diff --git a/pytest.ini b/pytest.ini
index 87bc6f07cdb3..37bffa63e8f6 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,6 +1,10 @@
 [pytest]
 addopts = -l
 junit_family=xunit2
+markers =
+    slow: Tests that are very slow.
+	xslow: Mark test as extremely slow (not run unless explicitly requested.
+	xfail_on_32bit: mark test as failing on 32-bit platforms
 
 filterwarnings =
     error