diff --git a/.bazelignore b/.bazelignore
index a780bc494d6..ba65fba9bd6 100644
--- a/.bazelignore
+++ b/.bazelignore
@@ -17,6 +17,7 @@ client/search-ui/node_modules
 client/shared/node_modules
 client/storybook/node_modules
 client/template-parser/node_modules
+client/testing/node_modules
 client/web/node_modules
 client/wildcard/node_modules
 client/vscode/node_modules
diff --git a/client/search-ui/src/input/SearchContextDropdown.test.tsx b/client/search-ui/src/input/SearchContextDropdown.test.tsx
index 31d65798327..147302c276f 100644
--- a/client/search-ui/src/input/SearchContextDropdown.test.tsx
+++ b/client/search-ui/src/input/SearchContextDropdown.test.tsx
@@ -3,7 +3,6 @@ import userEvent from '@testing-library/user-event'
 import { act } from 'react-dom/test-utils'
 import { spy, assert, useFakeTimers } from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { NOOP_TELEMETRY_SERVICE } from '@sourcegraph/shared/src/telemetry/telemetryService'
 import { MockIntersectionObserver } from '@sourcegraph/shared/src/testing/MockIntersectionObserver'
 import {
@@ -11,6 +10,7 @@ import {
     mockGetUserSearchContextNamespaces,
 } from '@sourcegraph/shared/src/testing/searchContexts/testHelpers'
 import { NOOP_PLATFORM_CONTEXT } from '@sourcegraph/shared/src/testing/searchTestHelpers'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 
 import { SearchContextDropdown, SearchContextDropdownProps } from './SearchContextDropdown'
 
diff --git a/client/search-ui/src/results/progress/StreamingProgressSkippedPopover.test.tsx b/client/search-ui/src/results/progress/StreamingProgressSkippedPopover.test.tsx
index beab11a590a..e1058611700 100644
--- a/client/search-ui/src/results/progress/StreamingProgressSkippedPopover.test.tsx
+++ b/client/search-ui/src/results/progress/StreamingProgressSkippedPopover.test.tsx
@@ -2,8 +2,8 @@ import { screen, within } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { Progress } from '@sourcegraph/shared/src/search/stream'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 import { renderWithBrandedContext } from '@sourcegraph/wildcard/src/testing'
 
 import { StreamingProgressSkippedPopover } from './StreamingProgressSkippedPopover'
diff --git a/client/shared/src/actions/ActionItem.test.tsx b/client/shared/src/actions/ActionItem.test.tsx
index 8f9e36f386f..39430a09870 100644
--- a/client/shared/src/actions/ActionItem.test.tsx
+++ b/client/shared/src/actions/ActionItem.test.tsx
@@ -3,9 +3,9 @@ import userEvent from '@testing-library/user-event'
 import * as H from 'history'
 import { NEVER } from 'rxjs'
 
+import { assertAriaEnabled } from '@sourcegraph/testing'
 import { renderWithBrandedContext } from '@sourcegraph/wildcard/src/testing'
 
-import { assertAriaEnabled } from '../../dev/aria-asserts'
 import { createBarrier } from '../api/integration-test/testHelpers'
 import { NOOP_TELEMETRY_SERVICE } from '../telemetry/telemetryService'
 
