diff --git a/docs/errata/README.md b/docs/errata/README.md
index 5852394..d0857a2 100644
--- a/docs/errata/README.md
+++ b/docs/errata/README.md
@@ -2,7 +2,7 @@
 
 If you find any mistakes in the seventh edition, *C# 11 and .NET 7 - Modern Cross-Platform Development Fundamentals*, or if you have suggestions for improvements, then please [raise an issue in this repository](https://github.com/markjprice/cs11dotnet7/issues) or email me at markjprice (at) gmail.com.
 
-[**Errata** (8 items)](errata.md): Typos, tool user interface changes, or mistakes in code that would cause a compilation error that prevents a successful build.
+[**Errata** (9 items)](errata.md): Typos, tool user interface changes, or mistakes in code that would cause a compilation error that prevents a successful build.
 
 [**Improvements** (1 item)](improvements.md): Changes to text or code that would improve the content. These are optional.
 
diff --git a/docs/errata/errata.md b/docs/errata/errata.md
index b852a9f..ade8a80 100644
--- a/docs/errata/errata.md
+++ b/docs/errata/errata.md
@@ -1,4 +1,4 @@
-**Errata** (8 items)
+**Errata** (9 items)
 
 If you find any mistakes, then please [raise an issue in this repository](https://github.com/markjprice/cs11dotnet7/issues) or email me at markjprice (at) gmail.com.
 
@@ -9,6 +9,7 @@ If you find any mistakes, then please [raise an issue in this repository](https:
 - [Page 37 - Getting definitions of types and their members](#page-37---getting-definitions-of-types-and-their-members)
 - [Page 83 - Formatting using numbered positional arguments](#page-83---formatting-using-numbered-positional-arguments)
 - [Page 86 - Getting text input from the user](#page-86---getting-text-input-from-the-user)
+- [Page 185 - Creating a class library that needs testing](#page-185---creating-a-class-library-that-needs-testing)
 - [Page 188 - Running unit tests using Visual Studio Code](#page-188---running-unit-tests-using-visual-studio-code)
 - [Page 244 - Init-only properties](#page-244---init-only-properties)
 - [Page 322 - Revealing the location of a type](#page-322---revealing-the-location-of-a-type)
@@ -78,6 +79,10 @@ Console.WriteLine(
 
 In Step 3, I wrote, "For the `firstName` variable" when I should have written, "For the `age` variable".
 
+# Page 185 - Creating a class library that needs testing
+
+In the "If you are using Visual Studio Code" section, in Step 5, the command in the book is `dotnet new console` but it should have been `dotnet new classlib`.
+
 # Page 188 - Running unit tests using Visual Studio Code
 
 > Thanks to [kwatsonkairosmgt](https://github.com/kwatsonkairosmgt) for raising this [issue on 27 October 2022](https://github.com/markjprice/cs10dotnet6/issues/106).