diff --git a/README.rst b/README.rst
index 7a2c78d..31581c9 100755
--- a/README.rst
+++ b/README.rst
@@ -293,6 +293,16 @@ By default the test file is ``tests.py``.The global variable
 configures the test file to be ``/path/to/project/tests/test_myproj.py``
 (assuming the default value for the project test directory)
 
+Pytest Flags
+^^^^^^^^^^^^
+By default the pytest executable is run without flags. To pass extra flags the global
+variable ``pytest_extraflags`` may be used, for example::
+
+    let g:pytest_extraflags = '--testmon'
+
+will run pytest with the ``--testmon`` flag.
+
+
 License
 -------
 
diff --git a/ftplugin/python/pytest.vim b/ftplugin/python/pytest.vim
index 3be37cd..26e77f6 100755
--- a/ftplugin/python/pytest.vim
+++ b/ftplugin/python/pytest.vim
@@ -75,6 +75,12 @@ function! s:SetExecutable()
     endif
 endfunction
 
+function! s:SetExtraFlags()
+	if !exists("g:pytest_extraflags")
+		let g:pytest_extraflags = ""
+	endif
+endfunction
+
 function! s:LoopOnFail(type)
 
     augroup pytest_loop_autocmd
@@ -586,9 +592,9 @@ function! s:RunPyTest(path, ...) abort
     let g:pytest_last_session = ""
 
     if (len(parametrized) && parametrized != "0")
-        let cmd = g:pytest_executable . " -k " . parametrized . " " . extra_flags . " --tb=short " . a:path
+        let cmd = g:pytest_executable . " -k " . parametrized . " " . extra_flags . " " . g:pytest_extraflags . " --tb=short " . a:path
     else
-        let cmd = g:pytest_executable . " " . extra_flags . " --tb=short " . a:path
+        let cmd = g:pytest_executable . " " . extra_flags . " " . g:pytest_extraflags . " --tb=short " . a:path
     endif
 
     " NeoVim support