diff --git a/packages/ai/src/transports/openai-completions-compat.ts b/packages/ai/src/transports/openai-completions-compat.ts
index b80d5578d93e..e607f5dc3b67 100644
--- a/packages/ai/src/transports/openai-completions-compat.ts
+++ b/packages/ai/src/transports/openai-completions-compat.ts
@@ -283,9 +283,3 @@ export function resolveOpenAICompletionsCompat(
     requiresNonEmptyUserOrAssistantMessage: defaults.requiresNonEmptyUserOrAssistantMessage,
   };
 }
-
-if (process.env.VITEST || process.env.NODE_ENV === "test") {
-  (globalThis as Record<PropertyKey, unknown>)[
-    Symbol.for("openclaw.openAICompletionsCompatTestApi")
-  ] = { resolveOpenAICompletionsCompatDefaults };
-}
diff --git a/src/agents/openai-completions-compat.test-support.ts b/src/agents/openai-completions-compat.test-support.ts
deleted file mode 100644
index 7d2a906d3912..000000000000
--- a/src/agents/openai-completions-compat.test-support.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-import type { detectOpenAICompletionsCompat } from "@openclaw/ai/transports";
-import type { ProviderEndpointClass } from "./provider-attribution.js";
-import "@openclaw/ai/transports";
-
-type OpenAICompletionsCompatDefaultsInput = {
-  provider?: string;
-  endpointClass: ProviderEndpointClass;
-  knownProviderFamily: string;
-  supportsNativeStreamingUsageCompat?: boolean;
-  supportsOpenAICompletionsStreamingUsageCompat?: boolean;
-  usesExplicitProxyLikeEndpoint?: boolean;
-};
-
-type OpenAICompletionsCompatDefaults = ReturnType<typeof detectOpenAICompletionsCompat>["defaults"];
-
-type OpenAICompletionsCompatTestApi = {
-  resolveOpenAICompletionsCompatDefaults(
-    input: OpenAICompletionsCompatDefaultsInput,
-  ): OpenAICompletionsCompatDefaults;
-};
-
-function getTestApi(): OpenAICompletionsCompatTestApi {
-  const api = (globalThis as Record<PropertyKey, unknown>)[
-    Symbol.for("openclaw.openAICompletionsCompatTestApi")
-  ];
-  if (!api) {
-    throw new Error("OpenAI completions compat test API is unavailable");
-  }
-  return api as OpenAICompletionsCompatTestApi;
-}
-
-export function resolveOpenAICompletionsCompatDefaults(
-  input: OpenAICompletionsCompatDefaultsInput,
-): OpenAICompletionsCompatDefaults {
-  return getTestApi().resolveOpenAICompletionsCompatDefaults(input);
-}
diff --git a/src/agents/openai-completions-compat.test.ts b/src/agents/openai-completions-compat.test.ts
deleted file mode 100644
index 89e3df10b58a..000000000000
--- a/src/agents/openai-completions-compat.test.ts
+++ /dev/null
@@ -1,180 +0,0 @@
-import { detectOpenAICompletionsCompat } from "@openclaw/ai/transports";
-// Verifies OpenAI-compatible endpoint defaults for streaming usage and reasoning payloads.
-import { describe, expect, it } from "vitest";
-import { resolveOpenAICompletionsCompatDefaults } from "./openai-completions-compat.test-support.js";
-
-describe("resolveOpenAICompletionsCompatDefaults", () => {
-  it("keeps streaming usage enabled for provider-declared compatible endpoints", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "custom-local",
-        endpointClass: "local",
-        knownProviderFamily: "custom-local",
-        supportsNativeStreamingUsageCompat: true,
-      }).supportsUsageInStreaming,
-    ).toBe(true);
-  });
-
-  it("keeps streaming usage enabled for custom provider-declared compatible endpoints", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "custom-local",
-        endpointClass: "custom",
-        knownProviderFamily: "custom-local",
-        supportsNativeStreamingUsageCompat: true,
-      }).supportsUsageInStreaming,
-    ).toBe(true);
-  });
-
-  it("keeps streaming usage enabled for local OpenAI-compatible endpoints", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "llama-cpp",
-        endpointClass: "local",
-        knownProviderFamily: "llama-cpp",
-      }).supportsUsageInStreaming,
-    ).toBe(true);
-  });
-
-  it("does not broaden streaming usage for generic custom providers", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "custom-cpa",
-        endpointClass: "custom",
-        knownProviderFamily: "custom-cpa",
-      }).supportsUsageInStreaming,
-    ).toBe(false);
-  });
-
-  it.each(["vllm", "sglang", "lmstudio"])(
-    "enables streaming usage compat for manifest-declared local provider %s",
-    (provider) => {
-      // Manifest capability, not provider id alone, enables local streaming usage compat.
