-preset-shiny-dashboard/app.R
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+++ b/inst/apps/317-bslib-preset-shiny-dashboard/app.R
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+library(shiny)
+library(bslib)
+library(htmltools)
+
+options(
+  sass.cache = FALSE,
+  shiny.autoreload = TRUE,
+  shiny.testmode = TRUE,
+  bslib.precompiled = FALSE
+)
+
+toggle_class_buttons <- HTML('
+<fieldset>
+<legend class="fs-5 border-bottom">Body Classes</legend>
+<div class="form-check form-switch">
+    <input
+      class="form-check-input body-class-toggle"
+      type="checkbox"
+      id="dashboard_toggle"
+      data-class="bslib-page-dashboard"
+      onchange="document.body.classList.toggle(this.dataset.class, this.checked)"
+    >
+    <label class="form-check-label" for="dashboard_toggle">Dashboard Class</label>
+</div>
+<div class="form-check form-switch">
+    <input
+      class="form-check-input body-class-toggle"
+      type="checkbox"
+      id="shadow_toggle"
+      data-class="bslib-card-box-shadow-none"
+      onchange="document.body.classList.toggle(this.dataset.class, this.checked)"
+    >
+    <label class="form-check-label" for="shadow_toggle">No Shadow Class</label>
+</div>
+<div class="form-check form-switch">
+    <input
+      class="form-check-input body-class-toggle"
+      type="checkbox"
+      id="shadow_sm_toggle"
+      data-class="bslib-card-box-shadow-sm"
+      onchange="document.body.classList.toggle(this.dataset.class, this.checked)"
+    >
+    <label class="form-check-label" for="shadow_sm_toggle">Small Shadow Class</label>
+</div>
+<div class="form-check form-switch">
+    <input
+      class="form-check-input body-class-toggle"
+      type="checkbox"
+      id="shadow_lg_toggle"
+      data-class="bslib-card-box-shadow-lg"
+      onchange="document.body.classList.toggle(this.dataset.class, this.checked)"
+    >
+    <label class="form-check-label" for="shadow_lg_toggle">Large Shadow Class</label>
+</div>
+</fieldset>
+')
+
+
+global_sidebar <- function(..., fg = NULL, bg = NULL) {
+  sidebar(
+    title = "Sidebar",
+    fg = fg,
+    bg = bg,
+    "Shared sidebar",
+    input_dark_mode(id = "dark_mode"),
+    ...,
+    toggle_class_buttons
+  )
+}
+
+card_a_nav <-
+  navset_card_underline(
+    title = "A Nav Card",
+    sidebar = sidebar(
+      title = "Sidebar A",
+      width = "200px",
+      position = "left",
+      "Left sidebar"
+    ),
+    nav_panel("One", plotly::plotlyOutput("bars")),
+    nav_panel("Two", "Second panel in the nav card")
+  )
+
+card_a <-
+  card(
+    card_header("A Card"),
+    layout_sidebar(
+      fillable = TRUE,
+      sidebar = sidebar(
+        title = "Sidebar A",
+        width = "200px",
+        position = "left",
+        "Left sidebar"
+      ),
+      plotly::plotlyOutput("bars")
+    ),
+    card_footer("Footer A")
+  )
+
+card_b <-
+  card(
+    card_header("B Card"),
+    layout_sidebar(
+      sidebar = sidebar(
+        title = "Sidebar B",
+        width = "200px",
+        position = "right",
+        "Right sidebar"
+      ),
+      plotly::plotlyOutput("line")
+    ),
+    card_footer("Footer B")
+  )
+
+row_cards <- layout_columns(card_a_nav, card_b)
+
+row_value_boxes <-
+  layout_columns(
+    row_heights = "minmax(100px, 1fr)",
+    value_box(
+      "First",
+      "Thing One",
+      showcase = bsicons::bs_icon("pin-angle-fill")
+    ),
+    value_box(
+      "Second",
+      "Thing Two",
+      showcase = bsicons::bs_icon("boombox-fill")
+    )
+  )
+
+ui_navbar <- function(enable_dashboard = TRUE) {
+  page_navbar(
+    title = "Dashboard",
+    theme = bs_global_get(),
+    fillable = TRUE,
+    sidebar = global_sidebar(),
+    nav_spacer(),
+    nav_panel(
+      "Page",
+      row_value_boxes,
+      row_cards
+    )
+  )
+}
+
+ui_navbar_fillable <- function(...) {
+  page_navbar(
+    title = "Dashboard",
+    theme = bs_global_get(),
+    fillable = TRUE,
+    nav_spacer(),
+    nav_item(input_dark_mode(id = "dark_mode")),
+    nav_item(
+      popover(
+        bsicons::bs_icon("gear-fill"),
+        toggle_class_buttons
+      )
+    ),
+    nav_panel(
+      "Dash",
+      row_value_boxes,
+      row_cards
+    ),
+    nav_panel(
+      "About",
