diff --git a/src/resources/extensions/ollama/ollama-auth-mode.test.ts b/src/resources/extensions/ollama/ollama-auth-mode.test.ts
new file mode 100644
index 000000000..e74f2e76c
--- /dev/null
+++ b/src/resources/extensions/ollama/ollama-auth-mode.test.ts
@@ -0,0 +1,20 @@
+/**
+ * Regression test for #3440: Ollama extension must register with
+ * authMode "apiKey" (not "none") to avoid streamSimple requirement.
+ */
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { join, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+test("Ollama registers with authMode apiKey, not none (#3440)", () => {
+  const src = readFileSync(join(__dirname, "index.ts"), "utf-8");
+  // Find the registerProvider call
+  const registerBlock = src.slice(src.indexOf("pi.registerProvider(\"ollama\""));
+  const authLine = registerBlock.match(/authMode:\s*"(\w+)"/);
+  assert.ok(authLine, "registerProvider must specify authMode");
+  assert.equal(authLine![1], "apiKey", "authMode must be apiKey, not none");
+});