diff --git a/ammico/model.py b/ammico/model.py
index 80cc31f..cdc1161 100644
--- a/ammico/model.py
+++ b/ammico/model.py
@@ -27,6 +27,15 @@ class MultimodalSummaryModel:
             cache_dir: huggingface cache dir (optional).
         """
         self.device = self._resolve_device(device)
+
+        if model_id is not None and model_id not in (
+            self.DEFAULT_CUDA_MODEL,
+            self.DEFAULT_CPU_MODEL,
+        ):
+            raise ValueError(
+                f"model_id must be one of {self.DEFAULT_CUDA_MODEL} or {self.DEFAULT_CPU_MODEL}"
+            )
+
         self.model_id = model_id or (
             self.DEFAULT_CUDA_MODEL if self.device == "cuda" else self.DEFAULT_CPU_MODEL
         )
@@ -94,6 +103,12 @@ class MultimodalSummaryModel:
             if self.model is not None:
                 del self.model
                 self.model = None
+            if self.processor is not None:
+                del self.processor
+                self.processor = None
+            if self.tokenizer is not None:
+                del self.tokenizer
+                self.tokenizer = None
         finally:
             try:
                 if torch.cuda.is_available():
diff --git a/ammico/test/conftest.py b/ammico/test/conftest.py
index cb42774..2010e1e 100644
--- a/ammico/test/conftest.py
+++ b/ammico/test/conftest.py
@@ -1,5 +1,6 @@
 import os
 import pytest
+from ammico.model import MultimodalSummaryModel
 
 
 @pytest.fixture
@@ -46,3 +47,12 @@ def get_test_my_dict(get_path):
         },
     }
     return test_my_dict
+
+
+@pytest.fixture(scope="session")
+def model():
+    m = MultimodalSummaryModel(device="cpu")
+    try:
+        yield m
+    finally:
+        m.close()
diff --git a/ammico/test/test_model.py b/ammico/test/test_model.py
new file mode 100644
index 0000000..ac652c0
--- /dev/null
+++ b/ammico/test/test_model.py
@@ -0,0 +1,27 @@
+import pytest
+import torch
+from ammico.model import MultimodalSummaryModel
+
+
+def test_model_init(model):
+    assert model.model is not None
+    assert model.processor is not None
+    assert model.tokenizer is not None
+    assert model.device is not None
+
+
+def test_model_invalid_device():
+    with pytest.raises(ValueError):
+        MultimodalSummaryModel(device="invalid_device")
+
+
+def test_model_invalid_model_id():
+    with pytest.raises(ValueError):
+        MultimodalSummaryModel(model_id="non_existent_model", device="cpu")
+
+
+def test_free_resources():
+    model = MultimodalSummaryModel(device="cpu")
+    model.close()
+    assert model.model is None
+    assert model.processor is None
diff --git a/pyproject.toml b/pyproject.toml
index c0f5440..4f29217 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,10 +26,9 @@ dependencies = [
     "colour-science",
     "dash",
     "dash-bootstrap-components",
-    "decord",
     "deepface",
     "google-cloud-vision",
-    "googletrans-py", # instead of googletrans4.0.0rc1, for a temporary solution due the incompatibility with jupyterlab
+    "googletrans-py", # instead of googletrans4.0.0rc1, for a temporary solution due to incompatibility with jupyterlab
     "grpcio",
     "huggingface-hub>=0.34.0",
     "importlib_metadata",