+      layout_columns(
+        card(
+          card_title("About this"),
+          lorem::ipsum(3, 2)
+        ),
+        card(
+          card_title("About that"),
+          lorem::ipsum(4, c(2, 1, 3, 2))
+        )
+      )
+    )
+  )
+}
+
+ui_sidebar <- function(enable_dashboard = TRUE) {
+  page_sidebar(
+    title = "Dashboard",
+    theme = bs_global_get(),
+    sidebar = global_sidebar(),
+    # bg = "green",
+    row_value_boxes,
+    row_cards
+  )
+}
+
+ui_fillable_navbar <- function(enable_dashboard = TRUE) {
+  page_fillable(
+    theme = bs_global_get(),
+    gap = 0,
+    padding = 0,
+    class = if (enable_dashboard) "bslib-page-dashboard",
+    navset_bar(
+      title = "Dashboard",
+      sidebar = global_sidebar(),
+      nav_spacer(),
+      nav_panel(
+        "Page",
+        class = "p-0 m-0",
+        row_value_boxes,
+        row_cards
+      ) |> htmltools::tagAppendAttributes(class = "m-0")
+    )
+  )
+}
+
+ui_fillable_sidebar <- function(enable_dashboard = TRUE) {
+  page_fillable(
+    theme = bs_global_get(),
+    gap = 0,
+    padding = 0,
+    class = if (enable_dashboard) "bslib-page-dashboard",
+    layout_sidebar(
+      sidebar = global_sidebar(),
+      h2("Dashboard"),
+      row_value_boxes,
+      row_cards
+    ) |> htmltools::tagAppendAttributes(class = "m-0")
+  )
+}
+
+abs_dark_mode <- input_dark_mode(
+  id = "dark_mode",
+  style = htmltools::css(
+    position = "absolute",
+    top = "1em",
+    right = "1em"
+  )
+)
+
+ui_flow_dash <- function(enable_dashboard = TRUE) {
+  set.seed(2023*11*15)
+
+  p <- page_fluid(
+    theme = bs_global_get(),
+    h2("Fluid Dashboard Page", class = "my-4"),
+    row_value_boxes,
+    lorem::ipsum(2, 2),
+    row_cards,
+    abs_dark_mode,
+    toggle_class_buttons
+  )
+
+  if (!enable_dashboard) return(p)
+
+  # In the tests, the dashboard class is added w/ client-side JS, but it could
+  # be done manually by directly calling body. This path is not directly tested,
+  # but is included for symmetry with the other UIs and for manual testing.
+  tags$body(class = "bslib-page-dashboard", p)
+}
+
+ui_flow_sidebar <- function(enable_dashboard = TRUE) {
+  set.seed(2023*11*15)
+
+  p <- page_fixed(
+    theme = bs_global_get(),
+    h2("Fixed Dashboard Page"),
+    layout_sidebar(
+      sidebar = global_sidebar(),
+      row_value_boxes,
+      lorem::ipsum(2, 2),
+      row_cards
+    )
+  )
+
+  if (!enable_dashboard) return(p)
+
+  tags$body(class = "bslib-page-dashboard", p)
+}
+
+ui_fillable_nested <- function(enable_dashboard = TRUE) {
+  page_fillable(
+    class = if (enable_dashboard) "bslib-page-dashboard main",
+    theme = bs_global_get(),
+    row_value_boxes,
+    card(
+      card_header("Outer Plots Card"),
+      class = "p-0",
+      layout_sidebar(
+        sidebar = global_sidebar(),
+        row_cards
+      )
+    )
+  )
+}
+
+server <- function(input, output, session) {
+  plotly_defaults <- function(p) {
+    p <- plotly::layout(
+      p,
+      margin = list(l = 0, r = 0, t = 0, b = 0),
+      font = list(
+        family = "Open Sans",
+        color = if (input$dark_mode == "dark") "white" else "#1D1F21"
+      ),
+      yaxis = list(gridcolor = if (input$dark_mode == "dark") "#303030"),
+      xaxis = list(gridcolor = if (input$dark_mode == "dark") "#303030"),
+      plot_bgcolor = "transparent",
+      paper_bgcolor = "transparent"
+    )
+
+    plotly::config(p, displayModeBar = FALSE)
+  }
+
+  output$bars <- plotly::renderPlotly({
+    plotly::plot_ly(
+      data.frame(
+        x = factor(1:5, labels = c("Fair", "Good", "Better", "Best", "Ideal")),
+        y = c(1610, 5002, 13234, 16905, 21551)
+      ),
+      x = ~x,
+      y = ~y
+    ) |>
+    plotly_defaults()
+  })
+
+  output$line <- plotly::renderPlotly({
+    set.seed(4323)
+
+    plotly::plot_ly(
+      data.frame(
+        x = seq.Date(as.Date("2020-01-01"), as.Date("2021-01-01"), by = "day"),
+        y = cumsum(rnorm(367, sd = 4))
+      ),
+      x = ~x,
+      y = ~y,
+      type = "scatter",
+      mode = "lines"
+    ) |>
+      plotly_defaults()
+  })
+}
+
+ui <- function(req) {
+  q <- parseQueryString(req$QUERY_STRING)
+  if (is.null(q$ui)) q$ui <- "navbar"
+  q$ui <- gsub("-", "_", q$ui)
