diff --git a/integration-tests/multi_test.go b/integration-tests/multi_test.go
new file mode 100644
index 00000000..eaa505a0
--- /dev/null
+++ b/integration-tests/multi_test.go
@@ -0,0 +1,62 @@
+package tests
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/upsun/cli/pkg/mockapi"
+)
+
+func TestMulti(t *testing.T) {
+	authServer := mockapi.NewAuthServer(t)
+	defer authServer.Close()
+
+	apiHandler := mockapi.NewHandler(t)
+	apiServer := httptest.NewServer(apiHandler)
+	defer apiServer.Close()
+
+	projectID1 := mockapi.ProjectID()
+	projectID2 := mockapi.ProjectID()
+
+	apiHandler.SetProjects([]*mockapi.Project{
+		{
+			ID:    projectID1,
+			Title: "Project One",
+			Links: mockapi.MakeHALLinks("self=/projects/" + projectID1),
+		},
+		{
+			ID:    projectID2,
+			Title: "Project Two",
+			Links: mockapi.MakeHALLinks("self=/projects/" + projectID2),
+		},
+	})
+
+	f := newCommandFactory(t, apiServer.URL, authServer.URL)
+
+	stdOut, stdErr, err := f.RunCombinedOutput(
+		"multi", "-p", projectID1+","+projectID2, "--", "pro:info", "title",
+	)
+	assert.NoError(t, err)
+	assert.Contains(t, stdOut, "Project One")
+	assert.Contains(t, stdOut, "Project Two")
+	assert.Contains(t, stdErr, "Running command on 2 projects")
+	assert.Contains(t, stdErr, "("+projectID1+")")
+	assert.Contains(t, stdErr, "("+projectID2+")")
+
+	stdOut, _, err = f.RunCombinedOutput(
+		"multi", "-p", projectID1, "-p", projectID2, "--", "pro:info", "title",
+	)
+	assert.NoError(t, err)
+	assert.Contains(t, stdOut, "Project One")
+	assert.Contains(t, stdOut, "Project Two")
+
+	stdOut, stdErr, err = f.RunCombinedOutput(
+		"multi", "-p", "nonexistent-id", "--", "pro:info", "title",
+	)
+	assert.Error(t, err)
+	assert.Contains(t, stdErr, "Project ID(s) not found")
+	assert.Contains(t, stdErr, "nonexistent-id")
+	assert.NotContains(t, stdOut, "Project One")
+}
diff --git a/legacy/src/Command/MultiCommand.php b/legacy/src/Command/MultiCommand.php
index 68ca85c7..019489fe 100644
--- a/legacy/src/Command/MultiCommand.php
+++ b/legacy/src/Command/MultiCommand.php
@@ -36,7 +36,7 @@ protected function configure(): void
     {
         $this
             ->addArgument('cmd', InputArgument::REQUIRED | InputArgument::IS_ARRAY, 'The command to execute')
-            ->addOption('projects', 'p', InputOption::VALUE_REQUIRED, 'A list of project IDs. ' . ArrayArgument::SPLIT_HELP)
+            ->addOption('projects', 'p', InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY, 'A list of project IDs. ' . ArrayArgument::SPLIT_HELP)
             ->addOption('continue', null, InputOption::VALUE_NONE, 'Continue running commands even if an exception is encountered')
             ->addOption('sort', null, InputOption::VALUE_REQUIRED, 'A property by which to sort the list of project options', 'title')
             ->addOption('reverse', null, InputOption::VALUE_NONE, 'Reverse the order of project options');