diff --git a/client/testing/.eslintignore b/client/testing/.eslintignore
new file mode 100644
index 00000000000..466e24805a9
--- /dev/null
+++ b/client/testing/.eslintignore
@@ -0,0 +1 @@
+out/
\ No newline at end of file
diff --git a/client/testing/.eslintrc.js b/client/testing/.eslintrc.js
new file mode 100644
index 00000000000..23c93898412
--- /dev/null
+++ b/client/testing/.eslintrc.js
@@ -0,0 +1,12 @@
+// @ts-check
+
+const baseConfig = require('../../.eslintrc.js')
+
+module.exports = {
+  extends: '../../.eslintrc.js',
+  parserOptions: {
+    ...baseConfig.parserOptions,
+    project: [__dirname + '/tsconfig.json'],
+  },
+  overrides: baseConfig.overrides,
+}
diff --git a/client/testing/README.md b/client/testing/README.md
new file mode 100644
index 00000000000..45b58d5833d
--- /dev/null
+++ b/client/testing/README.md
@@ -0,0 +1,4 @@
+# Tools for writing tests
+
+Package-agnostic utilities for unit and integration tests.
+App or package-specific utilities should live in `client/{packageName}/src/testing`.
diff --git a/client/testing/babel.config.js b/client/testing/babel.config.js
new file mode 100644
index 00000000000..73a95d310cd
--- /dev/null
+++ b/client/testing/babel.config.js
@@ -0,0 +1,5 @@
+// @ts-check
+
+module.exports = {
+  extends: '../../babel.config.js',
+}
diff --git a/client/testing/jest.config.js b/client/testing/jest.config.js
new file mode 100644
index 00000000000..e1cb108cbe1
--- /dev/null
+++ b/client/testing/jest.config.js
@@ -0,0 +1,13 @@
+// @ts-check
+
+const config = require('../../jest.config.base')
+
+const exportedConfig = {
+  ...config,
+  displayName: 'testing',
+  rootDir: __dirname,
+  roots: ['<rootDir>'],
+  verbose: true,
+}
+
+module.exports = exportedConfig
diff --git a/client/testing/package.json b/client/testing/package.json
new file mode 100644
index 00000000000..689a6de405c
--- /dev/null
+++ b/client/testing/package.json
@@ -0,0 +1,13 @@
+{
+  "private": true,
+  "name": "@sourcegraph/testing",
+  "version": "0.0.1",
+  "description": "Sourcegraph testing API",
+  "main": "./src/index.ts",
+  "sideEffects": false,
+  "license": "Apache-2.0",
+  "scripts": {
+    "lint:js": "yarn run -T eslint --cache 'src/**/*.[jt]s?(x)'",
+    "test": "yarn run -T jest"
+  }
+}
diff --git a/client/shared/dev/aria-asserts.ts b/client/testing/src/aria-asserts.ts
similarity index 100%
rename from client/shared/dev/aria-asserts.ts
rename to client/testing/src/aria-asserts.ts
diff --git a/client/testing/src/index.ts b/client/testing/src/index.ts
new file mode 100644
index 00000000000..22dad0ea609
--- /dev/null
+++ b/client/testing/src/index.ts
@@ -0,0 +1 @@
+export * from './aria-asserts'
diff --git a/client/testing/tsconfig.json b/client/testing/tsconfig.json
new file mode 100644
index 00000000000..ab44a74f4ad
--- /dev/null
+++ b/client/testing/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.json",
+  "references": [{ "path": "../common" }],
+  "compilerOptions": {
+    "jsx": "react-jsx",
+    "module": "commonjs",
+    "sourceRoot": "src",
+    "rootDir": ".",
+    "outDir": "./out",
+    "baseUrl": "./src",
+  },
+  "include": ["./src/**/*", "./*.ts"],
+}
diff --git a/client/web/src/enterprise/code-monitoring/CreateCodeMonitorPage.test.tsx b/client/web/src/enterprise/code-monitoring/CreateCodeMonitorPage.test.tsx
index 8bac23404ff..658a569db74 100644
--- a/client/web/src/enterprise/code-monitoring/CreateCodeMonitorPage.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/CreateCodeMonitorPage.test.tsx
@@ -4,8 +4,8 @@ import * as H from 'history'
 import { NEVER, of } from 'rxjs'
 import sinon from 'sinon'
 
-import { assertAriaDisabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { MockedTestProvider } from '@sourcegraph/shared/src/testing/apollo'
+import { assertAriaDisabled } from '@sourcegraph/testing'
 import { renderWithBrandedContext } from '@sourcegraph/wildcard/src/testing'
 
 import { AuthenticatedUser } from '../../auth'
diff --git a/client/web/src/enterprise/code-monitoring/ManageCodeMonitorPage.test.tsx b/client/web/src/enterprise/code-monitoring/ManageCodeMonitorPage.test.tsx
index 4af1143fd05..07658057292 100644
--- a/client/web/src/enterprise/code-monitoring/ManageCodeMonitorPage.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/ManageCodeMonitorPage.test.tsx
@@ -4,8 +4,8 @@ import * as H from 'history'
 import { NEVER, of } from 'rxjs'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { MockedTestProvider } from '@sourcegraph/shared/src/testing/apollo'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 import { renderWithBrandedContext } from '@sourcegraph/wildcard/src/testing'
 
