diff --git a/node-hub/dora-phi4/dora_phi4/main.py b/node-hub/dora-phi4/dora_phi4/main.py
index 7c15160c..5e9944a8 100644
--- a/node-hub/dora-phi4/dora_phi4/main.py
+++ b/node-hub/dora-phi4/dora_phi4/main.py
@@ -1,13 +1,7 @@
-import io
-from urllib.request import urlopen
-
 import pyarrow as pa
-import requests
-import soundfile as sf
 import torch
 from accelerate import infer_auto_device_map
 from dora import Node
-from PIL import Image
 from transformers import (
     AutoModelForCausalLM,
     AutoProcessor,
@@ -18,9 +12,10 @@ from transformers import (
 if torch.cuda.is_available():
     device = "cuda"
     torch_dtype = torch.float16  # Use float16 for efficiency
-elif torch.backends.mps.is_available():
-    device = "mps"
-    torch_dtype = torch.float16  # Reduce memory usage for MPS
+# TODO: Uncomment this once phi4 support mps backend.
+# elif torch.backends.mps.is_available():
+# device = "mps"
+# torch_dtype = torch.float16  # Reduce memory usage for MPS
 else:
     device = "cpu"
     torch_dtype = torch.bfloat16  # CPU uses bfloat16 for efficiency
@@ -29,7 +24,9 @@ else:
 # Load the model and processor
 MODEL_PATH = "microsoft/Phi-4-multimodal-instruct"
 
-processor = AutoProcessor.from_pretrained(MODEL_PATH, trust_remote_code=True)
+processor = AutoProcessor.from_pretrained(
+    MODEL_PATH, trust_remote_code=True, use_fast=True
+)
 
 # Define model config
 MODEL_CONFIG = {
@@ -42,66 +39,20 @@ MODEL_CONFIG = {
 }
 
 # Infer device map without full initialization
-device_map = infer_auto_device_map(AutoModelForCausalLM.from_pretrained(MODEL_PATH, **MODEL_CONFIG))
+device_map = infer_auto_device_map(
+    AutoModelForCausalLM.from_pretrained(MODEL_PATH, **MODEL_CONFIG)
+)
 
 # Load the model directly with the inferred device map
-model = AutoModelForCausalLM.from_pretrained(MODEL_PATH, **MODEL_CONFIG, device_map=device_map)
+model = AutoModelForCausalLM.from_pretrained(
+    MODEL_PATH, **MODEL_CONFIG, device_map=device_map
+)
 
 generation_config = GenerationConfig.from_pretrained(MODEL_PATH)
 
-# Define prompt structure
-USER_PROMPT = "<|user|>"
-ASSISTANT_PROMPT = "<|assistant|>"
-PROMPT_SUFFIX = "<|end|>"
-
-
-def process_image(image_url):
-    """Processes an image through the model and returns the response."""
-    prompt = f"{USER_PROMPT}<|image_1|>What is shown in this image?{PROMPT_SUFFIX}{ASSISTANT_PROMPT}"
-
-    # Download and open image
-    image = Image.open(requests.get(image_url, stream=True).raw)
-
-    # Process input
-    inputs = processor(text=prompt, images=image, return_tensors="pt").to(model.device)
-
-    # Generate response
-    with torch.no_grad():
-        generate_ids = model.generate(
-            **inputs, max_new_tokens=512, generation_config=generation_config,
-        )
-        generate_ids = generate_ids[:, inputs["input_ids"].shape[1] :]
-
-    response = processor.batch_decode(
-        generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False,
-    )[0]
-    return response
-
-
-def process_audio(audio_url):
-    """Processes an audio file through the model and returns the transcript + translation."""
-    speech_prompt = "Transcribe the audio to text, and then translate the audio to French. Use <sep> as a separator."
-    prompt = f"{USER_PROMPT}<|audio_1|>{speech_prompt}{PROMPT_SUFFIX}{ASSISTANT_PROMPT}"
-
-    # Download and read audio file
-    audio, samplerate = sf.read(io.BytesIO(urlopen(audio_url).read()))
-
-    # Process input
-    inputs = processor(
-        text=prompt, audios=[(audio, samplerate)], return_tensors="pt",
-    ).to(model.device)
-
-    # Generate response
-    with torch.no_grad():
-        generate_ids = model.generate(
-            **inputs, max_new_tokens=512, generation_config=generation_config,
-        )
-        generate_ids = generate_ids[:, inputs["input_ids"].shape[1] :]
-
-    response = processor.batch_decode(
-        generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False,
-    )[0]
-    return response
+user_prompt = "<|user|>"
+assistant_prompt = "<|assistant|>"
+prompt_suffix = "<|end|>"
 
 
 def main():
@@ -110,23 +61,30 @@ def main():
     for event in node:
         if event["type"] == "INPUT":
             input_id = event["id"]
-            value = event["value"]
-
-            print(f"Received event: {input_id}, value: {value}")
-
-            # Check if it's an image URL
-            if input_id == "image_input":
-                image_response = process_image(value.as_py())  # Convert from PyArrow
-                node.send_output(
-                    output_id="image_output", data=pa.array([image_response]),
-                )
-
-            # Check if it's an audio URL
-            elif input_id == "audio_input":
-                audio_response = process_audio(value.as_py())  # Convert from PyArrow
-                node.send_output(
-                    output_id="audio_output", data=pa.array([audio_response]),
-                )
+            if input_id == "text":
+                text = event["value"][0].as_py()
+                prompt = f"{user_prompt}{text}{prompt_suffix}{assistant_prompt}"
+
+                # Process input
+                inputs = processor(
+                    text=prompt,
+                    return_tensors="pt",
+                ).to(model.device)
+                # Generate response
+                with torch.no_grad():
+                    generate_ids = model.generate(
+                        **inputs,
+                        max_new_tokens=512,
+                        generation_config=generation_config,
+                    )
+                    generate_ids = generate_ids[:, inputs["input_ids"].shape[1] :]
+
+                response = processor.batch_decode(
+                    generate_ids,
+                    skip_special_tokens=True,
+                    clean_up_tokenization_spaces=False,
+                )[0]
+                node.send_output("text", pa.array([response]))
 
