diff --git a/packages/playwright-core/src/client/DEPS.list b/packages/playwright-core/src/client/DEPS.list
index 16a569a46d..cd30be6967 100644
--- a/packages/playwright-core/src/client/DEPS.list
+++ b/packages/playwright-core/src/client/DEPS.list
@@ -1,4 +1,4 @@
 [*]
 ../common/
 ../protocol/
-../utils/
+../utils/**
diff --git a/packages/playwright-core/src/client/locator.ts b/packages/playwright-core/src/client/locator.ts
index d9e9f98a47..68e51252b6 100644
--- a/packages/playwright-core/src/client/locator.ts
+++ b/packages/playwright-core/src/client/locator.ts
@@ -24,7 +24,7 @@ import { ElementHandle } from './elementHandle';
 import type { Frame } from './frame';
 import type { FilePayload, FrameExpectOptions, Rect, SelectOption, SelectOptionOptions, TimeoutOptions } from './types';
 import { parseResult, serializeArgument } from './jsHandle';
-import { escapeWithQuotes } from '../utils/stringUtils';
+import { escapeWithQuotes } from '../utils/isomorphic/stringUtils';
 
 export class Locator implements api.Locator {
   _frame: Frame;
diff --git a/packages/playwright-core/src/server/DEPS.list b/packages/playwright-core/src/server/DEPS.list
index da68a5e95e..a36064532c 100644
--- a/packages/playwright-core/src/server/DEPS.list
+++ b/packages/playwright-core/src/server/DEPS.list
@@ -4,8 +4,9 @@
 ../protocol/
 ../utils/
 ./
-./common/
 ./injected/
+./isomorphic/
+./registry/
 ./supplements/
 ./trace/recorder/tracing.ts
 
diff --git a/packages/playwright-core/src/server/chromium/crExecutionContext.ts b/packages/playwright-core/src/server/chromium/crExecutionContext.ts
index b1bd9decb5..51cd5aca65 100644
--- a/packages/playwright-core/src/server/chromium/crExecutionContext.ts
+++ b/packages/playwright-core/src/server/chromium/crExecutionContext.ts
@@ -20,7 +20,7 @@ import { getExceptionMessage, releaseObject } from './crProtocolHelper';
 import type { Protocol } from './protocol';
 import * as js from '../javascript';
 import { rewriteErrorMessage } from '../../utils/stackTrace';
-import { parseEvaluationResultValue } from '../common/utilityScriptSerializers';
+import { parseEvaluationResultValue } from '../isomorphic/utilityScriptSerializers';
 import { isSessionClosedError } from '../protocolError';
 
 export class CRExecutionContext implements js.ExecutionContextDelegate {
diff --git a/packages/playwright-core/src/server/common/DEPS.list b/packages/playwright-core/src/server/common/DEPS.list
deleted file mode 100644
index e43dcb5d9f..0000000000
--- a/packages/playwright-core/src/server/common/DEPS.list
+++ /dev/null
@@ -1 +0,0 @@
-[*]
diff --git a/packages/playwright-core/src/server/common/README.md b/packages/playwright-core/src/server/common/README.md
deleted file mode 100644
index a4f81602e1..0000000000
--- a/packages/playwright-core/src/server/common/README.md
+++ /dev/null
@@ -1 +0,0 @@
-Files in this folder are used both in Node.js and injected environments, they can't have dependencies.
\ No newline at end of file
diff --git a/packages/playwright-core/src/server/firefox/ffExecutionContext.ts b/packages/playwright-core/src/server/firefox/ffExecutionContext.ts
index 127303ee2d..ba981da942 100644
--- a/packages/playwright-core/src/server/firefox/ffExecutionContext.ts
+++ b/packages/playwright-core/src/server/firefox/ffExecutionContext.ts
@@ -19,7 +19,7 @@ import * as js from '../javascript';
 import type { FFSession } from './ffConnection';
 import type { Protocol } from './protocol';
 import { rewriteErrorMessage } from '../../utils/stackTrace';
-import { parseEvaluationResultValue } from '../common/utilityScriptSerializers';
+import { parseEvaluationResultValue } from '../isomorphic/utilityScriptSerializers';
 import { isSessionClosedError } from '../protocolError';
 
