diff --git a/packages/css-tokenizer/test/css-tokenizer/at-keyword-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/at-keyword-token.test.ts
index 486648fe6..27c599d11 100644
--- a/packages/css-tokenizer/test/css-tokenizer/at-keyword-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/at-keyword-token.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('at-keyword-token', () => {
     test.each(addAsProp([
@@ -20,9 +18,5 @@ describe('at-keyword-token', () => {
                 [TokenType.Semicolon, 16, 17],
             ],
         },
-    ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/cdo-and-cdc-tokens.test.ts b/packages/css-tokenizer/test/css-tokenizer/cdo-and-cdc-tokens.test.ts
index 8bd70360e..46b209dfc 100644
--- a/packages/css-tokenizer/test/css-tokenizer/cdo-and-cdc-tokens.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/cdo-and-cdc-tokens.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import { type TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('cdo-token and cdc-token', () => {
     test.each(addAsProp([
@@ -17,9 +15,5 @@ describe('cdo-token and cdc-token', () => {
                 [TokenType.Cdc, 0, 3],
             ],
         },
-    ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/comment-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/comment-token.test.ts
index 160828907..480c1a671 100644
--- a/packages/css-tokenizer/test/css-tokenizer/comment-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/comment-token.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('comment-token', () => {
     test.each(addAsProp([
@@ -46,9 +44,5 @@ describe('comment-token', () => {
                 [TokenType.Comment, 32, 44],
             ],
         },
-    ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/delim-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/delim-token.test.ts
index ba84acf35..ba4b4312e 100644
--- a/packages/css-tokenizer/test/css-tokenizer/delim-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/delim-token.test.ts
@@ -1,7 +1,6 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import type { TokenTest } from '../helpers/test-interfaces';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('delim-token', () => {
     // Tokenize any unknown character as <delim-token>
@@ -19,11 +18,7 @@ describe('delim-token', () => {
                     [TokenType.Delim, 0, 1],
                 ],
             },
-        ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
     });
 
     describe("should tokenize '#' as <delim-token> if it isn't followed by a name or a hex digit", () => {
@@ -49,11 +44,7 @@ describe('delim-token', () => {
                     [TokenType.Number, 2, 3],
                 ],
             },
-        ])("should tokenize '#' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '#' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '+' as <delim-token> if it isn't a part of a number", () => {
@@ -79,11 +70,7 @@ describe('delim-token', () => {
                     [TokenType.Number, 2, 3],
                 ],
             },
-        ])("should tokenize '+' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '+' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '-' as <delim-token> if it isn't a part of a number, CDC or ident", () => {
@@ -117,11 +104,7 @@ describe('delim-token', () => {
                     [TokenType.Ident, 2, 3],
                 ],
             },
-        ])("should tokenize '-' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '-' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '.' as <delim-token> if it isn't a part of a number", () => {
@@ -147,11 +130,7 @@ describe('delim-token', () => {
                     [TokenType.Number, 2, 3],
                 ],
             },
-        ])("should tokenize '.' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '.' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '<' as <delim-token> if it isn't a part of a CDO", () => {
@@ -178,11 +157,7 @@ describe('delim-token', () => {
                     [TokenType.Ident, 3, 5],
                 ],
             },
-        ])("should tokenize '<' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '<' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '@' as <delim-token> if it isn't a part of an at-keyword", () => {
@@ -208,11 +183,7 @@ describe('delim-token', () => {
                     [TokenType.Ident, 2, 9],
                 ],
             },
-        ])("should tokenize '@' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '@' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '/' as <delim-token> if it isn't a part of a comment mark", () => {
@@ -238,11 +209,7 @@ describe('delim-token', () => {
                     [TokenType.Delim, 2, 3],
                 ],
             },
-        ])("should tokenize '/' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '/' as <delim-token> in '$actual'", testTokenization);
     });
 
