diff --git a/tests/data_indices/test_collection.py b/tests/data_indices/test_collection.py
index 78b3ecd..8505f8a 100644
--- a/tests/data_indices/test_collection.py
+++ b/tests/data_indices/test_collection.py
@@ -19,12 +19,10 @@ def data_indices():
             "data": {
                 "forcing": ["x", "e"],
                 "diagnostic": ["z", "q"],
-                "remapped": [
-                    {
-                        "e": ["e_1", "e_2"],
-                        "d": ["d_1", "d_2"],
-                    }
-                ],
+                "remapped": {
+                    "e": ["e_1", "e_2"],
+                    "d": ["d_1", "d_2"],
+                },
             },
         },
     )
diff --git a/tests/preprocessing/test_preprocessor_imputer.py b/tests/preprocessing/test_preprocessor_imputer.py
index e161c12..5218efc 100644
--- a/tests/preprocessing/test_preprocessor_imputer.py
+++ b/tests/preprocessing/test_preprocessor_imputer.py
@@ -26,7 +26,7 @@ def non_default_input_imputer():
                 "imputer": {"default": "none", "mean": ["y"], "maximum": ["x"], "none": ["z"], "minimum": ["q"]},
                 "forcing": ["z", "q"],
                 "diagnostic": ["other"],
-                "remapped": [],
+                "remapped": {},
             },
         },
     )
diff --git a/tests/preprocessing/test_preprocessor_normalizer.py b/tests/preprocessing/test_preprocessor_normalizer.py
index 9432b83..cc527e7 100644
--- a/tests/preprocessing/test_preprocessor_normalizer.py
+++ b/tests/preprocessing/test_preprocessor_normalizer.py
@@ -25,7 +25,7 @@ def input_normalizer():
                 "normalizer": {"default": "mean-std", "min-max": ["x"], "max": ["y"], "none": ["z"], "mean-std": ["q"]},
                 "forcing": ["z", "q"],
                 "diagnostic": ["other"],
-                "remapped": [],
+                "remapped": {},
             },
         },
     )
diff --git a/tests/preprocessing/test_preprocessor_remapper.py b/tests/preprocessing/test_preprocessor_remapper.py
index d5bd52a..86bdfde 100644
--- a/tests/preprocessing/test_preprocessor_remapper.py
+++ b/tests/preprocessing/test_preprocessor_remapper.py
@@ -28,11 +28,9 @@ def input_remapper():
                 },
                 "forcing": ["z", "q"],
                 "diagnostic": ["other"],
-                "remapped": [
-                    {
-                        "d": ["cos_d", "sin_d"],
-                    }
-                ],
+                "remapped": {
+                    "d": ["cos_d", "sin_d"],
+                },
             },
         },
     )