diff --git a/packages/adapter-utils/src/execution-target.test.ts b/packages/adapter-utils/src/execution-target.test.ts
index 88919a99f3..46a4df7d6d 100644
--- a/packages/adapter-utils/src/execution-target.test.ts
+++ b/packages/adapter-utils/src/execution-target.test.ts
@@ -5,9 +5,6 @@ import * as ssh from "./ssh.js";
 import * as serverUtils from "./server-utils.js";
 import {
   cleanupGitHubOperationLaunchers,
-  adapterExecutionTargetRuntimeRoot,
-  prepareAdapterExecutionTargetRuntime,
-  type AdapterComputerExecutionTarget,
   prepareGitHubOperationLaunchers,
   adapterExecutionTargetUsesManagedHome,
   ensureAdapterExecutionTargetRuntimeCommandInstalled,
@@ -440,36 +437,3 @@ describe("GitHub launcher lifecycle", () => {
     expect(runner.execute).toHaveBeenCalledTimes(1);
   });
 });
-
-
-describe("computer legacy runtime ownership", () => {
-  it.each(["claude", "codex"])("isolates %s assets and callback roots for owners sharing a checkout", async adapterKey => {
-    const execute = vi.fn(async () => ({ exitCode: 0, signal: null, timedOut: false, stdout: "", stderr: "", pid: 123, startedAt: "2026-10-10T00:00:00Z" }));
-    const target = (ownerId: string, generation = 1) => ({
-      kind: "remote", transport: "computer", providerKey: "boat", environmentId: "environment",
-      leaseId: ownerId, remoteCwd: "/shared/project", listenerPort: 43127,
-      runner: { execute }, processRunner: { execute },
-      resourceAuthority: { kind: "computer-owner", computerId: "computer", ownerId, generation },
-      fileAuthority: { kind: "remote-persistent", placementId: "shared", root: "/shared/project", agentHome: `/homes/${ownerId}` },
-      launch: vi.fn(), inspectProcess: vi.fn(), retainWarm: vi.fn(), retire: vi.fn(),
-      computerTool: { command: "cua-driver", args: ["mcp"] },
-    } satisfies AdapterComputerExecutionTarget);
-    const prepare = (owner: AdapterComputerExecutionTarget) => prepareAdapterExecutionTargetRuntime({
-      target: owner, runId: owner.leaseId!, adapterKey, workspaceLocalDir: "/unused-local-workspace", syncWorkspace: false,
-    });
-    const first = await prepare(target("agent-one"));
-    const second = await prepare(target("agent-two"));
-    expect(first.workspaceRemoteDir).toBe("/shared/project");
-    expect(second.workspaceRemoteDir).toBe(first.workspaceRemoteDir);
-    expect(first.runtimeRootDir).toBe(adapterExecutionTargetRuntimeRoot(target("agent-one"), adapterKey));
-    expect(second.runtimeRootDir).not.toBe(first.runtimeRootDir);
-    expect(adapterExecutionTargetRuntimeRoot(target("agent-one", 2), adapterKey)).not.toBe(first.runtimeRootDir);
-    expect((await prepare(target("agent-one"))).runtimeRootDir).toBe(first.runtimeRootDir);
-    expect(first.runtimeRootDir).toMatch(new RegExp(`^/shared/project/\\.paperclip-runtime/${adapterKey}/owners/[a-f0-9]{64}$`));
-  });
-
-  it("preserves the existing sandbox runtime root", () => {
-    const target = { kind: "remote", transport: "sandbox", remoteCwd: "/workspace" } as const;
-    expect(adapterExecutionTargetRuntimeRoot(target, "claude")).toBe("/workspace/.paperclip-runtime/claude");
-  });
-});