diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index e6acc2b7cb3e..a4394c1efee3 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -90,3 +90,44 @@ jobs:
         run: yarn test-ci-partial:parallel --max-workers ${{ steps.cpu-cores.outputs.count }}
         env:
           CI: true
+
+  test-circus:
+    name: Node LTS on ${{ matrix.os }} using jest-circus
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Set git config
+        shell: bash
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.symlinks true
+        if: runner.os == 'Windows'
+      - uses: actions/checkout@v2
+      - name: Get yarn cache
+        id: yarn-cache
+        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
+      - uses: actions/cache@v2
+        with:
+          path: ${{ steps.yarn-cache.outputs.dir }}
+          key: ${{ runner.os }}-node-14.x-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-node-14.x-yarn-
+      - name: Use Node.js 14.x
+        uses: actions/setup-node@v2.1.2
+        with:
+          node-version: 14.x
+      - name: install
+        run: yarn --immutable
+      - name: build
+        run: yarn build:js
+      - name: Get number of CPU cores
+        id: cpu-cores
+        uses: SimenB/github-actions-cpu-cores@v1
+      - name: run tests using jest-circus
+        run: yarn jest-circus-ci --max-workers ${{ steps.cpu-cores.outputs.count }}
+        env:
+          CI: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index beca614674f6..68cca5f06e33 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 ### Fixes
 
 - `[jest-circus]` Fixed the issue of beforeAll & afterAll hooks getting executed even if it is inside a skipped `describe` block [#10451](https://github.com/facebook/jest/issues/10451)
+- `[jest-circus]` Fix `testLocation` on Windows when using `test.each` ([#10871](https://github.com/facebook/jest/pull/10871))
 - `[jest-jasmine2]` Fixed the issue of beforeAll & afterAll hooks getting executed even if it is inside a skipped `describe` block when it has child `tests` marked as either `only` or `todo` [#10451](https://github.com/facebook/jest/issues/10451)
 - `[jest-jasmine2]` Fixed the issues of child `tests` marked with `only` or `todo` getting executed even if it is inside a skipped parent `describe` block [#10451](https://github.com/facebook/jest/issues/10451)
 - `[jest-console]` `console.dir` now respects the second argument correctly ([#10638](https://github.com/facebook/jest/pull/10638))
diff --git a/e2e/runJest.ts b/e2e/runJest.ts
index d082ca739cea..56c25746739b 100644
--- a/e2e/runJest.ts
+++ b/e2e/runJest.ts
@@ -23,7 +23,7 @@ type RunJestOptions = {
   skipPkgJsonCheck?: boolean; // don't complain if can't find package.json
   stripAnsi?: boolean; // remove colors from stdout and stderr,
   timeout?: number; // kill the Jest process after X milliseconds
-  env?: Record<string, string>;
+  env?: NodeJS.ProcessEnv;
 };
 
 // return the result of the spawned process:
@@ -74,13 +74,17 @@ function spawnJest(
     `,
     );
   }
-  const env = Object.assign({}, process.env, {FORCE_COLOR: '0'}, options.env);
+  const env: NodeJS.ProcessEnv = {
+    ...process.env,
+    FORCE_COLOR: '0',
+    ...options.env,
+  };
 
   if (options.nodeOptions) env['NODE_OPTIONS'] = options.nodeOptions;
   if (options.nodePath) env['NODE_PATH'] = options.nodePath;
 
   const spawnArgs = [JEST_PATH, ...args];
-  const spawnOptions = {
+  const spawnOptions: execa.CommonOptions<string> = {
     cwd: dir,
     env,
     reject: false,
diff --git a/package.json b/package.json
index 3bea730d2ab7..24c9a930bbfe 100644
--- a/package.json
+++ b/package.json
@@ -98,6 +98,8 @@
     "clean-all": "yarn clean-e2e && yarn build-clean && rimraf './packages/*/node_modules' && rimraf './node_modules'",
     "clean-e2e": "node ./scripts/cleanE2e.js",
     "jest": "node ./packages/jest-cli/bin/jest.js",
+    "jest-circus": "JEST_CIRCUS=1 yarn jest",
+    "jest-circus-ci": "yarn jest-circus --color --config jest.config.ci.js",
     "jest-coverage": "yarn jest --coverage",
     "lint": "eslint . --cache --ext js,jsx,ts,tsx,md",
     "lint:prettier": "prettier '**/*.{md,yml,yaml}' 'website/static/**/*.{css,js}' --write --ignore-path .gitignore",
diff --git a/packages/jest-circus/src/utils.ts b/packages/jest-circus/src/utils.ts
index 7a52de3a46af..345bdf2b1d54 100644
--- a/packages/jest-circus/src/utils.ts
+++ b/packages/jest-circus/src/utils.ts
@@ -9,6 +9,7 @@ import * as path from 'path';
 import co from 'co';
 import dedent = require('dedent');
 import isGeneratorFn from 'is-generator-fn';
+import slash = require('slash');
 import StackUtils = require('stack-utils');
 import type {AssertionResult, Status} from '@jest/test-result';
 import type {Circus} from '@jest/types';
@@ -18,7 +19,7 @@ import {ROOT_DESCRIBE_BLOCK_NAME, getState} from './state';
 
 const stackUtils = new StackUtils({cwd: 'A path that does not exist'});
 
-const jestEachBuildDir = path.dirname(require.resolve('jest-each'));
+const jestEachBuildDir = slash(path.dirname(require.resolve('jest-each')));
 
 export const makeDescribe = (
   name: Circus.BlockName,