 export class FFExecutionContext implements js.ExecutionContextDelegate {
diff --git a/packages/playwright-core/src/server/frames.ts b/packages/playwright-core/src/server/frames.ts
index 0a3fe73933..4577d508b3 100644
--- a/packages/playwright-core/src/server/frames.ts
+++ b/packages/playwright-core/src/server/frames.ts
@@ -37,8 +37,8 @@ import { serverSideCallMetadata, SdkObject } from './instrumentation';
 import { type InjectedScript } from './injected/injectedScript';
 import type { ElementStateWithoutStable, FrameExpectParams, InjectedScriptPoll, InjectedScriptProgress } from './injected/injectedScript';
 import { isSessionClosedError } from './protocolError';
-import type { ParsedSelector } from './common/selectorParser';
-import { isInvalidSelectorError, splitSelectorByFrame, stringifySelector } from './common/selectorParser';
+import type { ParsedSelector } from './isomorphic/selectorParser';
+import { isInvalidSelectorError, splitSelectorByFrame, stringifySelector } from './isomorphic/selectorParser';
 import type { SelectorInfo } from './selectors';
 import type { ScreenshotOptions } from './screenshotter';
 import type { InputFilesItems } from './dom';
diff --git a/packages/playwright-core/src/server/injected/DEPS.list b/packages/playwright-core/src/server/injected/DEPS.list
index c0a39450ff..5269c49fec 100644
--- a/packages/playwright-core/src/server/injected/DEPS.list
+++ b/packages/playwright-core/src/server/injected/DEPS.list
@@ -1,2 +1,3 @@
+# Files in this folder are used in browser environment, they can only depend on isomorphic files.
 [*]
-../common/
+../isomorphic/
\ No newline at end of file
diff --git a/packages/playwright-core/src/server/injected/injectedScript.ts b/packages/playwright-core/src/server/injected/injectedScript.ts
index 26cbba9c47..d1bd83b1cf 100644
--- a/packages/playwright-core/src/server/injected/injectedScript.ts
+++ b/packages/playwright-core/src/server/injected/injectedScript.ts
@@ -19,11 +19,11 @@ import { XPathEngine } from './xpathSelectorEngine';
 import { ReactEngine } from './reactSelectorEngine';
 import { VueEngine } from './vueSelectorEngine';
 import { RoleEngine } from './roleSelectorEngine';
-import type { ParsedSelector, ParsedSelectorPart } from '../common/selectorParser';
-import { allEngineNames, parseSelector, stringifySelector } from '../common/selectorParser';
+import type { ParsedSelector, ParsedSelectorPart } from '../isomorphic/selectorParser';
+import { allEngineNames, parseSelector, stringifySelector } from '../isomorphic/selectorParser';
 import type { TextMatcher } from './selectorEvaluator';
 import { SelectorEvaluatorImpl, isVisible, parentElementOrShadowHost, elementMatchesText, createRegexTextMatcher, createStrictTextMatcher, createLaxTextMatcher } from './selectorEvaluator';
-import type { CSSComplexSelectorList } from '../common/cssParser';
+import type { CSSComplexSelectorList } from '../isomorphic/cssParser';
 import { generateSelector } from './selectorGenerator';
 import type * as channels from '../../protocol/channels';
 import { Highlight } from './highlight';
diff --git a/packages/playwright-core/src/server/injected/selectorEvaluator.ts b/packages/playwright-core/src/server/injected/selectorEvaluator.ts
index db036cb0f1..2dac43a688 100644
--- a/packages/playwright-core/src/server/injected/selectorEvaluator.ts
+++ b/packages/playwright-core/src/server/injected/selectorEvaluator.ts
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-import type { CSSComplexSelector, CSSSimpleSelector, CSSComplexSelectorList, CSSFunctionArgument } from '../common/cssParser';
-import { customCSSNames } from '../common/selectorParser';
+import type { CSSComplexSelector, CSSSimpleSelector, CSSComplexSelectorList, CSSFunctionArgument } from '../isomorphic/cssParser';
+import { customCSSNames } from '../isomorphic/selectorParser';
 
 export type QueryContext = {
   scope: Element | Document;
diff --git a/packages/playwright-core/src/server/injected/utilityScript.ts b/packages/playwright-core/src/server/injected/utilityScript.ts
index 8d1a436c44..6da576cd08 100644
--- a/packages/playwright-core/src/server/injected/utilityScript.ts
+++ b/packages/playwright-core/src/server/injected/utilityScript.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { serializeAsCallArgument, parseEvaluationResultValue } from '../common/utilityScriptSerializers';
+import { serializeAsCallArgument, parseEvaluationResultValue } from '../isomorphic/utilityScriptSerializers';
 
