diff --git a/tests/runner-e2e/chat-private-inputs.test.ts b/tests/runner-e2e/chat-private-inputs.test.ts
index fc118eab2d6..9f47edcd7e7 100644
--- a/tests/runner-e2e/chat-private-inputs.test.ts
+++ b/tests/runner-e2e/chat-private-inputs.test.ts
@@ -70,7 +70,7 @@ it("rejects undeclared runtime scenarios and fields before resolving or writing
 it("resolves only the finite SSH private key reference and refuses an alternate ambient name", () => {
   const root = fixture(), configFile = path.join(root, "ssh.json"); const scenarioId = "execution-environments.test-computer"; const spec = runtimePrivateRequirements[scenarioId];
   const descriptor = { scenarioId, externalInput: { provider: spec.provider, fields: spec.fields }, requiredCredentials: spec.credentials };
-  const prerequisites = { hostname: "synthetic.test", port: "22", login: "eval", hostKeySha256: "SHA256:synthetic", allowedRemoteRoot: "/owned/disposable", privateKeyEnv: "PAPERCLIP_CHAT_EVAL_SSH_PRIVATE_KEY", qualifiedHarness: "native-codex" };
+  const prerequisites = { hostname: "synthetic.test", port: "22", login: "eval", hostKeySha256: "SHA256:synthetic", knownHosts: "synthetic.test ssh-ed25519 synthetic-private-metadata", allowedRemoteRoot: "/owned/disposable", privateKeyEnv: "PAPERCLIP_CHAT_EVAL_SSH_PRIVATE_KEY", qualifiedHarness: "native-codex" };
   const config = { schemaVersion: 1, providers: { ssh: { disposable: true, resourceIds: ["owned-ssh"], credentialEnv: [], prerequisites } } };
   writeFileSync(configFile, JSON.stringify(config), { mode: 0o600 });
   const staged = stageChatPrivateInputs({ execution: { ...execution, task: { id: scenarioId } } as MatrixExecution, descriptor, privateDir: root, secrets: [], env: { PAPERCLIP_CHAT_CATALOG_EXTERNAL_CONFIG: configFile, PAPERCLIP_CHAT_EVAL_SSH_PRIVATE_KEY: "selected-ssh-key" } });
diff --git a/tests/runner-e2e/chat-runtime-private-requirements.ts b/tests/runner-e2e/chat-runtime-private-requirements.ts
index 5c03da442f5..b04d8d06f1c 100644
--- a/tests/runner-e2e/chat-runtime-private-requirements.ts
+++ b/tests/runner-e2e/chat-runtime-private-requirements.ts
@@ -4,9 +4,9 @@ export const runtimePrivateRequirements = {
   "execution-environments.prepare-image": { provider: "daytona", fields: ["imageDigest", "imageRef", "region", "disposableNamespace", "toolsManifest"], credentials: ["DAYTONA_API_KEY"] },
   "execution-environments.assign-computer": { provider: "daytona", fields: ["imageDigest", "imageRef", "region", "disposableNamespace", "qualifiedHarness"], credentials: ["DAYTONA_API_KEY"] },
   "agents.ambiguous-cloud-code": { provider: "daytona", fields: ["imageDigest", "imageRef", "region", "disposableNamespace", "qualifiedHarness"], credentials: ["ANTHROPIC_API_KEY", "DAYTONA_API_KEY"] },
-  "execution-environments.add-computer": { provider: "ssh", fields: ["hostname", "port", "login", "hostKeySha256", "allowedRemoteRoot", "privateKeyEnv", "qualifiedHarness"], credentials: [] },
-  "execution-environments.test-computer": { provider: "ssh", fields: ["hostname", "port", "login", "hostKeySha256", "allowedRemoteRoot", "privateKeyEnv", "qualifiedHarness"], credentials: [] },
-  "execution-environments.choose-capable-target": { provider: "ssh", fields: ["hostname", "port", "login", "hostKeySha256", "allowedRemoteRoot", "privateKeyEnv", "qualifiedHarness"], credentials: [] },
+  "execution-environments.add-computer": { provider: "ssh", fields: ["hostname", "port", "login", "hostKeySha256", "knownHosts", "allowedRemoteRoot", "privateKeyEnv", "qualifiedHarness"], credentials: [] },
+  "execution-environments.test-computer": { provider: "ssh", fields: ["hostname", "port", "login", "hostKeySha256", "knownHosts", "allowedRemoteRoot", "privateKeyEnv", "qualifiedHarness"], credentials: [] },
+  "execution-environments.choose-capable-target": { provider: "ssh", fields: ["hostname", "port", "login", "hostKeySha256", "knownHosts", "allowedRemoteRoot", "privateKeyEnv", "qualifiedHarness"], credentials: [] },
   "agents.existing-grok-bot": { provider: "grok", fields: ["botId", "endpoint", "challengeMethod", "credentialEnvName"], credentials: [] },
   "agents.managed-profile": { provider: "anthropicManaged", fields: ["lockedEnvironmentId", "operatorProfileId", "retentionPolicyVersion", "retentionAckId", "providerAccountRef"], credentials: ["ANTHROPIC_API_KEY"] },
   "agents.hire-claude-code": { provider: "claude", fields: ["targetRef", "harnessExecutable", "model", "accountBindingRef"], credentials: ["ANTHROPIC_API_KEY"] },