diff --git a/test/functional/ui/mouse_spec.lua b/test/functional/ui/mouse_spec.lua
index 7dc574b062..e0e0829372 100644
--- a/test/functional/ui/mouse_spec.lua
+++ b/test/functional/ui/mouse_spec.lua
@@ -154,6 +154,7 @@ describe('ui/mouse/input', function()
 
     it('in tabline to the left moves tab left', function()
       if helpers.skip_fragile(pending,
+        true or -- #6851
         os.getenv("TRAVIS") and (helpers.os_name() == "osx"
           or os.getenv("CLANG_SANITIZER") == "ASAN_UBSAN"))  -- #4874
       then
@@ -259,6 +260,7 @@ describe('ui/mouse/input', function()
 
     it('out of tabline to the left moves tab left', function()
       if helpers.skip_fragile(pending,
+        true or -- #6851
         os.getenv("TRAVIS") and (helpers.os_name() == "osx"
           or os.getenv("CLANG_SANITIZER") == "ASAN_UBSAN"))  -- #4874
       then