diff --git a/test/functional/terminal/tui_spec.lua b/test/functional/terminal/tui_spec.lua
index 99f8693235..33b34dca97 100644
--- a/test/functional/terminal/tui_spec.lua
+++ b/test/functional/terminal/tui_spec.lua
@@ -117,6 +117,7 @@ describe('TUI :detach', function()
 
     local child_session = n.connect(child_server)
     finally(function()
+      -- Avoid a dangling process after :detach.
       child_session:request('nvim_command', 'qall!')
     end)
     local status, child_uis = child_session:request('nvim_list_uis')
@@ -3377,6 +3378,11 @@ describe('TUI', function()
 
     -- Attach another (non-TUI) UI to the child instance
     local alt = Screen.new(nil, nil, nil, child_session)
+    finally(function()
+      alt:detach()
+      -- Avoid a dangling process after :detach.
+      child_session:request('nvim_command', 'qall!')
+    end)
 
     -- Detach the first (primary) client so only the second UI is attached
     feed_data(':detach\n')
@@ -3385,8 +3391,6 @@ describe('TUI', function()
 
     -- osc52 should be cleared from termfeatures
     eq({ true, {} }, { child_session:request('nvim_eval', 'g:termfeatures') })
-
-    alt:detach()
   end)
 
   it('does not query the terminal for OSC 52 support when disabled', function()