fix test case

src/Command/Api/ApiBaseCommand.php

@@ -110,6 +110,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
       $response = $acquiaCloudClient->request($this->method, $path);
       $exitCode = 0;
     }
+    // Ignore PhpStorm warning here.
+    // @see https://youtrack.jetbrains.com/issue/WI-77190/Exception-is-never-thrown-when-thrown-from-submethod
     catch (ApiErrorException $exception) {
       $response = $exception->getResponseBody();
       $exitCode = 1;

tests/phpunit/src/Commands/Api/ApiBaseCommandTest.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Acquia\Cli\Tests\Commands\Api;
+
+use Acquia\Cli\Command\Api\ApiBaseCommand;
+use Acquia\Cli\Command\CommandBase;
+use Acquia\Cli\Exception\AcquiaCliException;
+use Acquia\Cli\Tests\CommandTestBase;
+
+class ApiBaseCommandTest extends CommandTestBase {
+
+  protected function createCommand(): CommandBase {
+    return $this->injectCommand(ApiBaseCommand::class);
+  }
+
+  public function testApiBaseCommand(): void {
+    $this->expectException(AcquiaCliException::class);
+    $this->expectExceptionMessage('api:base is not a valid command');
+    $this->executeCommand();
+  }
+
+}