diff --git a/package-lock.json b/package-lock.json
index 3578ca89..5e04c8e2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -106,8 +106,7 @@
         "sass-loader": "^13.3.2",
         "stylelint": "15.11.0",
         "ts-jest": "^27.0.7",
-        "typescript": "^4.5.2",
-        "web-streams-polyfill": "4.0.0"
+        "typescript": "^4.5.2"
       },
       "peerDependencies": {
         "@diplodoc/cut-extension": "^0.3.1",
@@ -28587,15 +28586,6 @@
         "defaults": "^1.0.3"
       }
     },
-    "node_modules/web-streams-polyfill": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-4.0.0.tgz",
-      "integrity": "sha512-0zJXHRAYEjM2tUfZ2DiSOHAa2aw1tisnnhU3ufD57R8iefL+DcdJyRBRyJpG+NUimDgbTI/lH+gAE1PAvV3Cgw==",
-      "dev": true,
-      "engines": {
-        "node": ">= 8"
-      }
-    },
     "node_modules/web-worker": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/web-worker/-/web-worker-1.3.0.tgz",
diff --git a/package.json b/package.json
index abbdb117..7f71b1d9 100644
--- a/package.json
+++ b/package.json
@@ -254,8 +254,7 @@
     "sass-loader": "^13.3.2",
     "stylelint": "15.11.0",
     "ts-jest": "^27.0.7",
-    "typescript": "^4.5.2",
-    "web-streams-polyfill": "4.0.0"
+    "typescript": "^4.5.2"
   },
   "peerDependenciesMeta": {
     "@diplodoc/folding-headings-extension": {
diff --git a/tests/pollyfills.ts b/tests/pollyfills.ts
new file mode 100644
index 00000000..03853a3e
--- /dev/null
+++ b/tests/pollyfills.ts
@@ -0,0 +1,30 @@
+/* eslint-disable @typescript-eslint/no-redeclare */
+import {Blob} from 'node:buffer';
+import {ReadableStream} from 'node:stream/web';
+import {TextDecoder, TextEncoder} from 'node:util';
+
+Object.assign(global, {Blob, ReadableStream, TextDecoder, TextEncoder});
+
+// fix from https://github.com/jsdom/jsdom/issues/3002
+document.createRange = () => {
+    const range = new Range();
+    range.getBoundingClientRect = () => ({
+        x: 0,
+        y: 0,
+        width: 0,
+        height: 0,
+        top: 0,
+        right: 0,
+        bottom: 0,
+        left: 0,
+        toJSON() {
+            return JSON.stringify(this);
+        },
+    });
+    range.getClientRects = () => ({
+        length: 0,
+        item: () => null,
+        [Symbol.iterator]: jest.fn(),
+    });
+    return range;
+};
diff --git a/tests/setup.ts b/tests/setup.ts
index 444f4df3..dc40722b 100644
--- a/tests/setup.ts
+++ b/tests/setup.ts
@@ -1,33 +1,2 @@
-import {TextDecoder as TextDecoderUtil, TextEncoder as TextEncoderUtil} from 'util';
-
-import {ReadableStream as ReadableStreamPolyfill} from 'web-streams-polyfill';
-
+import './pollyfills';
 import './toMatchNode';
-
-global.TextDecoder = TextDecoderUtil as any; // TS error in global.TextDecoder
-global.TextEncoder = TextEncoderUtil;
-global.ReadableStream = ReadableStreamPolyfill;
-
-// fix from https://github.com/jsdom/jsdom/issues/3002
-document.createRange = () => {
-    const range = new Range();
-    range.getBoundingClientRect = () => ({
-        x: 0,
-        y: 0,
-        width: 0,
-        height: 0,
-        top: 0,
-        right: 0,
-        bottom: 0,
-        left: 0,
-        toJSON() {
-            return JSON.stringify(this);
-        },
-    });
-    range.getClientRects = () => ({
-        length: 0,
-        item: () => null,
-        [Symbol.iterator]: jest.fn(),
-    });
-    return range;
-};