diff --git a/docs/deployment/builders/cloud-native-buildpacks.md b/docs/deployment/builders/cloud-native-buildpacks.md
index 9381d548e..f39df23f1 100644
--- a/docs/deployment/builders/cloud-native-buildpacks.md
+++ b/docs/deployment/builders/cloud-native-buildpacks.md
@@ -147,7 +147,7 @@ project2.toml
 > [!IMPORTANT]
 > New as of 0.23.0
 
-The default stack builder in use by CNB buildpacks in Dokku is based on `heroku/builder:22`. Users may desire to switch the stack builder to a custom version, either to update the operating system or to customize packages included with the stack builder. This can be performed via the `buildpacks:set-property` command.
+The default stack builder in use by CNB buildpacks in Dokku is based on `heroku/builder:24`. Users may desire to switch the stack builder to a custom version, either to update the operating system or to customize packages included with the stack builder. This can be performed via the `buildpacks:set-property` command.
 
 ```shell
 dokku buildpacks:set-property node-js-app stack paketobuildpacks/build:base-cnb
@@ -161,7 +161,7 @@ dokku buildpacks:set-property node-js-app stack
 
 A change in the stack builder value will execute the `post-stack-set` trigger.
 
-Finally, stack builders can be set or unset globally as a fallback. This will take precedence over a globally set `DOKKU_CNB_BUILDER` environment variable (`heroku/builder:22` by default).
+Finally, stack builders can be set or unset globally as a fallback. This will take precedence over a globally set `DOKKU_CNB_BUILDER` environment variable (`heroku/builder:24` by default).
 
 ```shell
 # set globally
diff --git a/dokku b/dokku
index 88c91825b..cd8a381a4 100755
--- a/dokku
+++ b/dokku
@@ -40,7 +40,7 @@ DOKKU_DISTRO=$(
 export DOCKER_BIN=${DOCKER_BIN:="docker"}
 
 export DOKKU_IMAGE=${DOKKU_IMAGE:="gliderlabs/herokuish:latest-24"}
-export DOKKU_CNB_BUILDER=${DOKKU_CNB_BUILDER:="heroku/builder:22"}
+export DOKKU_CNB_BUILDER=${DOKKU_CNB_BUILDER:="heroku/builder:24"}
 export DOKKU_LIB_ROOT=${DOKKU_LIB_PATH:="/var/lib/dokku"}
 
 export PLUGIN_PATH=${PLUGIN_PATH:="$DOKKU_LIB_ROOT/plugins"}
diff --git a/tests/apps/python/app-cnb.json b/tests/apps/python/app-cnb.json
new file mode 100644
index 000000000..85f5fe7f0
--- /dev/null
+++ b/tests/apps/python/app-cnb.json
@@ -0,0 +1,21 @@
+{
+  "healthchecks": {
+    "web": [
+      {
+        "attempts": 2,
+        "content": "python/http.server",
+        "name": "check-1",
+        "path": "/",
+        "timeout": 5,
+        "type": "startup",
+        "wait": 2
+      }
+    ]
+  },
+  "scripts": {
+    "dokku": {
+      "postdeploy": "touch /workspace/postdeploy.test",
+      "predeploy": "touch /workspace/predeploy.test"
+    }
+  }
+}
\ No newline at end of file
diff --git a/tests/apps/python/project2.toml b/tests/apps/python/project2.toml
index 6fc93db10..67df953e6 100644
--- a/tests/apps/python/project2.toml
+++ b/tests/apps/python/project2.toml
@@ -9,6 +9,8 @@ uri = "./cnb/1"
 [[build.buildpacks]]
 uri = "./cnb/1"
 
+[[build.buildpacks]]
+uri = "gcr.io/paketo-buildpacks/python"
 
 [[order.group]]
 uri = "gcr.io/paketo-buildpacks/procfile"
diff --git a/tests/apps/python/release.py b/tests/apps/python/release.py
index 117710e9f..741d9edb7 100644
--- a/tests/apps/python/release.py
+++ b/tests/apps/python/release.py
@@ -5,7 +5,8 @@ import os
 def main():
     print("GLOBAL_SECRET: {0}".format(os.getenv('GLOBAL_SECRET')))
     print("SECRET_KEY: {0}".format(os.getenv('SECRET_KEY')))
-    with open("/app/.env", "r") as f:
+    app_dir = os.getcwd()
+    with open(f"{app_dir}/.env", "r") as f:
         for line in f.readlines():
             if "DOTENV_KEY" in line:
                 print(line)
diff --git a/tests/unit/builder-pack.bats b/tests/unit/builder-pack.bats
index 51a20c2e8..551db0901 100644
--- a/tests/unit/builder-pack.bats
+++ b/tests/unit/builder-pack.bats
@@ -25,12 +25,12 @@ teardown() {
   echo "status: $status"
   assert_success
 
-  run /bin/bash -c "dokku buildpacks:set-property $TEST_APP stack heroku/builder:22"
+  run /bin/bash -c "dokku buildpacks:set-property $TEST_APP stack heroku/builder:24"
   echo "output: $output"
   echo "status: $status"
   assert_success
 
-  run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP inject_requirements_txt
+  run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP initialize_for_cnb
   echo "output: $output"
   echo "status: $status"
   assert_success
@@ -81,9 +81,10 @@ teardown() {
   assert_success
 }
 
-inject_requirements_txt() {
+initialize_for_cnb() {
   local APP="$1"
   local APP_REPO_DIR="$2"
   [[ -z "$APP" ]] && local APP="$TEST_APP"
   echo "flask" >>"$APP_REPO_DIR/requirements.txt"
+  mv "$APP_REPO_DIR/app-cnb.json" "$APP_REPO_DIR/app.json"
 }