diff --git a/composer.json b/composer.json
index 183c56bf..1b72a0f5 100644
--- a/composer.json
+++ b/composer.json
@@ -15,15 +15,15 @@
         }
     ],
     "require": {
+        "php": "^7.3 || ^8.0",
         "silverstripe/cms": "^4",
-        "silverstripe/framework": "^4",
+        "silverstripe/framework": "^4.10",
         "silverstripe/admin": "^1",
         "silverstripe/versioned": "^1",
         "symfony/yaml": "~3.2"
     },
     "require-dev": {
-        "sminnee/phpunit": "^5.7",
-        "squizlabs/php_codesniffer": "^3"
+        "phpunit/phpunit": "^9.5"
     },
     "extra": {
         "expose": [
diff --git a/tests/WorkflowEmbargoExpiryTest.php b/tests/WorkflowEmbargoExpiryTest.php
index 9309eeaf..6419b2f5 100644
--- a/tests/WorkflowEmbargoExpiryTest.php
+++ b/tests/WorkflowEmbargoExpiryTest.php
@@ -27,7 +27,7 @@ class WorkflowEmbargoExpiryTest extends SapphireTest
 {
     protected static $fixture_file = 'WorkflowEmbargoExpiry.yml';
 
-    protected function setUp()
+    protected function setUp(): void
     {
         // Prevent failure if queuedjobs module isn't installed.
         if (!class_exists(AbstractQueuedJob::class)) {
@@ -43,7 +43,7 @@ protected function setUp()
         Config::modify()->set(QueuedJobService::class, 'use_shutdown_function', false);
     }
 
-    protected function tearDown()
+    protected function tearDown(): void
     {
         DBDatetime::clear_mock_now();
         parent::tearDown();
diff --git a/tests/WorkflowEngineTest.php b/tests/WorkflowEngineTest.php
index be4cb36b..96fc2e0e 100644
--- a/tests/WorkflowEngineTest.php
+++ b/tests/WorkflowEngineTest.php
@@ -147,7 +147,7 @@ public function testCreateDefinitionWithEmptyTitle()
         $definition = new WorkflowDefinition();
         $definition->Title = "";
         $definition->write();
-        $this->assertContains(
+        $this->assertStringContainsString(
             'My Workflow',
             $definition->Title,
             'Workflow created without title is assigned a default title.'
diff --git a/tests/WorkflowImportExportTest.php b/tests/WorkflowImportExportTest.php
index ead0eb3f..f50a4ea5 100644
--- a/tests/WorkflowImportExportTest.php
+++ b/tests/WorkflowImportExportTest.php
@@ -13,6 +13,7 @@
 use Symbiote\AdvancedWorkflow\DataObjects\WorkflowDefinition;
 use Symbiote\AdvancedWorkflow\DataObjects\WorkflowTransition;
 use Symbiote\AdvancedWorkflow\Templates\WorkflowTemplate;
+use SilverStripe\ORM\ValidationException;
 
 /**
  * Tests for workflow import/export logic.
@@ -109,7 +110,8 @@ public function testFormatWithoutActions()
     public function testParseBadYAMLNoHeaderImport()
     {
         $importer = new WorkflowDefinitionImporter();
-        $this->setExpectedException('Exception', 'Invalid YAML format.');
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Invalid YAML format.');
         $source = <<<'EOD'
 SilverStripe\Core\Injector\Injector\Injector:
   ExportedWorkflow:
@@ -143,7 +145,8 @@ class: Symbiote\AdvancedWorkflow\Templates\WorkflowTemplate
     public function testParseBadYAMLMalformedImport()
     {
         $importer = new WorkflowDefinitionImporter();
-        $this->setExpectedException('SilverStripe\\ORM\\ValidationException', 'Invalid YAML format. Unable to parse.');
+        $this->expectException(ValidationException::class);
+        $this->expectExceptionMessage('Invalid YAML format. Unable to parse.');
         $source = <<<'EOD'
 ---
 Name: exportedworkflow
@@ -256,7 +259,7 @@ public function testGetImportedWorkflowsMany()
         $imports = $importer->getImportedWorkflows();
 
         $this->assertNotEmpty($imports);
-        $this->assertInternalType('array', $imports);
+        $this->assertIsArray($imports);
         $this->assertGreaterThan(1, count($imports));
     }
 }
diff --git a/tests/WorkflowInstanceTest.php b/tests/WorkflowInstanceTest.php
index b5ce83bb..b4a21d66 100644
--- a/tests/WorkflowInstanceTest.php
+++ b/tests/WorkflowInstanceTest.php
@@ -28,7 +28,7 @@ class WorkflowInstanceTest extends SapphireTest
      */
     protected $currentMember;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
         $this->currentMember = $this->objFromFixture(Member::class, 'ApproverMember01');