diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..4567943
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,4 @@
+[pytest]
+markers =
+    uses_geopandas: marks tests that use Geopandas (deselect with '-m "not uses_geopandas"')
+    serial