 import {
diff --git a/client/web/src/enterprise/code-monitoring/components/CodeMonitorForm.test.tsx b/client/web/src/enterprise/code-monitoring/components/CodeMonitorForm.test.tsx
index 635e6e4e40d..912092ec180 100644
--- a/client/web/src/enterprise/code-monitoring/components/CodeMonitorForm.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/components/CodeMonitorForm.test.tsx
@@ -2,8 +2,8 @@ import { fireEvent, getByRole, screen } from '@testing-library/react'
 import { createMemoryHistory, createLocation } from 'history'
 import { NEVER } from 'rxjs'
 
-import { assertAriaDisabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { MockedTestProvider } from '@sourcegraph/shared/src/testing/apollo'
+import { assertAriaDisabled } from '@sourcegraph/testing'
 import { renderWithBrandedContext } from '@sourcegraph/wildcard/src/testing'
 
 import { mockAuthenticatedUser, mockCodeMonitorFields } from '../testing/util'
diff --git a/client/web/src/enterprise/code-monitoring/components/actions/ActionEditor.test.tsx b/client/web/src/enterprise/code-monitoring/components/actions/ActionEditor.test.tsx
index 9b70f148a78..3e8f1886145 100644
--- a/client/web/src/enterprise/code-monitoring/components/actions/ActionEditor.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/components/actions/ActionEditor.test.tsx
@@ -2,7 +2,7 @@ import { render } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import sinon from 'sinon'
 
-import { assertAriaDisabled } from '@sourcegraph/shared/dev/aria-asserts'
+import { assertAriaDisabled } from '@sourcegraph/testing'
 
 import { ActionEditor, ActionEditorProps } from './ActionEditor'
 
diff --git a/client/web/src/enterprise/code-monitoring/components/actions/EmailAction.test.tsx b/client/web/src/enterprise/code-monitoring/components/actions/EmailAction.test.tsx
index d9bb9ddfdbc..914fa245128 100644
--- a/client/web/src/enterprise/code-monitoring/components/actions/EmailAction.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/components/actions/EmailAction.test.tsx
@@ -3,8 +3,8 @@ import { render } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { MockedTestProvider, waitForNextApolloResponse } from '@sourcegraph/shared/src/testing/apollo'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 
 import { MonitorEmailPriority, SendTestEmailResult, SendTestEmailVariables } from '../../../../graphql-operations'
 import { mockAuthenticatedUser } from '../../testing/util'
diff --git a/client/web/src/enterprise/code-monitoring/components/actions/SlackWebhookAction.test.tsx b/client/web/src/enterprise/code-monitoring/components/actions/SlackWebhookAction.test.tsx
index ba736f43a13..dffb5f58a36 100644
--- a/client/web/src/enterprise/code-monitoring/components/actions/SlackWebhookAction.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/components/actions/SlackWebhookAction.test.tsx
@@ -3,8 +3,8 @@ import { render } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { MockedTestProvider, waitForNextApolloResponse } from '@sourcegraph/shared/src/testing/apollo'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 
 import { SendTestSlackWebhookResult, SendTestSlackWebhookVariables } from '../../../../graphql-operations'
 import { mockAuthenticatedUser } from '../../testing/util'
diff --git a/client/web/src/enterprise/code-monitoring/components/actions/WebhookAction.test.tsx b/client/web/src/enterprise/code-monitoring/components/actions/WebhookAction.test.tsx
index cc871ddb1db..250e9666835 100644
--- a/client/web/src/enterprise/code-monitoring/components/actions/WebhookAction.test.tsx
+++ b/client/web/src/enterprise/code-monitoring/components/actions/WebhookAction.test.tsx
@@ -3,8 +3,8 @@ import { render } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
 import { MockedTestProvider, waitForNextApolloResponse } from '@sourcegraph/shared/src/testing/apollo'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 
 import { SendTestWebhookResult, SendTestWebhookVariables } from '../../../../graphql-operations'
 import { mockAuthenticatedUser } from '../../testing/util'
diff --git a/client/wildcard/src/components/Feedback/FeedbackPrompt/FeedbackPrompt.test.tsx b/client/wildcard/src/components/Feedback/FeedbackPrompt/FeedbackPrompt.test.tsx
index 11f89fc3f81..bc09e2a90fa 100644
--- a/client/wildcard/src/components/Feedback/FeedbackPrompt/FeedbackPrompt.test.tsx
+++ b/client/wildcard/src/components/Feedback/FeedbackPrompt/FeedbackPrompt.test.tsx
@@ -2,7 +2,7 @@ import { cleanup, fireEvent, render, screen } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 
 import { Button } from '../../Button'
 import { PopoverTrigger } from '../../Popover'
diff --git a/client/wildcard/src/components/PageSwitcher/PageSwitcher.test.tsx b/client/wildcard/src/components/PageSwitcher/PageSwitcher.test.tsx
index a7010fb4349..1e79d83c672 100644
--- a/client/wildcard/src/components/PageSwitcher/PageSwitcher.test.tsx
+++ b/client/wildcard/src/components/PageSwitcher/PageSwitcher.test.tsx
@@ -1,7 +1,7 @@
 import { render, RenderResult, cleanup, fireEvent } from '@testing-library/react'
 import sinon from 'sinon'
 