 export class UtilityScript {
   evaluate(isFunction: boolean | undefined, returnByValue: boolean, expression: string, argCount: number, ...argsAndHandles: any[]) {
diff --git a/packages/playwright-core/src/server/isomorphic/DEPS.list b/packages/playwright-core/src/server/isomorphic/DEPS.list
new file mode 100644
index 0000000000..c962277084
--- /dev/null
+++ b/packages/playwright-core/src/server/isomorphic/DEPS.list
@@ -0,0 +1,2 @@
+# Files in this folder are used both in Node.js and injected environments, they are isomorphic and can't have dependencies.
+[*]
diff --git a/packages/playwright-core/src/server/common/cssParser.ts b/packages/playwright-core/src/server/isomorphic/cssParser.ts
similarity index 100%
rename from packages/playwright-core/src/server/common/cssParser.ts
rename to packages/playwright-core/src/server/isomorphic/cssParser.ts
diff --git a/packages/playwright-core/src/server/common/cssTokenizer.d.ts b/packages/playwright-core/src/server/isomorphic/cssTokenizer.d.ts
similarity index 100%
rename from packages/playwright-core/src/server/common/cssTokenizer.d.ts
rename to packages/playwright-core/src/server/isomorphic/cssTokenizer.d.ts
diff --git a/packages/playwright-core/src/server/common/cssTokenizer.js b/packages/playwright-core/src/server/isomorphic/cssTokenizer.js
similarity index 100%
rename from packages/playwright-core/src/server/common/cssTokenizer.js
rename to packages/playwright-core/src/server/isomorphic/cssTokenizer.js
diff --git a/packages/playwright-core/src/server/common/selectorParser.ts b/packages/playwright-core/src/server/isomorphic/selectorParser.ts
similarity index 100%
rename from packages/playwright-core/src/server/common/selectorParser.ts
rename to packages/playwright-core/src/server/isomorphic/selectorParser.ts
diff --git a/packages/playwright-core/src/server/common/utilityScriptSerializers.ts b/packages/playwright-core/src/server/isomorphic/utilityScriptSerializers.ts
similarity index 100%
rename from packages/playwright-core/src/server/common/utilityScriptSerializers.ts
rename to packages/playwright-core/src/server/isomorphic/utilityScriptSerializers.ts
diff --git a/packages/playwright-core/src/server/javascript.ts b/packages/playwright-core/src/server/javascript.ts
index 2f409c2fb0..768c89427d 100644
--- a/packages/playwright-core/src/server/javascript.ts
+++ b/packages/playwright-core/src/server/javascript.ts
@@ -16,7 +16,7 @@
 
 import type * as dom from './dom';
 import * as utilityScriptSource from '../generated/utilityScriptSource';
-import { serializeAsCallArgument } from './common/utilityScriptSerializers';
+import { serializeAsCallArgument } from './isomorphic/utilityScriptSerializers';
 import { type UtilityScript } from './injected/utilityScript';
 import { SdkObject } from './instrumentation';
 import { ManualPromise } from '../utils/manualPromise';
diff --git a/packages/playwright-core/src/server/page.ts b/packages/playwright-core/src/server/page.ts
index 2b91818485..f94e044914 100644
--- a/packages/playwright-core/src/server/page.ts
+++ b/packages/playwright-core/src/server/page.ts
@@ -40,8 +40,8 @@ import type { CallMetadata } from './instrumentation';
 import { SdkObject } from './instrumentation';
 import type { Artifact } from './artifact';
 import type { TimeoutOptions } from '../common/types';
-import type { ParsedSelector } from './common/selectorParser';
-import { isInvalidSelectorError } from './common/selectorParser';
+import type { ParsedSelector } from './isomorphic/selectorParser';
+import { isInvalidSelectorError } from './isomorphic/selectorParser';
 
 export interface PageDelegate {
   readonly rawMouse: input.RawMouse;
diff --git a/packages/playwright-core/src/server/screenshotter.ts b/packages/playwright-core/src/server/screenshotter.ts
index 644815f8e1..22bb27466b 100644
--- a/packages/playwright-core/src/server/screenshotter.ts
+++ b/packages/playwright-core/src/server/screenshotter.ts
@@ -20,7 +20,7 @@ import type { Rect } from '../common/types';
 import { helper } from './helper';
 import type { Page } from './page';
 import type { Frame } from './frames';
-import type { ParsedSelector } from './common/selectorParser';
+import type { ParsedSelector } from './isomorphic/selectorParser';
 import type * as types from './types';
 import type { Progress } from './progress';
 import { assert } from '../utils';
diff --git a/packages/playwright-core/src/server/selectors.ts b/packages/playwright-core/src/server/selectors.ts
index 90c4f4d4b7..e1117dd3a2 100644
--- a/packages/playwright-core/src/server/selectors.ts
+++ b/packages/playwright-core/src/server/selectors.ts
@@ -18,8 +18,8 @@ import type * as dom from './dom';
 import type * as frames from './frames';
 import type * as js from './javascript';
 import type * as types from './types';
-import type { ParsedSelector } from './common/selectorParser';
-import { allEngineNames, InvalidSelectorError, parseSelector, stringifySelector } from './common/selectorParser';
+import type { ParsedSelector } from './isomorphic/selectorParser';
+import { allEngineNames, InvalidSelectorError, parseSelector, stringifySelector } from './isomorphic/selectorParser';
 import { createGuid, experimentalFeaturesEnabled } from '../utils';
 
