✅(jest) Make tests run concurrently (#5378)

**Description**

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justifying the need for this PR -->

They used to be running in a concurrent fashion in the past. But we
stopped doing it due to a recent regression on the stability of our CI
with Node 23.

The regression being still noticeable even without it and because of the
cost of not doing the runs in a concurrent fashion, we move back to
concurrent execution.

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related to this bug and link them -->
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issue or discussion attached to it -->

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following before opening the PR_

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specification
- [x] My PR references one of several related issues (if any)
- [x] New features or breaking changes must come with an associated
Issue or Discussion
- [x] My PR does not add any new dependency without an associated Issue
or Discussion
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impacts properly
- [x] My PR adds relevant tests and they would have failed without my PR
(when applicable)

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**Advanced**

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- [x] Category: ✅ Add or update tests
- [x] Impacts: Faster CI

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<!-- * ✅ Add or update tests -->
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packages/jest/test/jest-fast-check.spec.ts

@@ -58,7 +58,7 @@ describe.each<DescribeOptions>([
 ])('$specName', ({ runnerName, useWorkers, testRunner }) => {
   const options = { useWorkers, testRunner };
 
-  it('should pass on successful no prop mode', async () => {
+  it.concurrent('should pass on successful no prop mode', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner('successful no prop', () => {
@@ -74,7 +74,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[√✓] successful no prop/);
   });
 
-  it('should fail on failing no prop mode', async () => {
+  it.concurrent('should fail on failing no prop mode', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner('failing no prop', () => {
@@ -91,7 +91,7 @@ describe.each<DescribeOptions>([
   });
 
   if (useWorkers) {
-    it('should fail on property blocking the main thread', async () => {
+    it.concurrent('should fail on property blocking the main thread', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.prop([fc.nat()], { timeout: 500 })('property block main thread', () => {
@@ -108,7 +108,7 @@ describe.each<DescribeOptions>([
     });
   }
 
-  it('should pass on truthy synchronous property', async () => {
+  it.concurrent('should pass on truthy synchronous property', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop([fc.string(), fc.string(), fc.string()])('property pass sync', (a, b, c) => {
@@ -124,7 +124,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[√✓] property pass sync \(with seed=-?\d+\)/);
   });
 
-  it('should pass on truthy asynchronous property', async () => {
+  it.concurrent('should pass on truthy asynchronous property', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop([fc.string(), fc.string(), fc.string()])('property pass async', async (a, b, c) => {
@@ -141,7 +141,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[√✓] property pass async \(with seed=-?\d+\)/);
   });
 
-  it('should fail on falsy synchronous property', async () => {
+  it.concurrent('should fail on falsy synchronous property', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop([fc.nat()])('property fail sync', (a) => {
@@ -158,7 +158,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[×✕] property fail sync \(with seed=-?\d+\)/);
   });
 
-  it('should fail on falsy asynchronous property', async () => {
+  it.concurrent('should fail on falsy asynchronous property', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop([fc.nat()])('property fail async', async (a) => {
@@ -176,7 +176,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[×✕] property fail async \(with seed=-?\d+\)/);
   });
 
-  it('should pass on truthy record-based property', async () => {
+  it.concurrent('should pass on truthy record-based property', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop({ a: fc.string(), b: fc.string(), c: fc.string() })('property pass record', ({ a, b, c }) => {
@@ -195,7 +195,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[√✓] property pass record \(with seed=-?\d+\)/);
   });
 
-  it('should fail on falsy record-based property', async () => {
+  it.concurrent('should fail on falsy record-based property', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop({ a: fc.string(), b: fc.string(), c: fc.string() })('property fail record', ({ a, b, c }) => {
@@ -212,7 +212,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[×✕] property fail record \(with seed=-?\d+\)/);
   });
 
-  it('should fail on falsy record-based property with seed', async () => {
+  it.concurrent('should fail on falsy record-based property with seed', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop({ a: fc.string(), b: fc.string(), c: fc.string() }, { seed: 4869 })(
@@ -230,7 +230,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[×✕] property fail record seeded \(with seed=4869\)/);
   });
 
-  it('should fail with locally requested seed', async () => {
+  it.concurrent('should fail with locally requested seed', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop([fc.constant(null)], { seed: 4242 })('property fail with locally requested seed', (_unused) => false);
@@ -245,7 +245,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[×✕] property fail with locally requested seed \(with seed=4242\)/);
   });
 
-  it('should fail with globally requested seed', async () => {
+  it.concurrent('should fail with globally requested seed', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       fc.configureGlobal({ seed: 4848 });
@@ -261,7 +261,7 @@ describe.each<DescribeOptions>([
     expect(out).toMatch(/[×✕] property fail with globally requested seed \(with seed=4848\)/);
   });
 
-  it('should fail with seed requested at jest level', async () => {
+  it.concurrent('should fail with seed requested at jest level', async () => {
     // Arrange
     const specDirectory = await writeToFile(runnerName, options, () => {
       runner.prop([fc.constant(null)])('property fail with globally requested seed', (_unused) => false);
@@ -277,7 +277,7 @@ describe.each<DescribeOptions>([
   });
 
   describe('.skip', () => {
-    it('should never be executed', async () => {
+    it.concurrent('should never be executed', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.skip.prop([fc.constant(null)])('property never executed', (_unused) => false);
@@ -294,7 +294,7 @@ describe.each<DescribeOptions>([
 
   if (testRunner === undefined) {
     describe('.failing', () => {
-      it('should fail on successful no prop mode', async () => {
+      it.concurrent('should fail on successful no prop mode', async () => {
         // Arrange
         const specDirectory = await writeToFile(runnerName, options, () => {
           runner.failing('successful no prop', () => {
@@ -310,7 +310,7 @@ describe.each<DescribeOptions>([
         expect(out).toMatch(/[×✕] successful no prop/);
       });
 