     describe("should tokenize '\\' as <delim-token> if it isn't a valid escape", () => {
@@ -254,10 +221,6 @@ describe('delim-token', () => {
                     [TokenType.Whitespace, 1, 2],
                 ],
             },
-        ])("should tokenize '\\' as <delim-token> in '$actual'", ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ] as TokenTest[])("should tokenize '\\' as <delim-token> in '$actual'", testTokenization);
     });
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/hash-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/hash-token.test.ts
index ca3df9ffb..50621e518 100644
--- a/packages/css-tokenizer/test/css-tokenizer/hash-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/hash-token.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('hash-token', () => {
     test.each(addAsProp([
@@ -17,9 +15,5 @@ describe('hash-token', () => {
                 [TokenType.Hash, 0, 10],
             ],
         },
-    ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/numeric-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/numeric-token.test.ts
index abdb56692..63404f51f 100644
--- a/packages/css-tokenizer/test/css-tokenizer/numeric-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/numeric-token.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('numeric-token', () => {
     // Test data from https://developer.mozilla.org/en-US/docs/Web/CSS/number
@@ -63,9 +61,5 @@ describe('numeric-token', () => {
                 [TokenType.Dimension, 0, value.length + 3],
             ],
         }))),
-    ])('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ])('should tokenize \'$actual\' as \'$as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/string-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/string-token.test.ts
index d32d34664..f25184c79 100644
--- a/packages/css-tokenizer/test/css-tokenizer/string-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/string-token.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('string-token and bad-string-token', () => {
     test.each(addAsProp([
@@ -111,9 +109,5 @@ describe('string-token and bad-string-token', () => {
                 [TokenType.String, 0, 10],
             ],
         },
-    ]))('should tokenize $actual as $as', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize $actual as $as', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/trivial-tokens.test.ts b/packages/css-tokenizer/test/css-tokenizer/trivial-tokens.test.ts
index 3a41a9c57..5a52fbc3a 100644
--- a/packages/css-tokenizer/test/css-tokenizer/trivial-tokens.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/trivial-tokens.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('trivial tokens', () => {
     test.each(addAsProp([
@@ -59,9 +57,5 @@ describe('trivial tokens', () => {
                 [TokenType.Semicolon, 0, 1],
             ],
         },
-    ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/css-tokenizer/url-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/url-token.test.ts
index 8fc8a98a3..e4800fb90 100644
--- a/packages/css-tokenizer/test/css-tokenizer/url-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/url-token.test.ts
@@ -2,7 +2,7 @@ import { CodePoint } from '../../src/common/enums/code-points';
 import { TokenType } from '../../src/common/enums/token-types';
 import { tokenize } from '../../src/css-tokenizer';
 import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('URLs', () => {
     describe('should tokenize valid inputs as <url-token>', () => {
@@ -126,11 +126,7 @@ describe('URLs', () => {
                     [TokenType.CloseParenthesis, 24, 25],
                 ],
             },
-        ]))('should tokenize \'$actual\' as \'$as\'', ({ actual, expected }) => {
-            const tokens: TokenData[] = [];
-            tokenize(actual, (...args) => tokens.push(args));
-            expect(tokens).toEqual(expected);
-        });
+        ]))('should tokenize \'$actual\' as \'$as\'', testTokenization);
     });
 
     describe('should tokenize invalid inputs as <bad-url-token>', () => {
diff --git a/packages/css-tokenizer/test/css-tokenizer/whitespace-token.test.ts b/packages/css-tokenizer/test/css-tokenizer/whitespace-token.test.ts
index 97bb6d510..39b8b12f4 100644
--- a/packages/css-tokenizer/test/css-tokenizer/whitespace-token.test.ts
+++ b/packages/css-tokenizer/test/css-tokenizer/whitespace-token.test.ts
@@ -1,7 +1,5 @@
 import { TokenType } from '../../src/common/enums/token-types';
-import { tokenize } from '../../src/css-tokenizer';
-import type { TokenData } from '../helpers/test-interfaces';
-import { addAsProp } from '../helpers/test-utils';
+import { addAsProp, testTokenization } from '../helpers/test-utils';
 
 describe('whitespace', () => {
     test.each(addAsProp([
@@ -54,9 +52,5 @@ describe('whitespace', () => {
                 [TokenType.Whitespace, 0, 2],
             ],
         },
-    ]))('should tokenize \'$name\' as \'as\'', ({ actual, expected }) => {
-        const tokens: TokenData[] = [];
-        tokenize(actual, (...args) => tokens.push(args));
-        expect(tokens).toEqual(expected);
-    });
+    ]))('should tokenize \'$name\' as \'as\'', testTokenization);
 });
diff --git a/packages/css-tokenizer/test/helpers/test-utils.ts b/packages/css-tokenizer/test/helpers/test-utils.ts
index dcb8f5dd4..2fcba1081 100644
--- a/packages/css-tokenizer/test/helpers/test-utils.ts
+++ b/packages/css-tokenizer/test/helpers/test-utils.ts
@@ -1,6 +1,8 @@
 import { getFormattedTokenName } from '../../src/utils/token-names';
 import { type TokenType } from '../../src/common/enums/token-types';
-import { type TokenTest } from './test-interfaces';
+import { type TokenData, type TokenTest } from './test-interfaces';
+import { tokenize } from '../../src/css-tokenizer';
+import { type tokenizeExtended } from '../../src/extended-css-tokenizer';
 
 const SEPARATOR = ', ';
 
@@ -29,3 +31,15 @@ export const addAsProp = (tests: TokenTest[]): TokenTest[] => {
 
     return tests;
 };
+
+/**
+ * Helper function to test tokenization, it is enough in most cases.
+ *
+ * @param test Token test
+ * @param fn Tokenizer function
+ */
+export const testTokenization = (test: TokenTest, fn: typeof tokenize | typeof tokenizeExtended = tokenize): void => {
+    const tokens: TokenData[] = [];
+    fn(test.actual, (...args) => tokens.push(args));
+    expect(tokens).toEqual(test.expected);
+};