diff --git a/tests/cliOutput.test.ts b/tests/cliOutput.test.ts
index 5373a070d..47f8b4b0d 100644
--- a/tests/cliOutput.test.ts
+++ b/tests/cliOutput.test.ts
@@ -11,6 +11,7 @@ import { sanitizeCliOutput } from "../src/cliOutput.js";
 
 const execFileAsync = promisify(execFile);
 const CLI_INTEGRATION_TIMEOUT_MS = 60_000;
+const CLI_VARIANT_TIMEOUT_MS = 120_000;
 
 describe("CLI output boundary", () => {
   it("preserves normal output and sanitizes text and JSON validation errors", () => {
@@ -156,7 +157,7 @@ describe("CLI output boundary", () => {
         ).rejects.toMatchObject({ code: 1, stdout: expect.any(String) });
       }
     },
-    CLI_INTEGRATION_TIMEOUT_MS,
+    CLI_VARIANT_TIMEOUT_MS,
   );
 
   it(
diff --git a/tests/javascriptArtifactReconstruction.test.ts b/tests/javascriptArtifactReconstruction.test.ts
index fa09dfc1a..819e392a9 100644
--- a/tests/javascriptArtifactReconstruction.test.ts
+++ b/tests/javascriptArtifactReconstruction.test.ts
@@ -537,7 +537,7 @@ describe("JavaScript artifact reconstruction", () => {
       truncated: true,
       omitted_count: 6,
     });
-  });
+  }, 15_000);
 
   it("rejects traversal from a production reader seam and malformed ASAR containers", async () => {
     const root = await fixtureDirectory();
diff --git a/vitest.config.ts b/vitest.config.ts
index a71b18fdc..1212882a4 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -8,39 +8,43 @@ const TEST_FILES = ["tests/**/*.test.ts"];
 const PROCESS_CAPTURE_TEST = "tests/processCapture.test.ts";
 const CANONICAL_TEMPORARY_DIRECTORY = realpathSync(tmpdir());
 const SERIAL_INTEGRATION_TESTS = [
+  "tests/applicationWorkflowCli.test.ts",
   "tests/browserCli.test.ts",
   "tests/cliOutput.test.ts",
+  "tests/electronCli.test.ts",
+  "tests/javascriptArtifactReconstruction.test.ts",
   PROCESS_CAPTURE_TEST,
   "tests/runtime.test.ts",
 ];
-const dualCoreProjects =
-  availableParallelism() === 2
-    ? {
-        maxWorkers: 2,
-        projects: [
-          {
-            test: {
-              name: "parallel",
-              include: TEST_FILES,
-              exclude: SERIAL_INTEGRATION_TESTS,
-            },
-          },
-          {
-            test: {
-              name: "serial-integration",
-              include: SERIAL_INTEGRATION_TESTS,
-              fileParallelism: false,
-            },
-          },
-        ],
-      }
-    : {};
+const isolatedProjects = {
+  maxWorkers: Math.min(2, availableParallelism()),
+  projects: [
+    {
+      extends: true as const,
+      test: {
+        name: "parallel",
+        include: TEST_FILES,
+        exclude: SERIAL_INTEGRATION_TESTS,
+        sequence: { groupOrder: 0 },
+      },
+    },
+    {
+      extends: true as const,
+      test: {
+        name: "serial-integration",
+        include: SERIAL_INTEGRATION_TESTS,
+        fileParallelism: false,
+        sequence: { groupOrder: 1 },
+      },
+    },
+  ],
+};
 
 export default defineConfig({
   test: {
     include: TEST_FILES,
     env: { TMPDIR: CANONICAL_TEMPORARY_DIRECTORY },
-    ...dualCoreProjects,
+    ...isolatedProjects,
     retry: 2,
     reporters: ["default", "verbose"],
     coverage: {