diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 2f5d6be9c..1668c800e 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!-- phpunit.xml.dist -->
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" failOnDeprecation="true" displayDetailsOnTestsThatTriggerDeprecations="true" failOnWarning="true" failOnRisky="true" cacheDirectory="var">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" failOnDeprecation="true" displayDetailsOnTestsThatTriggerDeprecations="true" displayDetailsOnTestsThatTriggerWarnings="true" failOnWarning="true" failOnRisky="true" cacheDirectory="var">
   <php>
     <env name="AMPLITUDE_KEY" value=""/>
     <env name="BUGSNAG_KEY" value=""/>
diff --git a/src/Command/CommandBase.php b/src/Command/CommandBase.php
index ce2e92dfc..4a16eaf67 100644
--- a/src/Command/CommandBase.php
+++ b/src/Command/CommandBase.php
@@ -1517,6 +1517,9 @@ private function promptChooseAcsfSite(EnvironmentResponse $cloudEnvironment): mi
         foreach ($acsfSites['sites'] as $domain => $acsfSite) {
             $choices[] = "{$acsfSite['name']} ($domain)";
         }
+        if (!count($choices)) {
+            throw new AcquiaCliException('No sites found in this environment');
+        }
         $choice = $this->io->choice('Choose a site', $choices, $choices[0]);
         $key = array_search($choice, $choices, true);
         $sites = array_values($acsfSites['sites']);
diff --git a/tests/fixtures/no-multisite-config.json b/tests/fixtures/no-multisite-config.json
new file mode 100644
index 000000000..2ed37d370
--- /dev/null
+++ b/tests/fixtures/no-multisite-config.json
@@ -0,0 +1,3 @@
+{"cloud":{"site":"profserv2","env":"01dev"},"memcache_inc":"profiles\/gardens\/modules\/acquia\/memcache\/memcache.inc",
+  "sites": {
+  }}
diff --git a/tests/phpunit/src/CommandTestBase.php b/tests/phpunit/src/CommandTestBase.php
index c4faf3dbd..3546266c3 100644
--- a/tests/phpunit/src/CommandTestBase.php
+++ b/tests/phpunit/src/CommandTestBase.php
@@ -282,11 +282,16 @@ public function mockAcsfEnvironmentsRequest(
 
     /**
      * @return array<mixed>
+     * @throws \Acquia\Cli\Exception\AcquiaCliException
      */
-    protected function mockGetAcsfSites(mixed $sshHelper): array
+    protected function mockGetAcsfSites(SshHelper|ObjectProphecy $sshHelper, bool $existAcsfSites = true): array
     {
         $acsfMultisiteFetchProcess = $this->mockProcess();
-        $multisiteConfig = file_get_contents(Path::join($this->realFixtureDir, '/multisite-config.json'));
+        if ($existAcsfSites) {
+            $multisiteConfig = file_get_contents(Path::join($this->realFixtureDir, '/multisite-config.json'));
+        } else {
+            $multisiteConfig = file_get_contents(Path::join($this->realFixtureDir, '/no-multisite-config.json'));
+        }
         $acsfMultisiteFetchProcess->getOutput()
             ->willReturn($multisiteConfig)
             ->shouldBeCalled();
diff --git a/tests/phpunit/src/Commands/Pull/PullFilesCommandTest.php b/tests/phpunit/src/Commands/Pull/PullFilesCommandTest.php
index 2b373a6be..cf5b102c4 100644
--- a/tests/phpunit/src/Commands/Pull/PullFilesCommandTest.php
+++ b/tests/phpunit/src/Commands/Pull/PullFilesCommandTest.php
@@ -32,7 +32,10 @@ protected function createCommand(): CommandBase
         );
     }
 
-    public function testRefreshAcsfFiles(): void
+    /**
+     * @throws \Exception
+     */
+    public function testPullFilesAcsf(): void
     {
         $applicationsResponse = $this->mockApplicationsRequest();
         $this->mockApplicationRequest();
@@ -69,7 +72,41 @@ public function testRefreshAcsfFiles(): void
         $this->assertStringContainsString('[0] Dev, dev (vcs: master)', $output);
     }
 
-    public function testRefreshCloudFiles(): void
+    /**
+     * @throws \Exception
+     */
+    public function testPullFilesAcsfNoSites(): void
+    {
+        $applicationsResponse = $this->mockApplicationsRequest();
+        $this->mockApplicationRequest();
+        $this->mockAcsfEnvironmentsRequest($applicationsResponse);
+        $sshHelper = $this->mockSshHelper();
+        $this->mockGetAcsfSites($sshHelper, false);
+        $this->command->sshHelper = $sshHelper->reveal();
+
+        $inputs = [
+            // Would you like Acquia CLI to search for a Cloud application that matches your local git config?
+            'n',
+            // Select a Cloud Platform application:
+            0,
+            // Would you like to link the project at ... ?
+            'n',
+            // Choose an Acquia environment:
+            0,
+            // Choose site from which to copy files:
+            0,
+        ];
+
+
+        $this->expectException(AcquiaCliException::class);
+        $this->expectExceptionMessage('No sites found in this environment');
+        $this->executeCommand([], $inputs);
+    }
+
+    /**
+     * @throws \Exception
+     */
+    public function testPullFilesCloud(): void
     {
         $applicationsResponse = $this->mockApplicationsRequest();
         $this->mockApplicationRequest();
@@ -108,6 +145,9 @@ public function testRefreshCloudFiles(): void
         $this->assertStringContainsString('[0] Dev, dev (vcs: master)', $output);
     }
 
+    /**
+     * @throws \Exception
+     */
     public function testInvalidCwd(): void
     {
         IdeHelper::setCloudIdeEnvVars();