diff --git a/src/providers/google-shared.ensures-function-call-comes-after-user-turn.test.ts b/src/providers/google-shared.ensures-function-call-comes-after-user-turn.test.ts
index f3ecc5d34e7..e3b61c011e0 100644
--- a/src/providers/google-shared.ensures-function-call-comes-after-user-turn.test.ts
+++ b/src/providers/google-shared.ensures-function-call-comes-after-user-turn.test.ts
@@ -1,41 +1,7 @@
-import type { Context, Model } from "@mariozechner/pi-ai/dist/types.js";
+import type { Context } from "@mariozechner/pi-ai/dist/types.js";
 import { convertMessages } from "@mariozechner/pi-ai/dist/providers/google-shared.js";
 import { describe, expect, it } from "vitest";
-
-const asRecord = (value: unknown): Record<string, unknown> => {
-  expect(value).toBeTruthy();
-  expect(typeof value).toBe("object");
-  expect(Array.isArray(value)).toBe(false);
-  return value as Record<string, unknown>;
-};
-
-const makeModel = (id: string): Model<"google-generative-ai"> =>
-  ({
-    id,
-    name: id,
-    api: "google-generative-ai",
-    provider: "google",
-    baseUrl: "https://example.invalid",
-    reasoning: false,
-    input: ["text"],
-    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
-    contextWindow: 1,
-    maxTokens: 1,
-  }) as Model<"google-generative-ai">;
-
-const makeGeminiCliModel = (id: string): Model<"google-gemini-cli"> =>
-  ({
-    id,
-    name: id,
-    api: "google-gemini-cli",
-    provider: "google-gemini-cli",
-    baseUrl: "https://example.invalid",
-    reasoning: false,
-    input: ["text"],
-    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
-    contextWindow: 1,
-    maxTokens: 1,
-  }) as Model<"google-gemini-cli">;
+import { asRecord, makeGeminiCliModel, makeModel } from "./google-shared.test-helpers.js";
 
 describe("google-shared convertTools", () => {
   it("ensures function call comes after user turn, not after model turn", () => {
diff --git a/src/providers/google-shared.preserves-parameters-type-is-missing.test.ts b/src/providers/google-shared.preserves-parameters-type-is-missing.test.ts
index a32053fd0e5..e125f8bbe2f 100644
--- a/src/providers/google-shared.preserves-parameters-type-is-missing.test.ts
+++ b/src/providers/google-shared.preserves-parameters-type-is-missing.test.ts
@@ -1,48 +1,7 @@
-import type { Context, Model, Tool } from "@mariozechner/pi-ai/dist/types.js";
+import type { Context, Tool } from "@mariozechner/pi-ai/dist/types.js";
 import { convertMessages, convertTools } from "@mariozechner/pi-ai/dist/providers/google-shared.js";
 import { describe, expect, it } from "vitest";
-
-const asRecord = (value: unknown): Record<string, unknown> => {
-  expect(value).toBeTruthy();
-  expect(typeof value).toBe("object");
-  expect(Array.isArray(value)).toBe(false);
-  return value as Record<string, unknown>;
-};
-
-const getFirstToolParameters = (
-  converted: ReturnType<typeof convertTools>,
-): Record<string, unknown> => {
-  const functionDeclaration = asRecord(converted?.[0]?.functionDeclarations?.[0]);
-  return asRecord(functionDeclaration.parametersJsonSchema ?? functionDeclaration.parameters);
-};
-
-const makeModel = (id: string): Model<"google-generative-ai"> =>
-  ({
-    id,
-    name: id,
-    api: "google-generative-ai",
-    provider: "google",
-    baseUrl: "https://example.invalid",
-    reasoning: false,
-    input: ["text"],
-    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
-    contextWindow: 1,
-    maxTokens: 1,
-  }) as Model<"google-generative-ai">;
-
-const _makeGeminiCliModel = (id: string): Model<"google-gemini-cli"> =>
-  ({
-    id,
-    name: id,
-    api: "google-gemini-cli",
-    provider: "google-gemini-cli",
-    baseUrl: "https://example.invalid",
-    reasoning: false,
-    input: ["text"],
-    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
-    contextWindow: 1,
-    maxTokens: 1,
-  }) as Model<"google-gemini-cli">;
+import { asRecord, getFirstToolParameters, makeModel } from "./google-shared.test-helpers.js";
 
 describe("google-shared convertTools", () => {
   it("preserves parameters when type is missing", () => {
diff --git a/src/providers/google-shared.test-helpers.ts b/src/providers/google-shared.test-helpers.ts
new file mode 100644
index 00000000000..8d1e7f4e432
--- /dev/null
+++ b/src/providers/google-shared.test-helpers.ts
@@ -0,0 +1,49 @@
+import type { Model } from "@mariozechner/pi-ai/dist/types.js";
+import { expect } from "vitest";
+
+export const asRecord = (value: unknown): Record<string, unknown> => {
+  expect(value).toBeTruthy();
+  expect(typeof value).toBe("object");
+  expect(Array.isArray(value)).toBe(false);
+  return value as Record<string, unknown>;
+};
+
+type ConvertedTools = ReadonlyArray<{
+  functionDeclarations?: ReadonlyArray<{
+    parametersJsonSchema?: unknown;
+    parameters?: unknown;
+  }>;
+}>;
+
+export const getFirstToolParameters = (converted: ConvertedTools): Record<string, unknown> => {
+  const functionDeclaration = asRecord(converted?.[0]?.functionDeclarations?.[0]);
+  return asRecord(functionDeclaration.parametersJsonSchema ?? functionDeclaration.parameters);
+};
+
+export const makeModel = (id: string): Model<"google-generative-ai"> =>
+  ({
+    id,
+    name: id,
+    api: "google-generative-ai",
+    provider: "google",
+    baseUrl: "https://example.invalid",
+    reasoning: false,
+    input: ["text"],
+    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
+    contextWindow: 1,
+    maxTokens: 1,
+  }) as Model<"google-generative-ai">;
+
+export const makeGeminiCliModel = (id: string): Model<"google-gemini-cli"> =>
+  ({
+    id,
+    name: id,
+    api: "google-gemini-cli",
+    provider: "google-gemini-cli",
+    baseUrl: "https://example.invalid",
+    reasoning: false,
+    input: ["text"],
+    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
+    contextWindow: 1,
+    maxTokens: 1,
+  }) as Model<"google-gemini-cli">;