diff --git a/test/fixtures/cnb/ruby/download.md b/test/fixtures/cnb/ruby/download.md
index 57c87b9..f1907c0 100644
--- a/test/fixtures/cnb/ruby/download.md
+++ b/test/fixtures/cnb/ruby/download.md
@@ -14,3 +14,9 @@ Verify you're in the correct directory:
 ```
 :::>> $ ls
 ```
+
+This tutorial was built using the following commit SHA:
+
+```
+:::>> $ git log --oneline | head -n1
+```
diff --git a/test/fixtures/cnb/shared/install_pack.md b/test/fixtures/cnb/shared/install_pack.md
index c1d0a2c..7d7118f 100644
--- a/test/fixtures/cnb/shared/install_pack.md
+++ b/test/fixtures/cnb/shared/install_pack.md
@@ -6,7 +6,7 @@ We assume you have [docker installed](https://docs.docker.com/engine/install/) a
 :::>- $ brew install buildpacks/tap/pack
 ```
 
-Ensure that it is installed correctly:
+Ensure that `pack` is installed correctly:
 
 ```
 :::>> $ pack --version
diff --git a/test/fixtures/cnb/shared/pack_build.md b/test/fixtures/cnb/shared/pack_build.md
index 711e9e6..c44254e 100644
--- a/test/fixtures/cnb/shared/pack_build.md
+++ b/test/fixtures/cnb/shared/pack_build.md
@@ -4,8 +4,8 @@ Now build an image named `my-image-name` by executing the heroku builder against
 `pack build` command:
 
 ```
-:::-- $ docker rmi -f my-image-name
 $ pack build my-image-name --path .
+:::-- $ docker rmi -f my-image-name
 :::-- $ pack build my-image-name --path . &> build_output.txt
 :::-> $ cat build_output.txt
 ```
diff --git a/test/fixtures/cnb/shared/use_the_image.md b/test/fixtures/cnb/shared/use_the_image.md
index 4b6a3ca..e591eaa 100644
--- a/test/fixtures/cnb/shared/use_the_image.md
+++ b/test/fixtures/cnb/shared/use_the_image.md
@@ -5,7 +5,8 @@ Even though we used `pack` and CNBs to build our image, it can be run with your
 By default, images will be booted into a web server configuration. You can launch the app we just built by running:
 
 ```
-:::>> background.start("docker run -it --rm --env PORT=9292 -p 9292:9292 my-image-name", name: "docker_server")
+$ docker run -it --rm --platform linux/amd64 --env PORT=9292 -p 9292:9292 my-image-name
+:::-> background.start("docker run --rm --platform linux/amd64 --env PORT=9292 -p 9292:9292 my-image-name", name: "docker_server")
 :::-- $ sleep 10
 :::-> background.log.read(name: "docker_server")
 ```
diff --git a/test/fixtures/cnb/shared/what_is_a_builder.md b/test/fixtures/cnb/shared/what_is_a_builder.md
index 6182584..662f79d 100644
--- a/test/fixtures/cnb/shared/what_is_a_builder.md
+++ b/test/fixtures/cnb/shared/what_is_a_builder.md
@@ -16,3 +16,12 @@ You can view the contents of a builder via the command `pack builder inspect`. F
 > Your output version numbers may differ.
 
 This output shows the various buildpacks that represent the different languages that are supported by this builder such as `heroku/go` and `heroku/nodejs-engine`.
+
+
+<!--
+Debug: Output the SHA of the builder:
+
+```
+:::>> $ docker inspect --format='{{index .RepoDigests 0}}' heroku/builder:22
+```
+-->