diff --git a/tests/apps/python/app-heroku-postdeploy.json b/tests/apps/python/app-heroku-postdeploy.json
new file mode 100644
index 000000000..0daee49b0
--- /dev/null
+++ b/tests/apps/python/app-heroku-postdeploy.json
@@ -0,0 +1,24 @@
+{
+  "healthchecks": {
+    "web": [
+      {
+        "attempts": 2,
+        "content": "python/http.server",
+        "name": "check-1",
+        "path": "/",
+        "timeout": 5,
+        "type": "startup",
+        "wait": 2
+      }
+    ]
+  },
+  "scripts": {
+    "dokku": {
+      // this is a comment for the postdeploy script
+      "postdeploy": "touch /app/postdeploy.test",
+      // this is a comment for the predeploy script
+      "predeploy": "touch /app/predeploy.test"
+    },
+    "postdeploy": "touch /app/heroku-postdeploy.test"
+  }
+}
\ No newline at end of file
diff --git a/tests/unit/app-json.bats b/tests/unit/app-json.bats
index ba8325f6a..4c899d979 100644
--- a/tests/unit/app-json.bats
+++ b/tests/unit/app-json.bats
@@ -47,7 +47,12 @@ teardown() {
 }
 
 @test "(app-json) app.json scripts postdeploy" {
-  run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP add_postdeploy_command
+  run /bin/bash -c "dokku app-json:set $TEST_APP appjson-path app-heroku-postdeploy.json"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP
   echo "output: $output"
   echo "status: $status"
   assert_success
diff --git a/tests/unit/test_helper.bash b/tests/unit/test_helper.bash
index 06546ce70..37e71d38a 100644
--- a/tests/unit/test_helper.bash
+++ b/tests/unit/test_helper.bash
@@ -561,15 +561,6 @@ add_release_command() {
   echo "release: touch /app/release.test" >>"$APP_REPO_DIR/Procfile"
 }
 
-add_postdeploy_command() {
-  local APP="$1"
-  local APP_REPO_DIR="$2"
-  [[ -z "$APP" ]] && local APP="$TEST_APP"
-  touch "$APP_REPO_DIR/app.json"
-  contents=$(jq '.scripts.postdeploy = "touch /app/heroku-postdeploy.test"' "$APP_REPO_DIR/app.json")
-  echo "${contents}" >"$APP_REPO_DIR/app.json"
-}
-
 move_dockerfile_into_place() {
   local APP="$1"
   local APP_REPO_DIR="$2"