diff --git a/runtime/compiler/pytest.vim b/runtime/compiler/pytest.vim
new file mode 100644
index 0000000..7fc1899
--- /dev/null
+++ b/runtime/compiler/pytest.vim
@@ -0,0 +1,103 @@
+" Vim compiler file
+" Compiler:     Pytest (Python testing framework)
+" Maintainer:   @Konfekt and @mgedmin
+" Last Change:  2024 Nov 28
+
+if exists("current_compiler") | finish | endif
+let current_compiler = "pytest"
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+" CompilerSet makeprg=pytest
+if has('unix')
+  execute $'CompilerSet makeprg=/usr/bin/env\ PYTHONWARNINGS=ignore\ pytest\ {escape(get(b:, 'pytest_makeprg_params', get(g:, 'pytest_makeprg_params', '--tb=short --quiet')), ' \|"')}'
+elseif has('win32')
+  execute $'CompilerSet makeprg=set\ PYTHONWARNINGS=ignore\ &&\ pytest\ {escape(get(b:, 'pytest_makeprg_params', get(g:, 'pytest_makeprg_params', '--tb=short --quiet')), ' \|"')}'
+else
+  CompilerSet makeprg=pytest\ --tb=short\ --quiet
+  execute $'CompilerSet makeprg=pytest\ {escape(get(b:, 'pytest_makeprg_params', get(g:, 'pytest_makeprg_params', '--tb=short --quiet')), ' \|"')}'
+endif
+
+" Pytest syntax errors                                          {{{2
+
+" Reset error format so that sourcing .vimrc again and again doesn't grow it
+" without bounds
+setlocal errorformat&
+
+" For the record, the default errorformat is this:
+"
+"   %*[^"]"%f"%*\D%l: %m
+"   "%f"%*\D%l: %m
+"   %-G%f:%l: (Each undeclared identifier is reported only once
+"   %-G%f:%l: for each function it appears in.)
+"   %-GIn file included from %f:%l:%c:
+"   %-GIn file included from %f:%l:%c\,
+"   %-GIn file included from %f:%l:%c
+"   %-GIn file included from %f:%l
+"   %-G%*[ ]from %f:%l:%c
+"   %-G%*[ ]from %f:%l:
+"   %-G%*[ ]from %f:%l\,
+"   %-G%*[ ]from %f:%l
+"   %f:%l:%c:%m
+"   %f(%l):%m
+"   %f:%l:%m
+"   "%f"\, line %l%*\D%c%*[^ ] %m
+"   %D%*\a[%*\d]: Entering directory %*[`']%f'
+"   %X%*\a[%*\d]: Leaving directory %*[`']%f'
+"   %D%*\a: Entering directory %*[`']%f'
+"   %X%*\a: Leaving directory %*[`']%f'
+"   %DMaking %*\a in %f
+"   %f|%l| %m
+"
+" and sometimes it misfires, so let's fix it up a bit
+" (TBH I don't even know what compiler produces filename(lineno) so why even
+" have it?)
+setlocal errorformat-=%f(%l):%m
+
+" Sometimes Vim gets confused about ISO-8601 timestamps and thinks they're
+" filenames; this is a big hammer that ignores anything filename-like on lines
+" that start with at least two spaces, possibly preceded by a number and
+" optional punctuation
+setlocal errorformat^=%+G%\\d%#%.%\\=\ \ %.%#
+
+" Similar, but when the entire line starts with a date
+setlocal errorformat^=%+G\\d\\d\\d\\d-\\d\\d-\\d\\d\ \\d\\d:\\d\\d%.%#
+
+" make: *** [Makefile:14: target] Error 1
+setlocal errorformat^=%+Gmake:\ ***\ %.%#
+
+" FAILED tests.py::test_with_params[YYYY-MM-DD:HH:MM:SS] - Exception: bla bla
+setlocal errorformat^=%+GFAILED\ %.%#
+
+" AssertionError: assert ...YYYY-MM-DD:HH:MM:SS...
+setlocal errorformat^=%+GAssertionError:\ %.%#
+
+" --- /path/to/file:before  YYYY-MM-DD HH:MM:SS.ssssss
+setlocal errorformat^=---%f:%m
+
+" +++ /path/to/file:before  YYYY-MM-DD HH:MM:SS.ssssss
+setlocal errorformat^=+++%f:%m
+
+" Sometimes pytest prepends an 'E' marker at the beginning of a traceback line
+setlocal errorformat+=E\ %#File\ \"%f\"\\,\ line\ %l%.%#
+
+" Python tracebacks (unittest + doctest output)                 {{{2
+
+" This collapses the entire traceback into just the last file+lineno,
+" which is convenient when you want to jump to the line that failed (and not
+" the top-level entry point), but it makes it impossible to see the full
+" traceback, which sucks.
+""setlocal errorformat+=
+""            \File\ \"%f\"\\,\ line\ %l%.%#,
+""            \%C\ %.%#,
+""            \%-A\ \ File\ \"unittest%.py\"\\,\ line\ %.%#,
+""            \%-A\ \ File\ \"%f\"\\,\ line\ 0%.%#,
+""            \%A\ \ File\ \"%f\"\\,\ line\ %l%.%#,
+""            \%Z%[%^\ ]%\\@=%m
+setlocal errorformat+=File\ \"%f\"\\,\ line\ %l\\,%#%m
+
+exe 'CompilerSet errorformat='..escape(&l:errorformat, ' \|"')
+
+let &cpo = s:cpo_save
+unlet s:cpo_save