diff --git a/python/ngen_cal/tests/test_params.py b/python/ngen_cal/tests/test_params.py
new file mode 100644
index 00000000..5b680f6e
--- /dev/null
+++ b/python/ngen_cal/tests/test_params.py
@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+from ngen.cal.ngen import _params_as_df
+import pandas as pd
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from typing import Mapping
+    from ngen.cal.parameter import Parameter
+
+def test_multi_params(multi_model_shared_params: Mapping[str, list[Parameter]]):
+    # This is essentially the path the params go through from
+    # creation in model.py to update in search.py
+    params = _params_as_df(multi_model_shared_params)
+    params = pd.DataFrame(params).rename(columns={'init':'0'})
+    # create new iteration from old
+    params['1'] = params['0']
+    #update the parameters by index
+    params.loc[0, '1'] = 0.5
+    pa = params[ params['model'] == 'A' ]
+    pb = params[ params['model'] == 'B' ]
+
+    assert pa.drop('model', axis=1).equals( pb.drop('model', axis=1) )
+
+# TODO test/document case where params have same name but different min/max/init values