diff --git a/src/image-generation/provider-registry.test.ts b/src/image-generation/provider-registry.test.ts
index 65ea49b1b05..8ca5e397c33 100644
--- a/src/image-generation/provider-registry.test.ts
+++ b/src/image-generation/provider-registry.test.ts
@@ -1,4 +1,4 @@
-import { afterEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { createEmptyPluginRegistry } from "../plugins/registry.js";
 import { resetPluginRuntimeStateForTest, setActivePluginRegistry } from "../plugins/runtime.js";
 
@@ -10,7 +10,8 @@ vi.mock("../plugins/loader.js", () => ({
   loadOpenClawPlugins: loadOpenClawPluginsMock,
 }));
 
-import { getImageGenerationProvider, listImageGenerationProviders } from "./provider-registry.js";
+let getImageGenerationProvider: typeof import("./provider-registry.js").getImageGenerationProvider;
+let listImageGenerationProviders: typeof import("./provider-registry.js").listImageGenerationProviders;
 
 describe("image-generation provider registry", () => {
   afterEach(() => {
@@ -19,6 +20,13 @@ describe("image-generation provider registry", () => {
     resetPluginRuntimeStateForTest();
   });
 
+  beforeEach(async () => {
+    vi.resetModules();
+    ({ getImageGenerationProvider, listImageGenerationProviders } = await import(
+      "./provider-registry.js"
+    ));
+  });
+
   it("does not load plugins when listing without config", () => {
     expect(listImageGenerationProviders()).toEqual([]);
     expect(loadOpenClawPluginsMock).not.toHaveBeenCalled();
diff --git a/src/image-generation/provider-registry.ts b/src/image-generation/provider-registry.ts
index cf6b5c2d874..83696445933 100644
--- a/src/image-generation/provider-registry.ts
+++ b/src/image-generation/provider-registry.ts
@@ -1,5 +1,6 @@
 import { normalizeProviderId } from "../agents/model-selection.js";
 import type { OpenClawConfig } from "../config/config.js";
+import { isBlockedObjectKey } from "../infra/prototype-keys.js";
 import { loadOpenClawPlugins } from "../plugins/loader.js";
 import { getActivePluginRegistry, getActivePluginRegistryKey } from "../plugins/runtime.js";
 import type { ImageGenerationProviderPlugin } from "../plugins/types.js";
@@ -9,7 +10,10 @@ const UNSAFE_PROVIDER_IDS = new Set(["__proto__", "constructor", "prototype"]);
 
 function normalizeImageGenerationProviderId(id: string | undefined): string | undefined {
   const normalized = normalizeProviderId(id ?? "");
-  return normalized || undefined;
+  if (!normalized || isBlockedObjectKey(normalized)) {
+    return undefined;
+  }
+  return normalized;
 }
 
 function isSafeImageGenerationProviderId(id: string | undefined): id is string {
diff --git a/src/image-generation/runtime.test.ts b/src/image-generation/runtime.test.ts
index 91780260152..4cb1d62182d 100644
--- a/src/image-generation/runtime.test.ts
+++ b/src/image-generation/runtime.test.ts
@@ -1,14 +1,22 @@
-import { afterEach, describe, expect, it } from "vitest";
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
 import type { OpenClawConfig } from "../config/config.js";
 import { createEmptyPluginRegistry } from "../plugins/registry.js";
 import { setActivePluginRegistry } from "../plugins/runtime.js";
-import { generateImage, listRuntimeImageGenerationProviders } from "./runtime.js";
+import { vi } from "vitest";
+
+let generateImage: typeof import("./runtime.js").generateImage;
+let listRuntimeImageGenerationProviders: typeof import("./runtime.js").listRuntimeImageGenerationProviders;
 
 describe("image-generation runtime helpers", () => {
   afterEach(() => {
     setActivePluginRegistry(createEmptyPluginRegistry());
   });
 
+  beforeEach(async () => {
+    vi.resetModules();
+    ({ generateImage, listRuntimeImageGenerationProviders } = await import("./runtime.js"));
+  });
+
   it("generates images through the active image-generation registry", async () => {
     const pluginRegistry = createEmptyPluginRegistry();
     const authStore = { version: 1, profiles: {} } as const;
diff --git a/src/media-understanding/image.test.ts b/src/media-understanding/image.test.ts
index 893d1577560..5a93e7b59cf 100644
--- a/src/media-understanding/image.test.ts
+++ b/src/media-understanding/image.test.ts
@@ -29,6 +29,39 @@ const {
   discoverModelsMock,
 } = hoisted;
 
