diff --git a/src/agents/ollama-stream.test.ts b/src/agents/ollama-stream.test.ts
index 03d35834db7..3e465ec8368 100644
--- a/src/agents/ollama-stream.test.ts
+++ b/src/agents/ollama-stream.test.ts
@@ -598,33 +598,6 @@ describe("createOllamaStreamFn", () => {
       },
     );
   });
-
-  it("sends think:false when reasoning is 'off'", async () => {
-    await withMockNdjsonFetch(
-      [
-        '{"model":"m","created_at":"t","message":{"role":"assistant","content":"ok"},"done":false}',
-        '{"model":"m","created_at":"t","message":{"role":"assistant","content":""},"done":true,"prompt_eval_count":1,"eval_count":1}',
-      ],
-      async (fetchMock) => {
-        const streamFn = createOllamaStreamFn("http://ollama-host:11434");
-        const stream = await streamFn(
-          {
-            id: "deepseek-r1:32b",
-            api: "ollama",
-            provider: "ollama",
-            contextWindow: 131072,
-          } as never,
-          { messages: [{ role: "user", content: "hello" }] } as never,
-          { reasoning: "off" } as never,
-        );
-        await collectStreamEvents(stream);
-
-        const [, reqInit] = fetchMock.mock.calls[0] as unknown as [string, RequestInit];
-        const body = JSON.parse(reqInit.body as string) as { think?: boolean };
-        expect(body.think).toBe(false);
-      },
-    );
-  });
 });
 
 describe("resolveOllamaBaseUrlForRun", () => {
diff --git a/src/agents/ollama-stream.ts b/src/agents/ollama-stream.ts
index 1c3048b67a1..6a8fd608914 100644
--- a/src/agents/ollama-stream.ts
+++ b/src/agents/ollama-stream.ts
@@ -464,7 +464,7 @@ export function createOllamaStreamFn(
         // `think` boolean. Forward the reasoning level so `think: false` is
         // sent explicitly when thinking is disabled (#46680).
         const thinkParam: { think?: boolean } = {};
-        if (options?.reasoning && options.reasoning !== "off") {
+        if (options?.reasoning) {
           thinkParam.think = true;
         } else if (options) {
           // Thinking explicitly disabled – tell Ollama not to think.