chore(e2e): fix the e2e test

packages/e2e-test/src/commands/run.ts

@@ -56,7 +56,7 @@ export async function run() {
   const pluginName = await createPlugin('test-plugin', appDir);
 
   print('Creating a Backstage Backend Plugin');
-  await createPlugin('test-backend-plugin', appDir, ['--backend']);
+  await createPlugin('test-plugin', appDir, ['--backend']);
 
   print('Starting the app');
   await testAppServe(pluginName, appDir);
@@ -265,13 +265,16 @@ async function createPlugin(
     print('Waiting for plugin create script to be done');
     await waitForExit(child);
 
-    const pluginDir = resolvePath(appDir, 'plugins', pluginName);
+    const canonicalName = options.includes('--backend')
+      ? `${pluginName}-backend}`
+      : pluginName;
+    const pluginDir = resolvePath(appDir, 'plugins', canonicalName);
     for (const cmd of [['tsc'], ['lint'], ['test', '--no-watch']]) {
       print(`Running 'yarn ${cmd.join(' ')}' in newly created plugin`);
       await runPlain(['yarn', ...cmd], { cwd: pluginDir });
     }
 
-    return pluginName;
+    return canonicalName;
   } finally {
     child.kill();
   }