Move config in pytest.ini to tox.ini.
diff --git a/pytest.ini b/pytest.ini
deleted file mode 100644
index 0567f80..0000000
--- a/pytest.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[pytest]
-addopts = -r s
-markers =
- requires_backend_interface: this test requires a specific backend interface
- supported: parametrized test requiring only_if and skip_message
diff --git a/tox.ini b/tox.ini
index 85a095b..677df7e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -76,3 +76,9 @@
[doc8]
extensions = rst
+
+[pytest]
+addopts = -r s
+markers =
+ requires_backend_interface: this test requires a specific backend interface
+ supported: parametrized test requiring only_if and skip_message