 export type SelectorInfo = {
diff --git a/packages/playwright-core/src/server/supplements/injected/DEPS.list b/packages/playwright-core/src/server/supplements/injected/DEPS.list
index db653ddbcd..d537791e79 100644
--- a/packages/playwright-core/src/server/supplements/injected/DEPS.list
+++ b/packages/playwright-core/src/server/supplements/injected/DEPS.list
@@ -1,3 +1,4 @@
+# Files in this folder are used in browser environment, they can only depend on isomorphic files.
 [*]
 ../../injected/
-../../../utils/
+../../../utils/isomorphic/
diff --git a/packages/playwright-core/src/server/supplements/injected/consoleApi.ts b/packages/playwright-core/src/server/supplements/injected/consoleApi.ts
index 58af20a017..d0a2091b35 100644
--- a/packages/playwright-core/src/server/supplements/injected/consoleApi.ts
+++ b/packages/playwright-core/src/server/supplements/injected/consoleApi.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { escapeWithQuotes } from '../../../utils/stringUtils';
+import { escapeWithQuotes } from '../../../utils/isomorphic/stringUtils';
 import { type InjectedScript } from '../../injected/injectedScript';
 import { generateSelector } from '../../injected/selectorGenerator';
 
diff --git a/packages/playwright-core/src/server/supplements/recorder/DEPS.list b/packages/playwright-core/src/server/supplements/recorder/DEPS.list
index 0746fc118c..1ff4195c4b 100644
--- a/packages/playwright-core/src/server/supplements/recorder/DEPS.list
+++ b/packages/playwright-core/src/server/supplements/recorder/DEPS.list
@@ -1,8 +1,9 @@
 [*]
 ../../
+../../registry/**
 ../../../common/
 ../../../protocol/
-../../../utils/
+../../../utils/**
 
 [recorderApp.ts]
 ../../chromium/crApp.ts
diff --git a/packages/playwright-core/src/server/supplements/recorder/csharp.ts b/packages/playwright-core/src/server/supplements/recorder/csharp.ts
index 57f08259ea..605f0940f1 100644
--- a/packages/playwright-core/src/server/supplements/recorder/csharp.ts
+++ b/packages/playwright-core/src/server/supplements/recorder/csharp.ts
@@ -22,7 +22,7 @@ import type { Action } from './recorderActions';
 import { actionTitle } from './recorderActions';
 import type { MouseClickOptions } from './utils';
 import { toModifiers } from './utils';
-import { escapeWithQuotes } from '../../../utils/stringUtils';
+import { escapeWithQuotes } from '../../../utils/isomorphic/stringUtils';
 import deviceDescriptors from '../../deviceDescriptors';
 
 export class CSharpLanguageGenerator implements LanguageGenerator {
diff --git a/packages/playwright-core/src/server/supplements/recorder/java.ts b/packages/playwright-core/src/server/supplements/recorder/java.ts
index 0ca92d7d31..f1072a897d 100644
--- a/packages/playwright-core/src/server/supplements/recorder/java.ts
+++ b/packages/playwright-core/src/server/supplements/recorder/java.ts
@@ -24,7 +24,7 @@ import type { MouseClickOptions } from './utils';
 import { toModifiers } from './utils';
 import deviceDescriptors from '../../deviceDescriptors';
 import { JavaScriptFormatter } from './javascript';
-import { escapeWithQuotes } from '../../../utils/stringUtils';
+import { escapeWithQuotes } from '../../../utils/isomorphic/stringUtils';
 
 export class JavaLanguageGenerator implements LanguageGenerator {
   id = 'java';
diff --git a/packages/playwright-core/src/server/supplements/recorder/javascript.ts b/packages/playwright-core/src/server/supplements/recorder/javascript.ts
index 916c610a0a..883b4aee98 100644
--- a/packages/playwright-core/src/server/supplements/recorder/javascript.ts
+++ b/packages/playwright-core/src/server/supplements/recorder/javascript.ts
@@ -23,7 +23,7 @@ import { actionTitle } from './recorderActions';
 import type { MouseClickOptions } from './utils';
 import { toModifiers } from './utils';
 import deviceDescriptors from '../../deviceDescriptors';
-import { escapeWithQuotes } from '../../../utils/stringUtils';
+import { escapeWithQuotes } from '../../../utils/isomorphic/stringUtils';
 
