Handle flaky windows test by rerunning (#414)

Pipfile

@@ -9,6 +9,7 @@ tox = "*"
 flake8 = "==3.8.4" # also bump this in .pre-commit-config.yaml
 black = "==20.8b1" # also bump this in .pre-commit-config.yaml
 pre-commit = "*"
+pytest-rerunfailures = "*"
 
 [packages]
 pytest-html = {editable = true,path = "."}

testing/test_pytest_html.py

@@ -186,6 +186,7 @@ class TestHTML:
         assert_results(html, passed=0, failed=1)
         assert "AssertionError" in html
 
+    @pytest.mark.flaky(reruns=2)  # test is flaky on windows
     def test_rerun(self, testdir):
         testdir.makeconftest(
             """