 
 if __name__ == "__main__":
diff --git a/node-hub/pyarrow-assert/pyarrow_assert/main.py b/node-hub/pyarrow-assert/pyarrow_assert/main.py
index 1dd047fc..f862256d 100644
--- a/node-hub/pyarrow-assert/pyarrow_assert/main.py
+++ b/node-hub/pyarrow-assert/pyarrow_assert/main.py
@@ -7,8 +7,6 @@ import os
 import pyarrow as pa
 from dora import Node
 
-RUNNER_CI = True if os.getenv("CI") == "true" else False
-
 
 def main():
     # Handle dynamic nodes, ask for the name of the node in the dataflow, and the same values as the ENV variables.
@@ -38,11 +36,12 @@ def main():
         args.name,
     )  # provide the name to connect to the dataflow if dynamic node
 
-    data = ast.literal_eval(data)
+    try:
+        data = ast.literal_eval(data)
+    except ValueError:
+        print("Passing input as string")
 
-    if isinstance(data, list):
-        data = pa.array(data)  # initialize pyarrow array
-    elif isinstance(data, str) or isinstance(data, int) or isinstance(data, float):
+    if isinstance(data, (str, int, float)):
         data = pa.array([data])
     else:
         data = pa.array(data)  # initialize pyarrow array
diff --git a/node-hub/pyarrow-sender/pyarrow_sender/main.py b/node-hub/pyarrow-sender/pyarrow_sender/main.py
index 68ce3a92..a8f3bfd4 100644
--- a/node-hub/pyarrow-sender/pyarrow_sender/main.py
+++ b/node-hub/pyarrow-sender/pyarrow_sender/main.py
@@ -7,8 +7,6 @@ import os
 import pyarrow as pa
 from dora import Node
 
-RUNNER_CI = True if os.getenv("CI") == "true" else False
-
 
 def main():
     # Handle dynamic nodes, ask for the name of the node in the dataflow, and the same values as the ENV variables.
@@ -46,9 +44,8 @@ def main():
         data = ast.literal_eval(data)
     except ValueError:
         print("Passing input as string")
-    if isinstance(data, list):
-        data = pa.array(data)  # initialize pyarrow array
-    elif isinstance(data, str) or isinstance(data, int) or isinstance(data, float):
+
+    if isinstance(data, (str, int, float)):
         data = pa.array([data])
     else:
         data = pa.array(data)  # initialize pyarrow array
diff --git a/tests/llm/README.md b/tests/llm/README.md
new file mode 100644
index 00000000..0eb47e13
--- /dev/null
+++ b/tests/llm/README.md
@@ -0,0 +1,10 @@
+# Test an LLM on a simple prompt
+
+To run:
+
+```bash
+cd tests/llm
+uv venv --seed -p 3.11
+dora build phi4.yaml --uv
+dora run phi4.yaml --uv
+```
diff --git a/tests/llm/phi4.yaml b/tests/llm/phi4.yaml
new file mode 100644
index 00000000..3187e61d
--- /dev/null
+++ b/tests/llm/phi4.yaml
@@ -0,0 +1,24 @@
+nodes:
+  - id: pyarrow-sender
+    build: pip install -e ../../node-hub/pyarrow-sender
+    path: pyarrow-sender
+    outputs:
+      - data
+    env:
+      DATA: "'Please only generate the following output: This is a test'"
+
+  - id: dora-phi4
+    build: pip install -e ../../node-hub/dora-phi4
+    path: dora-phi4
+    inputs:
+      text: pyarrow-sender/data
+    outputs:
+      - text
+
+  - id: pyarrow-assert
+    build: pip install -e ../../node-hub/pyarrow-assert
+    path: pyarrow-assert
+    inputs:
+      data: dora-phi4/text
+    env:
+      DATA: "'This is a test'"
diff --git a/tests/llm/qwen2.5.yaml b/tests/llm/qwen2.5.yaml
new file mode 100644
index 00000000..9cff8060
--- /dev/null
+++ b/tests/llm/qwen2.5.yaml
@@ -0,0 +1,24 @@
+nodes:
+  - id: pyarrow-sender
+    build: pip install -e ../../node-hub/pyarrow-sender
+    path: pyarrow-sender
+    outputs:
+      - data
+    env:
+      DATA: "'Please only output: This is a test'"
+
+  - id: dora-qwen2.5
+    build: pip install -e ../../node-hub/dora-qwen2.5
+    path: dora-qwen2-5
+    inputs:
+      text: pyarrow-sender/data
+    outputs:
+      - text
+
+  - id: pyarrow-assert
+    build: pip install -e ../../node-hub/pyarrow-assert
+    path: pyarrow-assert
+    inputs:
+      data: dora-phi4/text
+    env:
+      DATA: "'This is a test'"