diff --git a/inst/apps/041-dynamic-ui/tests/testthat/_snaps/linux-4.0/mytest/022.png b/inst/apps/041-dynamic-ui/tests/testthat/_snaps/linux-4.0/mytest/022.png
index d9b2bc9935..aa71877cbf 100644
Binary files a/inst/apps/041-dynamic-ui/tests/testthat/_snaps/linux-4.0/mytest/022.png and b/inst/apps/041-dynamic-ui/tests/testthat/_snaps/linux-4.0/mytest/022.png differ
diff --git a/inst/apps/041-dynamic-ui/tests/testthat/test-mytest.R b/inst/apps/041-dynamic-ui/tests/testthat/test-mytest.R
index ffa58cce94..c2fef8a71a 100644
--- a/inst/apps/041-dynamic-ui/tests/testthat/test-mytest.R
+++ b/inst/apps/041-dynamic-ui/tests/testthat/test-mytest.R
@@ -55,7 +55,9 @@ test_that("Migrated shinytest test: mytest.R", {
   app$expect_screenshot()
 
   app$set_inputs(input_type = "date")
+  app$wait_for_idle() # linux 4.0 has some issues; add some delay
   app$set_inputs(dynamic = "2020-01-31")
+  app$wait_for_idle() # linux 4.0 has some issues; add some delay
   app$expect_values()
   app$expect_screenshot()