+  if (is.null(q$preset)) q$preset <- "shiny"
+  if (is.null(q$dashboard_class)) q$dashboard_class <- FALSE
+
+  args <- list(
+    version = 5,
+    preset = q$preset,
+    bslib_dashboard_design = q[["dashboard"]],
+    bslib_enable_shadows = q[["shadows"]]
+  )
+
+  cli::cli_h1("New app scenario")
+  cli::cli_dl(c(args, dashboard_class = q$dashboard_class))
+
+  do.call(bs_global_theme, purrr::compact(args))
+
+  switch(
+    q$ui,
+    navbar = ui_navbar(q$dashboard_class),
+    sidebar = ui_sidebar(q$dashboard_class),
+    fillable_navbar = ui_fillable_navbar(enable_dashboard = q$dashboard_class),
+    fillable_sidebar = ui_fillable_sidebar(enable_dashboard = q$dashboard_class),
+    flow_dash = ui_flow_dash(enable_dashboard = q$dashboard_class),
+    flow_sidebar = ui_flow_sidebar(enable_dashboard = q$dashboard_class),
+    fillable_nested = ui_fillable_nested(enable_dashboard = q$dashboard_class),
+    navbar_fillable = ui_navbar_fillable()
+  )
+}
+
+shinyApp(ui, server)
diff --git a/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat.R b/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat.R
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+shinytest2::test_app()
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diff --git a/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat/setup-shinytest2.R b/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat/setup-shinytest2.R
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--- /dev/null
+++ b/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat/setup-shinytest2.R
@@ -0,0 +1,3 @@
+# Load application support files into testing environment
+shinytest2::load_app_env()
+
diff --git a/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat/test-317-bslib-preset-shiny-dashboard.R b/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat/test-317-bslib-preset-shiny-dashboard.R
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--- /dev/null
+++ b/inst/apps/317-bslib-preset-shiny-dashboard/tests/testthat/test-317-bslib-preset-shiny-dashboard.R
@@ -0,0 +1,207 @@
+library(shinytest2)
+library(glue)
+
+# R Version to limit variants ---------------------------------
+resolve_r_version <- function(name) {
+  rver <- jsonlite::fromJSON(
+    glue("https://api.r-hub.io/rversions/resolve/{name}")
+  )
+  paste0(
+    strsplit(rver$version, ".", fixed = TRUE)[[1]][1:2],
+    collapse = "."
+  )
+}
+
+r_release <- resolve_r_version("release")
+
+if (platform_variant() != paste0("mac-", r_release)) {
+  skip("Screenshots only on MacOS with R-release")
+}
+
+this_platform <- platform_variant()
+this_platform <- sub(r_release, "release", this_platform, fixed = TRUE)
+
+# Setup App  --------------------------------------------------
+new_app_driver <- function(
+  app_dir = testthat::test_path("../../"),
+  height = 800,
+  width = 1200,
+  ...
+) {
+  AppDriver$new(
+    app_dir,
+    name = "317-bslib-preset-shiny-dashboard",
+    variant = this_platform,
+    height = height,
+    width = width,
+    seed = 2023 * 11 * 13,
+    view = interactive(),
+    options = list(bslib.precompiled = FALSE),
+    screenshot_args = list(
+      selector = "viewport",
+      delay = 1,
+      options = list(captureBeyondViewport = FALSE)
+    ),
+    ...
+  )
+}
+
+app <- new_app_driver()
+withr::defer(app$stop())
+
+# shinytest2_js <- local({
+#   js_file <- system.file("internal", "js", "shiny-tracer.js", package = "shinytest2")
+#   js_content <- readLines(js_file)
+#   paste(js_content, collapse = "\n")
+# })
+
+app_for_variant <- function(app, ..., height = 800, width = 1200) {
+  params <- list(...)
+  params <- purrr::compact(params)
+  params <- purrr::imap(params, function(value, name) sprintf("%s=%s", name, value))
+  params <- paste0(params, collapse = "&")
+
+  url <- sprintf("%s?%s", app$get_url(), params)
+
+  new_app_driver(url, height = height, width = width)
+}
+
+app_types <- c(
+  "navbar",
+  "sidebar",
+  "fillable-navbar",
+  "fillable-sidebar",
+  "flow-dash",
+  "flow-sidebar",
+  "fillable-nested"
+)
+
+app_get_toggle_state <- function(app, id) {
+  app$get_js(glue("document.getElementById('{id}').checked"))
+}
+
+app_set_toggle_state <- function(app, ...) {
+  states <- list(...)
