diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 8a51d2a9d3..eb68e24acf 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -1874,6 +1874,7 @@ local filename = {
   ['.clangd'] = 'yaml',
   ['.clang-format'] = 'yaml',
   ['.clang-tidy'] = 'yaml',
+  ['pixi.lock'] = 'yaml',
   ['yarn.lock'] = 'yaml',
   matplotlibrc = 'yaml',
   ['.condarc'] = 'yaml',
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index d1551885b1..222cdb9504 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -890,7 +890,7 @@ func s:GetFilenameChecks() abort
     \ 'xslt': ['file.xsl', 'file.xslt'],
     \ 'yacc': ['file.yy', 'file.yxx', 'file.y++'],
     \ 'yaml': ['file.yaml', 'file.yml', 'file.eyaml', 'any/.bundle/config', '.clangd', '.clang-format', '.clang-tidy', 'file.mplstyle', 'matplotlibrc', 'yarn.lock',
-    \          '/home/user/.kube/config', '.condarc', 'condarc'],
+    \          '/home/user/.kube/config', '.condarc', 'condarc', 'pixi.lock'],
     \ 'yang': ['file.yang'],
     \ 'yuck': ['file.yuck'],
     \ 'z8a': ['file.z8a'],