diff --git a/docs/INSTALLATION.md b/docs/INSTALLATION.md
index 398ff218a..404d170f1 100644
--- a/docs/INSTALLATION.md
+++ b/docs/INSTALLATION.md
@@ -137,3 +137,28 @@ composer global require phpunit/phpunit ^11.5
 ```
 
 Please make sure you install version 11.5 or later.
+
+## Useable Modules
+
+- Core, standard (providing very common functions like [array](https://www.php.net/manual/en/ref.array.php) or [string](https://www.php.net/manual/en/ref.strings.php) functions)
+- [ctype](https://www.php.net/manual/en/book.ctype.php)
+- [date](https://www.php.net/manual/en/book.datetime.php)
+- [dom](https://www.php.net/manual/en/book.dom.php)
+- [fileinfo](https://www.php.net/manual/en/book.fileinfo.php)
+- [filter](https://www.php.net/manual/en/book.filter.php)
+- [hash](https://www.php.net/manual/en/book.hash.php)
+- [iconv](https://www.php.net/manual/en/book.iconv.php)
+- [json](https://www.php.net/manual/en/book.json.php)
+- [libxml](https://www.php.net/manual/en/book.libxml.php)
+- [mbstring](https://www.php.net/manual/en/book.mbstring.php)
+- [pcre](https://www.php.net/manual/en/book.pcre.php)
+- [random](https://www.php.net/manual/en/book.random.php)
+- [Reflection](https://www.php.net/manual/en/book.reflection.php)
+- [SimpleXML](https://www.php.net/manual/en/book.simplexml.php)
+- [sodium](https://www.php.net/manual/en/book.sodium.php)
+- [SPL](https://www.php.net/manual/en/book.spl.php)
+- [tokenizer](https://www.php.net/manual/en/book.tokenizer.php)
+- [xml](https://www.php.net/manual/en/refs.xml.php)
+- [xmlreader](https://www.php.net/manual/en/book.xmlreader.php)
+- [xmlwriter](https://www.php.net/manual/en/book.xmlwriter.php)
+- [zlib](https://www.php.net/manual/en/book.zlib.php)
\ No newline at end of file
diff --git a/docs/TESTS.md b/docs/TESTS.md
index a0f3b7e39..86a67e412 100644
--- a/docs/TESTS.md
+++ b/docs/TESTS.md
@@ -11,3 +11,28 @@ For example, to run the tests for the Hello World exercise, you would run:
 ```shell
 phpunit HelloWorldTest.php
 ```
+
+## Useable Modules:
+
+- Core, standard (providing very common functions like [array](https://www.php.net/manual/en/ref.array.php) or [string](https://www.php.net/manual/en/ref.strings.php) functions)
+- [ctype](https://www.php.net/manual/en/book.ctype.php)
+- [date](https://www.php.net/manual/en/book.datetime.php)
+- [dom](https://www.php.net/manual/en/book.dom.php)
+- [fileinfo](https://www.php.net/manual/en/book.fileinfo.php)
+- [filter](https://www.php.net/manual/en/book.filter.php)
+- [hash](https://www.php.net/manual/en/book.hash.php)
+- [iconv](https://www.php.net/manual/en/book.iconv.php)
+- [json](https://www.php.net/manual/en/book.json.php)
+- [libxml](https://www.php.net/manual/en/book.libxml.php)
+- [mbstring](https://www.php.net/manual/en/book.mbstring.php)
+- [pcre](https://www.php.net/manual/en/book.pcre.php)
+- [random](https://www.php.net/manual/en/book.random.php)
+- [Reflection](https://www.php.net/manual/en/book.reflection.php)
+- [SimpleXML](https://www.php.net/manual/en/book.simplexml.php)
+- [sodium](https://www.php.net/manual/en/book.sodium.php)
+- [SPL](https://www.php.net/manual/en/book.spl.php)
+- [tokenizer](https://www.php.net/manual/en/book.tokenizer.php)
+- [xml](https://www.php.net/manual/en/refs.xml.php)
+- [xmlreader](https://www.php.net/manual/en/book.xmlreader.php)
+- [xmlwriter](https://www.php.net/manual/en/book.xmlwriter.php)
+- [zlib](https://www.php.net/manual/en/book.zlib.php)
\ No newline at end of file