-import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/shared/dev/aria-asserts'
+import { assertAriaDisabled, assertAriaEnabled } from '@sourcegraph/testing'
 
 import { PageSwitcher, PageSwitcherProps } from './PageSwitcher'
 
diff --git a/client/wildcard/tsconfig.json b/client/wildcard/tsconfig.json
index 5ff1c29e6b2..1d1ebaec61b 100644
--- a/client/wildcard/tsconfig.json
+++ b/client/wildcard/tsconfig.json
@@ -8,12 +8,7 @@
     "baseUrl": "./src",
     "jsx": "react-jsx",
   },
-  "references": [
-    { "path": "../shared" },
-    { "path": "../branded" },
-    { "path": "../../schema" },
-    { "path": "../common" },
-  ],
+  "references": [{ "path": "../branded" }, { "path": "../common" }, { "path": "../testing" }],
   "include": ["**/*", ".*"],
   "exclude": ["../../node_modules", "./node_modules", "./out"],
 }
diff --git a/dev/foreach-ts-project.sh b/dev/foreach-ts-project.sh
index e05f58b9195..04c23a91b4b 100755
--- a/dev/foreach-ts-project.sh
+++ b/dev/foreach-ts-project.sh
@@ -29,6 +29,7 @@ DIRS=(
   client/shared
   client/storybook
   client/template-parser
+  client/testing
   client/vscode
   client/web
   client/wildcard
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index fb22a01ab60..d5870847320 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -848,6 +848,9 @@ importers:
   client/template-parser:
     specifiers: {}
 
+  client/testing:
+    specifiers: {}
+
   client/vscode:
     specifiers:
       vsce: ^2.7.0
diff --git a/tsconfig.all.json b/tsconfig.all.json
index f6629f7d1fd..2b689ac63cc 100644
--- a/tsconfig.all.json
+++ b/tsconfig.all.json
@@ -20,6 +20,7 @@
     { "path": "client/storybook" },
     { "path": "client/search" },
     { "path": "client/search-ui" },
+    { "path": "client/testing" },
     { "path": "dev/release" },
     { "path": "schema" },
     { "path": "client/codeintellify" },
diff --git a/yarn.lock b/yarn.lock
index a7b69290b1d..67f954fc730 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5519,6 +5519,12 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@sourcegraph/testing@workspace:client/testing":
+  version: 0.0.0-use.local
+  resolution: "@sourcegraph/testing@workspace:client/testing"
+  languageName: unknown
+  linkType: soft
+
 "@sourcegraph/tsconfig@npm:^4.0.1":
   version: 4.0.1
   resolution: "@sourcegraph/tsconfig@npm:4.0.1"