diff --git a/runtime/lua/vim/lsp/diagnostic.lua b/runtime/lua/vim/lsp/diagnostic.lua
index 01c675ba77407b..48c0dd92cb2cd6 100644
--- a/runtime/lua/vim/lsp/diagnostic.lua
+++ b/runtime/lua/vim/lsp/diagnostic.lua
@@ -446,14 +446,6 @@ end
 ---
 ---@deprecated Prefer |vim.diagnostic._set_signs()|
 ---
---- Sign characters can be customized with the following commands:
----
---- <pre>
---- sign define LspDiagnosticsSignError text=E texthl=LspDiagnosticsSignError linehl= numhl=
---- sign define LspDiagnosticsSignWarning text=W texthl=LspDiagnosticsSignWarning linehl= numhl=
---- sign define LspDiagnosticsSignInformation text=I texthl=LspDiagnosticsSignInformation linehl= numhl=
---- sign define LspDiagnosticsSignHint text=H texthl=LspDiagnosticsSignHint linehl= numhl=
---- </pre>
 ---@param diagnostics Diagnostic[]
 ---@param bufnr number The buffer number
 ---@param client_id number the client id
@@ -478,15 +470,6 @@ end
 ---
 ---@deprecated Prefer |vim.diagnostic._set_underline()|
 ---
---- Underline highlights can be customized by changing the following |:highlight| groups.
----
---- <pre>
---- LspDiagnosticsUnderlineError
---- LspDiagnosticsUnderlineWarning
---- LspDiagnosticsUnderlineInformation
---- LspDiagnosticsUnderlineHint
---- </pre>
----
 ---@param diagnostics Diagnostic[]
 ---@param bufnr number: The buffer number
 ---@param client_id number: The client id
@@ -506,15 +489,6 @@ end
 ---
 ---@deprecated Prefer |vim.diagnostic._set_virtual_text()|
 ---
---- Virtual text highlights can be customized by changing the following |:highlight| groups.
----
---- <pre>
---- LspDiagnosticsVirtualTextError
---- LspDiagnosticsVirtualTextWarning
---- LspDiagnosticsVirtualTextInformation
---- LspDiagnosticsVirtualTextHint
---- </pre>
----
 ---@param diagnostics Diagnostic[]
 ---@param bufnr number
 ---@param client_id number
diff --git a/runtime/plugin/diagnostic.vim b/runtime/plugin/diagnostic.vim
index 45d75b79bf9155..2183623ac894dc 100644
--- a/runtime/plugin/diagnostic.vim
+++ b/runtime/plugin/diagnostic.vim
@@ -24,25 +24,3 @@ hi default link DiagnosticSignError DiagnosticError
 hi default link DiagnosticSignWarn DiagnosticWarn
 hi default link DiagnosticSignInfo DiagnosticInfo
 hi default link DiagnosticSignHint DiagnosticHint
-
-" Link LspDiagnostics for backward compatibility
-hi default link LspDiagnosticsDefaultHint DiagnosticHint
-hi default link LspDiagnosticsVirtualTextHint DiagnosticVirtualTextHint
-hi default link LspDiagnosticsFloatingHint DiagnosticFloatingHint
-hi default link LspDiagnosticsSignHint DiagnosticSignHint
-hi default link LspDiagnosticsDefaultError DiagnosticError
-hi default link LspDiagnosticsVirtualTextError DiagnosticVirtualTextError
-hi default link LspDiagnosticsFloatingError DiagnosticFloatingError
-hi default link LspDiagnosticsSignError DiagnosticSignError
-hi default link LspDiagnosticsDefaultWarning DiagnosticWarn
-hi default link LspDiagnosticsVirtualTextWarning DiagnosticVirtualTextWarn
-hi default link LspDiagnosticsFloatingWarning DiagnosticFloatingWarn
-hi default link LspDiagnosticsSignWarning DiagnosticSignWarn
-hi default link LspDiagnosticsDefaultInformation DiagnosticInfo
-hi default link LspDiagnosticsVirtualTextInformation DiagnosticVirtualTextInfo
-hi default link LspDiagnosticsFloatingInformation DiagnosticFloatingInfo
-hi default link LspDiagnosticsSignInformation DiagnosticSignInfo
-hi default link LspDiagnosticsUnderlineError DiagnosticUnderlineError
-hi default link LspDiagnosticsUnderlineWarning DiagnosticUnderlineWarn
-hi default link LspDiagnosticsUnderlineInformation DiagnosticUnderlineInfo
-hi default link LspDiagnosticsUnderlineHint DiagnosticUnderlineHint
diff --git a/test/functional/plugin/lsp/diagnostic_spec.lua b/test/functional/plugin/lsp/diagnostic_spec.lua
index 2a6d7de634ab4a..353de667ea751d 100644
--- a/test/functional/plugin/lsp/diagnostic_spec.lua
+++ b/test/functional/plugin/lsp/diagnostic_spec.lua
@@ -1,6 +1,5 @@
 local helpers = require('test.functional.helpers')(after_each)
 
-local command = helpers.command
 local clear = helpers.clear
 local exec_lua = helpers.exec_lua
 local eq = helpers.eq
@@ -945,31 +944,4 @@ describe('vim.lsp.diagnostic', function()
       assert(loc_list[1].lnum < loc_list[2].lnum)
     end)
   end)
-
-  it('highlight groups', function()
-    command('runtime plugin/diagnostic.vim')
-    eq({
-      'LspDiagnosticsDefaultError',
-      'LspDiagnosticsDefaultHint',
-      'LspDiagnosticsDefaultInformation',
-      'LspDiagnosticsDefaultWarning',
-      'LspDiagnosticsFloatingError',
-      'LspDiagnosticsFloatingHint',
-      'LspDiagnosticsFloatingInformation',
-      'LspDiagnosticsFloatingWarning',
-      'LspDiagnosticsSignError',
-      'LspDiagnosticsSignHint',
-      'LspDiagnosticsSignInformation',
-      'LspDiagnosticsSignWarning',
-      'LspDiagnosticsUnderlineError',
-      'LspDiagnosticsUnderlineHint',
-      'LspDiagnosticsUnderlineInformation',
-      'LspDiagnosticsUnderlineWarning',
-      'LspDiagnosticsVirtualTextError',
-      'LspDiagnosticsVirtualTextHint',
-      'LspDiagnosticsVirtualTextInformation',
-      'LspDiagnosticsVirtualTextWarning',
-    }, exec_lua([[return vim.fn.getcompletion('Lsp', 'highlight')]]))
-  end)
-
 end)