diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000000000000000000000000000000000000..42c76b4dac736add2093bfdf01a7411f679b2c4a
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,3 @@
+[pytest]
+markers =
+  slow: mark test as slow
\ No newline at end of file