-      expect(
-        resolveOpenAICompletionsCompatDefaults({
-          provider,
-          endpointClass: "custom",
-          knownProviderFamily: provider,
-          supportsOpenAICompletionsStreamingUsageCompat: true,
-        }).supportsUsageInStreaming,
-      ).toBe(true);
-    },
-  );
-
-  it("does not infer local streaming usage from provider id alone", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "vllm",
-        endpointClass: "custom",
-        knownProviderFamily: "vllm",
-      }).supportsUsageInStreaming,
-    ).toBe(false);
-  });
-
-  it("uses Together reasoning payload format for Together-family providers", () => {
-    const defaults = resolveOpenAICompletionsCompatDefaults({
-      provider: "together",
-      endpointClass: "custom",
-      knownProviderFamily: "together",
-    });
-
-    expect(defaults.thinkingFormat).toBe("together");
-    expect(defaults.supportsReasoningEffort).toBe(false);
-    expect(defaults.maxTokensField).toBe("max_tokens");
-  });
-
-  it("uses Z.AI's documented max_tokens field", () => {
-    const defaults = resolveOpenAICompletionsCompatDefaults({
-      provider: "zai",
-      endpointClass: "zai-native",
-      knownProviderFamily: "zai",
-    });
-
-    expect(defaults.maxTokensField).toBe("max_tokens");
-  });
-
-  it("requires a non-empty user or assistant turn for ModelStudio-compatible providers", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "qwen",
-        endpointClass: "modelstudio-native",
-        knownProviderFamily: "modelstudio",
-      }).requiresNonEmptyUserOrAssistantMessage,
-    ).toBe(true);
-  });
-
-  it("does not require a non-empty user or assistant turn for generic local endpoints", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "vllm",
-        endpointClass: "local",
-        knownProviderFamily: "vllm",
-      }).requiresNonEmptyUserOrAssistantMessage,
-    ).toBe(false);
-  });
-});
-
-describe("detectOpenAICompletionsCompat", () => {
-  it("enables streaming usage compat for vLLM on a local OpenAI-compatible endpoint", () => {
-    const detected = detectOpenAICompletionsCompat({
-      provider: "vllm",
-      baseUrl: "http://127.0.0.1:8000/v1",
-      id: "Qwen/Qwen3-Coder-Next-FP8",
-    });
-
-    expect(detected.defaults.supportsUsageInStreaming).toBe(true);
-  });
-});
-
-describe("xiaomi compat detection", () => {
-  it("sets thinkingFormat to deepseek for xiaomi-native endpoint", () => {
-    // Xiaomi's OpenAI-compatible route uses DeepSeek-style reasoning payloads.
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "xiaomi",
-        endpointClass: "xiaomi-native",
-        knownProviderFamily: "xiaomi",
-      }).thinkingFormat,
-    ).toBe("deepseek");
-  });
-
-  it("sets requiresReasoningContentOnAssistantMessages for xiaomi-native endpoint", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "xiaomi",
-        endpointClass: "xiaomi-native",
-        knownProviderFamily: "xiaomi",
-      }).requiresReasoningContentOnAssistantMessages,
-    ).toBe(true);
-  });
-
-  it("sets thinkingFormat to deepseek for default-route xiaomi provider", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "xiaomi",
-        endpointClass: "default",
-        knownProviderFamily: "xiaomi",
-      }).thinkingFormat,
-    ).toBe("deepseek");
-  });
-
-  it("sets requiresReasoningContentOnAssistantMessages for default-route xiaomi provider", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "xiaomi",
-        endpointClass: "default",
-        knownProviderFamily: "xiaomi",
-      }).requiresReasoningContentOnAssistantMessages,
-    ).toBe(true);
-  });
-
-  it("does not set requiresReasoningContentOnAssistantMessages for unrelated custom provider", () => {
-    expect(
-      resolveOpenAICompletionsCompatDefaults({
-        provider: "other-provider",
-        endpointClass: "custom",
-        knownProviderFamily: "other-provider",
-      }).requiresReasoningContentOnAssistantMessages,
-    ).toBe(false);
-  });
-});