2 files changed, 14 insertions, 0 deletions
diff --git a/test/functional/terminal/helpers.lua b/test/functional/terminal/helpers.lua
index bcfd3559e6..d69f3207f1 100644
--- a/test/functional/terminal/helpers.lua
+++ b/test/functional/terminal/helpers.lua
@@ -31,6 +31,8 @@ local function set_bg(num) feed_termcode('[48;5;'..num..'m') end
 local function set_bold() feed_termcode('[1m') end
 local function set_italic() feed_termcode('[3m') end
 local function set_underline() feed_termcode('[4m') end
+local function set_underdouble() feed_termcode('[4:2m') end
+local function set_undercurl() feed_termcode('[4:3m') end
 local function set_strikethrough() feed_termcode('[9m') end
 local function clear_attrs() feed_termcode('[0;10m') end
 -- mouse
@@ -116,6 +118,8 @@ return {
   set_bold = set_bold,
   set_italic = set_italic,
   set_underline = set_underline,
+  set_underdouble = set_underdouble,
+  set_undercurl = set_undercurl,
   set_strikethrough = set_strikethrough,
   clear_attrs = clear_attrs,
   enable_mouse = enable_mouse,
diff --git a/test/functional/terminal/highlight_spec.lua b/test/functional/terminal/highlight_spec.lua
index 28ca07d815..a119d4acd3 100644
--- a/test/functional/terminal/highlight_spec.lua
+++ b/test/functional/terminal/highlight_spec.lua
@@ -26,6 +26,8 @@ describe(':terminal highlight', function()
       [9] = {foreground = 130},
       [10] = {reverse = true},
       [11] = {background = 11},
+      [12] = {bold = true, underdouble = true},
+      [13] = {italic = true, undercurl = true},
     })
     screen:attach({rgb=false})
     command(("enew | call termopen(['%s'])"):format(testprg('tty-test')))
@@ -114,6 +116,14 @@ describe(':terminal highlight', function()
     thelpers.set_underline()
     thelpers.set_strikethrough()
   end)
+  descr('bold and underdouble', 12, function()
+    thelpers.set_bold()
+    thelpers.set_underdouble()
+  end)
+  descr('italics and undercurl', 13, function()
+    thelpers.set_italic()
+    thelpers.set_undercurl()
+  end)
 end)
 
 it(':terminal highlight has lower precedence than editor #9964', function()