diff --git a/pymc_experimental/inference/pathfinder.py b/pymc_experimental/inference/pathfinder.py
index 1092341a0..85c1981ee 100644
--- a/pymc_experimental/inference/pathfinder.py
+++ b/pymc_experimental/inference/pathfinder.py
@@ -138,7 +138,7 @@ def one_step(state, rng_key):
 
     dims = {
         var_name: [dim for dim in dims if dim is not None]
-        for var_name, dims in model.RV_dims.items()
+        for var_name, dims in model.named_vars_to_dims.items()
     }
 
     idata = convert_flat_trace_to_idata(
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 000000000..ba9c51adb
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,6 @@
+[pytest]
+filterwarnings =
+    error
+    ignore:.*?(\b(pkg_resources\.declare_namespace)\b).*:DeprecationWarning
+    ignore::UserWarning:arviz.data.inference_data
+    ignore::DeprecationWarning:pkg_resources