Need to set committer, not author

Author: mcmire

tests/helpers/local-repo.ts

@@ -105,6 +105,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
    * `createInitialCommit: true`.
    */
   protected async afterInitialize() {
+    await super.afterInitialize();
+
     if (this.#createInitialCommit) {
       await this.createCommit('Initial commit');
     }

tests/helpers/repo.ts

@@ -165,13 +165,7 @@ export default abstract class Repo {
       await sleepFor(MIN_TIME_BETWEEN_COMMITS - timeSincePreviousCommit);
     }
     await this.runCommand('git', ['add', '-A']);
-    const result = await this.runCommand('git', [
-      'commit',
-      '--author',
-      'Test User <test@example.com>',
-      '--message',
-      message,
-    ]);
+    const result = await this.runCommand('git', ['commit', '-m', message]);
     this.#latestCommitTime = now;
     return result;
   }
@@ -235,10 +229,12 @@ export default abstract class Repo {
 
   /**
    * Custom logic with which to further initialize the repo after it is created.
+   * By default, this configures Git to use an email and name for commits.
    * Can be overridden in subclasses.
    */
   protected async afterInitialize(): Promise<void> {
-    // no-op
+    await this.runCommand('git', ['config', 'user.email', 'test@example.com']);
+    await this.runCommand('git', ['config', 'user.name', 'Test User']);
   }
 
   /**