diff --git a/dist/index.js b/dist/index.js
index 6deb35a..fbdabbd 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -13410,6 +13410,7 @@ function parse(commitMessage, branchName, mainBranch) {
     const yamlFragment = commitMessage.match(/^-{3}\n(?<dependencies>[\S|\s]*?)\n^\.{3}\n/m);
     if ((yamlFragment === null || yamlFragment === void 0 ? void 0 : yamlFragment.groups) && branchName.startsWith('dependabot')) {
         const data = yaml.parse(yamlFragment.groups.dependencies);
+        // Since we are on the `dependabot` branch (9 letters), the 10th letter in the branch name is the delimiter
         const delim = branchName[10];
         const chunks = branchName.split(delim);
         const dirname = chunks.slice(2, -1).join(delim) || '/';
diff --git a/src/dry-run.ts b/src/dry-run.ts
index ddcf7a8..f9597d1 100755
--- a/src/dry-run.ts
+++ b/src/dry-run.ts
@@ -7,7 +7,7 @@ import { hideBin } from 'yargs/helpers'
 
 import { getMessage } from './dependabot/verified_commits'
 import { parse } from './dependabot/update_metadata'
-import { parseNwo } from './dependabot/util'
+import { getBranchNames, parseNwo } from './dependabot/util'
 
 async function check (args: any): Promise<void> {
   try {
@@ -42,8 +42,9 @@ async function check (args: any): Promise<void> {
 
     if (commitMessage) {
       console.log('This appears to be a valid Dependabot Pull Request.')
+      const branchNames = getBranchNames(github.context)
 
-      const updatedDependencies = parse(commitMessage, 'dependabot/test_ecosystem/test_directory', 'test_branch')
+      const updatedDependencies = parse(commitMessage, branchNames.headName, branchNames.baseName)
 
       if (updatedDependencies.length > 0) {
         console.log('Updated dependencies:')