+vi.mock("@mariozechner/pi-ai", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("@mariozechner/pi-ai")>();
+  return {
+    ...actual,
+    complete: completeMock,
+  };
+});
+
+vi.mock("../agents/minimax-vlm.js", () => ({
+  isMinimaxVlmProvider: (provider: string) =>
+    provider === "minimax" || provider === "minimax-portal",
+  isMinimaxVlmModel: (provider: string, modelId: string) =>
+    (provider === "minimax" || provider === "minimax-portal") && modelId === "MiniMax-VL-01",
+  minimaxUnderstandImage: minimaxUnderstandImageMock,
+}));
+
+vi.mock("../agents/models-config.js", () => ({
+  ensureOpenClawModelsJson: ensureOpenClawModelsJsonMock,
+}));
+
+vi.mock("../agents/model-auth.js", () => ({
+  getApiKeyForModel: getApiKeyForModelMock,
+  resolveApiKeyForProvider: resolveApiKeyForProviderMock,
+  requireApiKey: requireApiKeyMock,
+}));
+
+vi.mock("../agents/pi-model-discovery-runtime.js", () => ({
+  discoverAuthStorage: () => ({
+    setRuntimeApiKey: setRuntimeApiKeyMock,
+  }),
+  discoverModels: discoverModelsMock,
+}));
+
 let describeImageWithModel: typeof import("./image.js").describeImageWithModel;
 
 describe("describeImageWithModel", () => {
diff --git a/src/media-understanding/runner.vision-skip.test.ts b/src/media-understanding/runner.vision-skip.test.ts
index 28b30683df8..df380571139 100644
--- a/src/media-understanding/runner.vision-skip.test.ts
+++ b/src/media-understanding/runner.vision-skip.test.ts
@@ -2,11 +2,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 import type { MsgContext } from "../auto-reply/templating.js";
 import type { OpenClawConfig } from "../config/config.js";
 
-let buildProviderRegistry: typeof import("./runner.js").buildProviderRegistry;
-let createMediaAttachmentCache: typeof import("./runner.js").createMediaAttachmentCache;
-let normalizeMediaAttachments: typeof import("./runner.js").normalizeMediaAttachments;
-let runCapability: typeof import("./runner.js").runCapability;
-
 const catalog = [
   {
     id: "gpt-4.1",
@@ -28,6 +23,11 @@ vi.mock("../agents/model-catalog.js", async () => {
   };
 });
 
+let buildProviderRegistry: typeof import("./runner.js").buildProviderRegistry;
+let createMediaAttachmentCache: typeof import("./runner.js").createMediaAttachmentCache;
+let normalizeMediaAttachments: typeof import("./runner.js").normalizeMediaAttachments;
+let runCapability: typeof import("./runner.js").runCapability;
+
 describe("runCapability image skip", () => {
   beforeEach(async () => {
     vi.resetModules();
diff --git a/src/tts/tts.test.ts b/src/tts/tts.test.ts
index dcc8ece9818..18987eb87f5 100644
--- a/src/tts/tts.test.ts
+++ b/src/tts/tts.test.ts
@@ -1,17 +1,16 @@
-import { completeSimple, type AssistantMessage } from "@mariozechner/pi-ai";
+import type { AssistantMessage } from "@mariozechner/pi-ai";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import { buildElevenLabsSpeechProvider } from "../../extensions/elevenlabs/speech-provider.ts";
 import { buildMicrosoftSpeechProvider } from "../../extensions/microsoft/speech-provider.ts";
 import { buildOpenAISpeechProvider } from "../../extensions/openai/speech-provider.ts";
-import { ensureCustomApiRegistered } from "../agents/custom-api-registry.js";
-import { getApiKeyForModel } from "../agents/model-auth.js";
-import { resolveModelAsync } from "../agents/pi-embedded-runner/model.js";
 import type { OpenClawConfig } from "../config/config.js";
 import { createEmptyPluginRegistry } from "../plugins/registry-empty.js";
 import { setActivePluginRegistry } from "../plugins/runtime.js";
 import { withEnv } from "../test-utils/env.js";
 import * as tts from "./tts.js";
 
+let completeSimple: typeof import("@mariozechner/pi-ai").completeSimple;
+
 vi.mock("@mariozechner/pi-ai", async (importOriginal) => {
   const original = await importOriginal<typeof import("@mariozechner/pi-ai")>();
   return {
@@ -128,7 +127,8 @@ function createOpenAiTelephonyCfg(model: "tts-1" | "gpt-4o-mini-tts"): OpenClawC
 }
 
 describe("tts", () => {
-  beforeEach(() => {
+  beforeEach(async () => {
+    ({ completeSimple } = await import("@mariozechner/pi-ai"));
     const registry = createEmptyPluginRegistry();
     registry.speechProviders = [
       { pluginId: "openai", provider: buildOpenAISpeechProvider(), source: "test" },
@@ -391,10 +391,10 @@ describe("tts", () => {
   describe("summarizeText", () => {
     let summarizeTextForTest: typeof summarizeText;
     let resolveTtsConfigForTest: typeof resolveTtsConfig;
-    let completeSimpleForTest: typeof completeSimple;
-    let getApiKeyForModelForTest: typeof getApiKeyForModel;
-    let resolveModelAsyncForTest: typeof resolveModelAsync;
-    let ensureCustomApiRegisteredForTest: typeof ensureCustomApiRegistered;
+    let completeSimpleForTest: typeof import("@mariozechner/pi-ai").completeSimple;
+    let getApiKeyForModelForTest: typeof import("../agents/model-auth.js").getApiKeyForModel;
+    let resolveModelAsyncForTest: typeof import("../agents/pi-embedded-runner/model.js").resolveModelAsync;
+    let ensureCustomApiRegisteredForTest: typeof import("../agents/custom-api-registry.js").ensureCustomApiRegistered;
 
     const baseCfg: OpenClawConfig = {
       agents: { defaults: { model: { primary: "openai/gpt-4o-mini" } } },