+  for (id in names(states)) {
+    state <- tolower(states[[id]])
+    app$run_js(glue(.open = "{{", .close = "}}", "
+      const toggle = document.getElementById('{{id}}')
+      const changed = toggle.checked !== {{state}}
+      if (changed) {
+        toggle.checked = {{state}}
+        toggle.onchange.call(toggle)
+      }
+    "))
+
+    app$wait_for_js(glue("document.getElementById('{id}').checked === {state}"))
+  }
+}
+
+variant_settings <- function(
+  app,
+  dashboard_toggle = FALSE,
+  shadow_toggle = FALSE,
+  shadow_sm_toggle = FALSE,
+  shadow_lg_toggle = FALSE
+) {
+  # Both enables desired toggles, while ensuring others are disabled. This
+  # doesn't go through `app$set_inputs()` or `app$get_values()` because those
+  # don't currently work when the app is reloaded (missing testmode js).
+  app_set_toggle_state(
+    app,
+    dashboard_toggle = dashboard_toggle,
+    shadow_toggle = shadow_toggle,
+    shadow_sm_toggle = shadow_sm_toggle,
+    shadow_lg_toggle = shadow_lg_toggle
+  )
+
+  expect_equal(dashboard_toggle, app_get_toggle_state(app, "dashboard_toggle"))
+  expect_equal(shadow_toggle,    app_get_toggle_state(app, "shadow_toggle"))
+  expect_equal(shadow_sm_toggle, app_get_toggle_state(app, "shadow_sm_toggle"))
+  expect_equal(shadow_lg_toggle, app_get_toggle_state(app, "shadow_lg_toggle"))
+}
+
+for (app_type in app_types) {
+  expect_screenshot <- function(app, variant) {
+    app$expect_screenshot(
+      threshold = 15,
+      name = glue("{app_type}_{variant}")
+    )
+  }
+
+  describe(app_type, {
+    app_variant <- NULL
+    is_flow <- grepl("^flow", app_type)
+
+    it("loads the app UI variant", {
+      app_variant <<- app_for_variant(
+        app,
+        ui = app_type,
+        width = if (is_flow)  1000 else 1200,
+        height = if (is_flow) 1200 else 800
+      )
+
+      expect_false(is.null(app_variant))
+    })
+
+    skip_if(is.null(app_variant), "Failed to load app variant")
+    withr::defer(app_variant$stop())
+
+    it("light mode", {
+      variant_settings(app_variant) # ensure toggles are all off
+      expect_screenshot(app_variant, "01_mode_light")
+    })
+
+    add_dashboard <- !app_type %in% c("navbar", "sidebar")
+
+    if (add_dashboard) {
+      it("with bslib-page-dashboard class", {
+        variant_settings(app_variant, dashboard_toggle = add_dashboard)
+        expect_screenshot(app_variant, "02_class_dashboard")
+      })
+    }
+
+    it("no shadows", {
+      variant_settings(app_variant, shadow_toggle = TRUE, dashboard_toggle = add_dashboard)
+      expect_screenshot(app_variant, "03_class_no-shadow")
+    })
+
+    it("small shadows", {
+      variant_settings(app_variant, shadow_sm_toggle = TRUE, dashboard_toggle = add_dashboard)
+      expect_screenshot(app_variant, "04_class_small-shadow")
+    })
+
+    it("dark mode", {
+      variant_settings(app_variant, dashboard_toggle = add_dashboard)
+      app_variant$run_js("document.documentElement.dataset.bsTheme='dark'")
+      app_variant$wait_for_js("document.documentElement.dataset.bsTheme === 'dark'")
+      Sys.sleep(1) # wait for transition
+      expect_screenshot(app_variant, "05_mode_dark")
+    })
+
+    it("classic mode (default)", {
+      app_classic <- app_for_variant(
+        app,
+        ui = app_type,
+        dashboard = "false",
+        width = if (is_flow)  1000 else 1200,
+        height = if (is_flow) 1200 else 800
+      )
+      withr::defer(app_classic$stop())
+      expect_screenshot(app_classic, "06_classic")
+    })
+
+    it("classic mode (with shadows)", {
+      app_classic_shade <- app_for_variant(
+        app,
+        ui = app_type,
+        dashboard = "false",
+        shadows = "true",
+        width = if (is_flow)  1000 else 1200,
+        height = if (is_flow) 1200 else 800
+      )
+      withr::defer(app_classic_shade$stop())
+      expect_screenshot(app_classic_shade, "07_classic_shadows")
+    })
+  })
+}