 export class JavaScriptLanguageGenerator implements LanguageGenerator {
   id: string;
diff --git a/packages/playwright-core/src/server/supplements/recorder/python.ts b/packages/playwright-core/src/server/supplements/recorder/python.ts
index 56b3aab5f2..da288f7c26 100644
--- a/packages/playwright-core/src/server/supplements/recorder/python.ts
+++ b/packages/playwright-core/src/server/supplements/recorder/python.ts
@@ -22,7 +22,7 @@ import type { Action } from './recorderActions';
 import { actionTitle } from './recorderActions';
 import type { MouseClickOptions } from './utils';
 import { toModifiers } from './utils';
-import { escapeWithQuotes } from '../../../utils/stringUtils';
+import { escapeWithQuotes } from '../../../utils/isomorphic/stringUtils';
 import deviceDescriptors from '../../deviceDescriptors';
 
 export class PythonLanguageGenerator implements LanguageGenerator {
diff --git a/packages/playwright-core/src/server/trace/viewer/DEPS.list b/packages/playwright-core/src/server/trace/viewer/DEPS.list
index 1cebb92f14..89fcbb8161 100644
--- a/packages/playwright-core/src/server/trace/viewer/DEPS.list
+++ b/packages/playwright-core/src/server/trace/viewer/DEPS.list
@@ -1,5 +1,6 @@
 [*]
 ../../
+../../registry/
 ../../../generated/
 ../../../utils/
 ../../chromium/crApp.ts
diff --git a/packages/playwright-core/src/server/webkit/wkExecutionContext.ts b/packages/playwright-core/src/server/webkit/wkExecutionContext.ts
index 2595a09ff9..d1cd048e02 100644
--- a/packages/playwright-core/src/server/webkit/wkExecutionContext.ts
+++ b/packages/playwright-core/src/server/webkit/wkExecutionContext.ts
@@ -18,7 +18,7 @@
 import type { WKSession } from './wkConnection';
 import type { Protocol } from './protocol';
 import * as js from '../javascript';
-import { parseEvaluationResultValue } from '../common/utilityScriptSerializers';
+import { parseEvaluationResultValue } from '../isomorphic/utilityScriptSerializers';
 import { isSessionClosedError } from '../protocolError';
 
 export class WKExecutionContext implements js.ExecutionContextDelegate {
diff --git a/packages/playwright-core/src/utils/stringUtils.ts b/packages/playwright-core/src/utils/isomorphic/stringUtils.ts
similarity index 100%
rename from packages/playwright-core/src/utils/stringUtils.ts
rename to packages/playwright-core/src/utils/isomorphic/stringUtils.ts
diff --git a/tests/library/css-parser.spec.ts b/tests/library/css-parser.spec.ts
index a6b9a2b9d7..bf15922543 100644
--- a/tests/library/css-parser.spec.ts
+++ b/tests/library/css-parser.spec.ts
@@ -15,7 +15,7 @@
  */
 
 import { playwrightTest as it, expect } from '../config/browserTest';
-import { parseCSS, serializeSelector as serialize } from '../../packages/playwright-core/lib/server/common/cssParser';
+import { parseCSS, serializeSelector as serialize } from '../../packages/playwright-core/lib/server/isomorphic/cssParser';
 
 const parse = (selector: string) => {
   return parseCSS(selector, new Set(['text', 'not', 'has', 'react', 'scope', 'right-of', 'is'])).selector;
diff --git a/utils/check_deps.js b/utils/check_deps.js
index 203e515d9b..fc98b50e2b 100644
--- a/utils/check_deps.js
+++ b/utils/check_deps.js
@@ -138,7 +138,9 @@ async function innerCheckDeps(root, checkDepsFile, checkPackageJson) {
 
   function allowImport(from, to) {
     const fromDirectory = path.dirname(from);
-    const toDirectory = path.dirname(to);
+    const toDirectory = isDirectory(to) ? to : path.dirname(to);
+    if (to === toDirectory)
+      to = path.join(to, 'index.ts');
     if (fromDirectory === toDirectory)
       return true;
 
@@ -217,3 +219,7 @@ checkDeps().catch(e => {
   console.error(e && e.stack ? e.stack : e);
   process.exit(1);
 });
+
+function isDirectory(dir) {
+  return fs.existsSync(dir) && fs.statSync(dir).isDirectory();
+}
\ No newline at end of file