diff --git a/test/vitest-scoped-config.test.ts b/test/vitest-scoped-config.test.ts
index c9327919334..2b4554a7e7d 100644
--- a/test/vitest-scoped-config.test.ts
+++ b/test/vitest-scoped-config.test.ts
@@ -120,6 +120,15 @@ function expectThreadedNonIsolatedRunner(config: {
   expect(normalizeConfigPath(testConfig.runner)).toBe("test/non-isolated-runner.ts");
 }
 
+function expectThreadedIsolatedRunner(config: {
+  test?: { pool?: unknown; isolate?: unknown; runner?: unknown };
+}) {
+  const testConfig = requireTestConfig(config);
+  expect(testConfig.pool).toBe("threads");
+  expect(testConfig.isolate).toBe(true);
+  expect(testConfig.runner).toBeUndefined();
+}
+
 describe("resolveVitestIsolation", () => {
   it("aliases private QA plugin SDK subpaths for source tests only", () => {
     for (const subpath of PRIVATE_PLUGIN_SDK_SUBPATHS) {
@@ -362,7 +371,6 @@ describe("scoped vitest configs", () => {
       defaultExtensionProvidersConfig,
       defaultExtensionSignalConfig,
       defaultExtensionSlackConfig,
-      defaultInfraConfig,
       defaultAutoReplyConfig,
       defaultAutoReplyCoreConfig,
       defaultAutoReplyTopLevelConfig,
@@ -379,6 +387,7 @@ describe("scoped vitest configs", () => {
     expectThreadedNonIsolatedRunner(defaultCommandsConfig);
 
     expectThreadedNonIsolatedRunner(defaultUiConfig);
+    expectThreadedIsolatedRunner(defaultInfraConfig);
   });
 
   it("keeps the process lane off the openclaw runtime setup", () => {
diff --git a/test/vitest/vitest.infra.config.ts b/test/vitest/vitest.infra.config.ts
index 015c1cde297..d76a6d3f31c 100644
--- a/test/vitest/vitest.infra.config.ts
+++ b/test/vitest/vitest.infra.config.ts
@@ -6,6 +6,7 @@ export function createInfraVitestConfig(env?: Record<string, string | undefined>
     dir: "src",
     env,
     exclude: boundaryTestFiles,
+    isolate: true,
     name: "infra",
     passWithNoTests: true,
   });