-      it('should pass on failing no prop mode', async () => {
+      it.concurrent('should pass on failing no prop mode', async () => {
         // Arrange
         const specDirectory = await writeToFile(runnerName, options, () => {
           runner.failing('failing no prop', () => {
@@ -326,7 +326,7 @@ describe.each<DescribeOptions>([
         expect(out).toMatch(/[√✓] failing no prop/);
       });
 
-      it('should pass because failing', async () => {
+      it.concurrent('should pass because failing', async () => {
         // Arrange
         const specDirectory = await writeToFile(runnerName, options, () => {
           runner.failing.prop([fc.constant(null)])('property pass because failing', async (_unused) => false);
@@ -340,7 +340,7 @@ describe.each<DescribeOptions>([
         expect(out).toMatch(/[√✓] property pass because failing \(with seed=-?\d+\)/);
       });
 
-      it('should fail because passing', async () => {
+      it.concurrent('should fail because passing', async () => {
         // Arrange
         const specDirectory = await writeToFile(runnerName, options, () => {
           runner.failing.prop([fc.constant(null)])('property fail because passing', async (_unused) => true);
@@ -357,7 +357,7 @@ describe.each<DescribeOptions>([
   }
 
   describe('.concurrent', () => {
-    it('should pass on truthy property', async () => {
+    it.concurrent('should pass on truthy property', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.concurrent.prop([fc.constant(null)])('property pass on truthy property', (_unused) => true);
@@ -371,7 +371,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[√✓] property pass on truthy property \(with seed=-?\d+\)/);
     });
 
-    it('should fail on falsy property', async () => {
+    it.concurrent('should fail on falsy property', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.concurrent.prop([fc.constant(null)])('property fail on falsy property', (_unused) => false);
@@ -388,7 +388,7 @@ describe.each<DescribeOptions>([
 
     if (testRunner === undefined) {
       describe('.failing', () => {
-        it('should pass because failing', async () => {
+        it.concurrent('should pass because failing', async () => {
           // Arrange
           const specDirectory = await writeToFile(runnerName, options, () => {
             runner.concurrent.failing.prop([fc.constant(null)])(
@@ -405,7 +405,7 @@ describe.each<DescribeOptions>([
           expect(out).toMatch(/[√✓] property pass because failing \(with seed=-?\d+\)/);
         });
 
-        it('should fail because passing', async () => {
+        it.concurrent('should fail because passing', async () => {
           // Arrange
           const specDirectory = await writeToFile(runnerName, options, () => {
             runner.concurrent.failing.prop([fc.constant(null)])(
@@ -426,7 +426,7 @@ describe.each<DescribeOptions>([
   });
 
   describe('timeout', () => {
-    it('should fail as test takes longer than global Jest timeout', async () => {
+    it.concurrent('should fail as test takes longer than global Jest timeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.prop([fc.nat()])('property takes longer than global Jest timeout', async () => {
@@ -443,7 +443,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[×✕] property takes longer than global Jest timeout/);
     });
 
-    it('should fail as test takes longer than Jest local timeout', async () => {
+    it.concurrent('should fail as test takes longer than Jest local timeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.prop([fc.nat()])(
@@ -464,7 +464,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[×✕] property takes longer than Jest local timeout/);
     });
 
-    it('should fail as test takes longer than Jest config timeout', async () => {
+    it.concurrent('should fail as test takes longer than Jest config timeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, { ...options, testTimeoutConfig: 1000 }, () => {
         runner.prop([fc.nat()])('property takes longer than Jest config timeout', async () => {
@@ -481,7 +481,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[×✕] property takes longer than Jest config timeout/);
     });
 
-    it('should fail as test takes longer than Jest setTimeout', async () => {
+    it.concurrent('should fail as test takes longer than Jest setTimeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         if (typeof jest !== 'undefined') {
@@ -501,7 +501,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[×✕] property takes longer than Jest setTimeout/);
     });
 
-    it('should fail as test takes longer than Jest CLI timeout', async () => {
+    it.concurrent('should fail as test takes longer than Jest CLI timeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         runner.prop([fc.nat()])('property takes longer than Jest CLI timeout', async () => {
@@ -518,7 +518,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[×✕] property takes longer than Jest CLI timeout/);
     });
 
-    it('should fail but favor local Jest timeout over Jest setTimeout', async () => {
+    it.concurrent('should fail but favor local Jest timeout over Jest setTimeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         if (typeof jest !== 'undefined') {
@@ -542,7 +542,7 @@ describe.each<DescribeOptions>([
       expect(out).toMatch(/[×✕] property favor local Jest timeout over Jest setTimeout/);
     });
 
-    it('should fail but favor Jest setTimeout over Jest CLI timeout', async () => {
+    it.concurrent('should fail but favor Jest setTimeout over Jest CLI timeout', async () => {
       // Arrange
       const specDirectory = await writeToFile(runnerName, options, () => {
         if (typeof jest !== 'undefined') {

packages/jest/vitest.config.ts

@@ -1,8 +1,11 @@
 import { defineConfig } from 'vitest/config';
 
+const major = Number(process.versions.node.split('.')[0]);
+
 export default defineConfig({
   test: {
     testTimeout: 60000, // 60s
     include: ['**/test/*.{test,spec}.?(c|m)[jt]s?(x)'],
+    retry: major === 23 ? 5 : undefined,
   },
 });