test: move ollama api_base precedence tests to tests/test_litellm/llms/ollama/

Per @krrish-berri-2 review: tests belong under `tests/test_litellm/`, which
has a dedicated `llms/ollama/` directory with other ollama test modules.

- NEW: tests/test_litellm/llms/ollama/test_ollama_api_base_precedence.py
  (all three tests — completion, embedding, aembedding — with the same
  mock/monkeypatch setup)
- REMOVED: the three functions from tests/local_testing/test_completion.py
  (leaving the rest of that file untouched)

tests/local_testing/test_completion.py

@@ -1323,52 +1323,6 @@ def test_lm_studio_completion(monkeypatch):
         print(e)
 
 
-@pytest.mark.parametrize("model", ["ollama/phi", "ollama_chat/phi"])
-def test_ollama_completion_explicit_api_base_takes_precedence(monkeypatch, model):
-    monkeypatch.setattr(litellm, "api_base", "https://api.deepseek.com")
-
-    with patch("litellm.main.base_llm_http_handler.completion") as mock_completion:
-        mock_completion.return_value = MagicMock()
-
-        litellm.completion(
-            model=model,
-            messages=[{"role": "user", "content": "Hello"}],
-            api_base="http://localhost:11434",
-        )
-
-        assert mock_completion.call_args.kwargs["api_base"] == "http://localhost:11434"
-
-
-def test_ollama_embedding_explicit_api_base_takes_precedence(monkeypatch):
-    monkeypatch.setattr(litellm, "api_base", "https://api.deepseek.com")
-
-    with patch("litellm.main.ollama.ollama_embeddings") as mock_embeddings:
-        mock_embeddings.return_value = MagicMock()
-
-        litellm.embedding(
-            model="ollama/qwen3-embedding:0.6b",
-            input="hello",
-            api_base="http://localhost:11434",
-        )
-
-        assert mock_embeddings.call_args.kwargs["api_base"] == "http://localhost:11434"
-
-
-@pytest.mark.asyncio
-async def test_ollama_aembedding_explicit_api_base_takes_precedence(monkeypatch):
-    monkeypatch.setattr(litellm, "api_base", "https://api.deepseek.com")
-
-    with patch("litellm.main.ollama.ollama_aembeddings") as mock_aembeddings:
-        mock_aembeddings.return_value = MagicMock()
-
-        await litellm.aembedding(
-            model="ollama/qwen3-embedding:0.6b",
-            input="hello",
-            api_base="http://localhost:11434",
-        )
-
-        assert mock_aembeddings.call_args.kwargs["api_base"] == "http://localhost:11434"
-
 
 # ################### Hugging Face Conversational models ########################
 # def hf_test_completion_conv():

tests/test_litellm/llms/ollama/test_ollama_api_base_precedence.py

@@ -0,0 +1,62 @@
+"""Regression tests for ollama `api_base` precedence.
+
+Explicit `api_base` kwargs must override `litellm.api_base` global, across:
+  - ollama / ollama_chat completion
+  - ollama embedding (sync)
+  - ollama aembedding (async)
+
+Fixes the precedence bug in `litellm.main` where `litellm.api_base or api_base`
+swallowed explicit kwargs whenever the global was set.
+"""
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+import litellm
+
+
+@pytest.mark.parametrize("model", ["ollama/phi", "ollama_chat/phi"])
+def test_ollama_completion_explicit_api_base_takes_precedence(monkeypatch, model):
+    monkeypatch.setattr(litellm, "api_base", "https://api.deepseek.com")
+
+    with patch("litellm.main.base_llm_http_handler.completion") as mock_completion:
+        mock_completion.return_value = MagicMock()
+
+        litellm.completion(
+            model=model,
+            messages=[{"role": "user", "content": "Hello"}],
+            api_base="http://localhost:11434",
+        )
+
+        assert mock_completion.call_args.kwargs["api_base"] == "http://localhost:11434"
+
+
+def test_ollama_embedding_explicit_api_base_takes_precedence(monkeypatch):
+    monkeypatch.setattr(litellm, "api_base", "https://api.deepseek.com")
+
+    with patch("litellm.main.ollama.ollama_embeddings") as mock_embeddings:
+        mock_embeddings.return_value = MagicMock()
+
+        litellm.embedding(
+            model="ollama/qwen3-embedding:0.6b",
+            input="hello",
+            api_base="http://localhost:11434",
+        )
+
+        assert mock_embeddings.call_args.kwargs["api_base"] == "http://localhost:11434"
+
+
+@pytest.mark.asyncio
+async def test_ollama_aembedding_explicit_api_base_takes_precedence(monkeypatch):
+    monkeypatch.setattr(litellm, "api_base", "https://api.deepseek.com")
+
+    with patch("litellm.main.ollama.ollama_aembeddings") as mock_aembeddings:
+        mock_aembeddings.return_value = MagicMock()
+
+        await litellm.aembedding(
+            model="ollama/qwen3-embedding:0.6b",
+            input="hello",
+            api_base="http://localhost:11434",
+        )
+
+        assert mock_aembeddings.call_args.kwargs["api_base"] == "http://localhost:11434"