diff --git a/src/agents/pi-bundle-lsp-runtime.windows-spawn.test.ts b/src/agents/pi-bundle-lsp-runtime.windows-spawn.test.ts
index 78b90bc23ad..f5f62777651 100644
--- a/src/agents/pi-bundle-lsp-runtime.windows-spawn.test.ts
+++ b/src/agents/pi-bundle-lsp-runtime.windows-spawn.test.ts
@@ -59,12 +59,18 @@ describe("spawnLspServerProcess Windows .cmd shim handling", () => {
     });
 
     const { spawnLspServerProcess } = await import("./pi-bundle-lsp-runtime.js");
-    spawnLspServerProcess({ command: "typescript-language-server", args: ["--stdio"], env: configEnv });
+    spawnLspServerProcess({
+      command: "typescript-language-server",
+      args: ["--stdio"],
+      env: configEnv,
+    });
 
     // Must use structured params so config.env entries are not dropped
-    expect(sanitizeHostExecEnvMock).toHaveBeenCalledWith(
-      expect.objectContaining({ baseEnv: process.env, overrides: configEnv }),
-    );
+    const sanitizeParams = sanitizeHostExecEnvMock.mock.calls[0]?.[0] as
+      | { baseEnv?: NodeJS.ProcessEnv; overrides?: Record<string, string> }
+      | undefined;
+    expect(sanitizeParams?.baseEnv).toBe(process.env);
+    expect(sanitizeParams?.overrides).toBe(configEnv);
   });
 
   it("passes sanitized env to resolveWindowsSpawnProgram", async () => {
@@ -82,9 +88,11 @@ describe("spawnLspServerProcess Windows .cmd shim handling", () => {
     const { spawnLspServerProcess } = await import("./pi-bundle-lsp-runtime.js");
     spawnLspServerProcess({ command: "typescript-language-server", args: ["--stdio"] });
 
-    expect(resolveWindowsSpawnProgramMock).toHaveBeenCalledWith(
-      expect.objectContaining({ env: sanitizedEnv, allowShellFallback: true }),
-    );
+    const resolveParams = resolveWindowsSpawnProgramMock.mock.calls[0]?.[0] as
+      | { env?: Record<string, string>; allowShellFallback?: boolean }
+      | undefined;
+    expect(resolveParams?.env).toBe(sanitizedEnv);
+    expect(resolveParams?.allowShellFallback).toBe(true);
   });
 
   it("passes materialized invocation to spawn with the sanitized env", async () => {
@@ -102,10 +110,14 @@ describe("spawnLspServerProcess Windows .cmd shim handling", () => {
     const { spawnLspServerProcess } = await import("./pi-bundle-lsp-runtime.js");
     spawnLspServerProcess({ command: "typescript-language-server", args: ["--stdio"] });
 
-    expect(spawnMock).toHaveBeenCalledWith(
-      "cmd.exe",
-      ["/c", "typescript-language-server.cmd", "--stdio"],
-      expect.objectContaining({ env: sanitizedEnv, shell: true, windowsHide: true }),
-    );
+    const spawnCall = spawnMock.mock.calls[0];
+    expect(spawnCall?.[0]).toBe("cmd.exe");
+    expect(spawnCall?.[1]).toEqual(["/c", "typescript-language-server.cmd", "--stdio"]);
+    const spawnOptions = spawnCall?.[2] as
+      | { env?: Record<string, string>; shell?: boolean; windowsHide?: boolean }
+      | undefined;
+    expect(spawnOptions?.env).toBe(sanitizedEnv);
+    expect(spawnOptions?.shell).toBe(true);
+    expect(spawnOptions?.windowsHide).toBe(true);
   });
 });