diff --git a/.travis.yml b/.travis.yml
index b15e0fa8..c244c3b8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,3 @@ version: ~> 1.0
 
 import:
   - silverstripe/silverstripe-travis-shared:config/provision/standard-jobs-range.yml
-
-env:
-  global:
-    - REQUIRE_RECIPE="4.7.x-dev || "
diff --git a/composer.json b/composer.json
index 6d819207..502fe101 100644
--- a/composer.json
+++ b/composer.json
@@ -15,13 +15,13 @@
         }
     ],
     "require": {
-        "php": "^7.1 || ^8.0",
-        "silverstripe/framework": "^4.7",
+        "php": "^7.3 || ^8.0",
+        "silverstripe/framework": "^4.10",
         "silverstripe/admin": "^1",
         "asyncphp/doorman": "^3.1"
     },
     "require-dev": {
-        "sminnee/phpunit": "^5.7",
+        "phpunit/phpunit": "^9.5",
         "squizlabs/php_codesniffer": "^3"
     },
     "minimum-stability": "dev",
diff --git a/tests/AbstractTest.php b/tests/AbstractTest.php
index 12c6a3cc..1c31f511 100644
--- a/tests/AbstractTest.php
+++ b/tests/AbstractTest.php
@@ -7,7 +7,7 @@
 
 abstract class AbstractTest extends SapphireTest
 {
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
diff --git a/tests/CleanupJobTest.php b/tests/CleanupJobTest.php
index e0f445a6..7df862fd 100644
--- a/tests/CleanupJobTest.php
+++ b/tests/CleanupJobTest.php
@@ -21,7 +21,7 @@ class CleanupJobTest extends AbstractTest
     /**
      * {@inheritDoc}
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         // Have to set a fake time here to work with
         // the LastEdited dates in the fixture
@@ -33,7 +33,7 @@ protected function setUp()
     /**
      * {@inheritDoc}
      */
-    protected function tearDown()
+    protected function tearDown(): void
     {
         parent::tearDown();
         DBDatetime::clear_mock_now();
@@ -52,7 +52,7 @@ public function testByDays()
         );
         $job->process();
         $data = $job->getJobData();
-        $this->assertContains("2 jobs cleaned up.", $data->messages[0]);
+        $this->assertStringContainsString("2 jobs cleaned up.", $data->messages[0]);
     }
 
     public function testByNumber()
@@ -68,7 +68,7 @@ public function testByNumber()
         );
         $job->process();
         $data = $job->getJobData();
-        $this->assertContains("2 jobs cleaned up.", $data->messages[0]);
+        $this->assertStringContainsString("2 jobs cleaned up.", $data->messages[0]);
     }
 
     public function testByStatus()
@@ -84,7 +84,7 @@ public function testByStatus()
         );
         $job->process();
         $data = $job->getJobData();
-        $this->assertContains("3 jobs cleaned up.", $data->messages[0]);
+        $this->assertStringContainsString("3 jobs cleaned up.", $data->messages[0]);
     }
 
     public function testNoCleanup()
@@ -100,6 +100,6 @@ public function testNoCleanup()
         );
         $job->process();
         $data = $job->getJobData();
-        $this->assertContains("No jobs to clean up.", $data->messages[0]);
+        $this->assertStringContainsString("No jobs to clean up.", $data->messages[0]);
     }
 }
diff --git a/tests/QueuedJobsAdminTest.php b/tests/QueuedJobsAdminTest.php
index bb89e054..b9bb11f4 100644
--- a/tests/QueuedJobsAdminTest.php
+++ b/tests/QueuedJobsAdminTest.php
@@ -41,7 +41,7 @@ class QueuedJobsAdminTest extends FunctionalTest
      *
      * {@inheritDoc}
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
diff --git a/tests/QueuedJobsTest.php b/tests/QueuedJobsTest.php
index cee03b90..16b7e90e 100644
--- a/tests/QueuedJobsTest.php
+++ b/tests/QueuedJobsTest.php
@@ -34,7 +34,7 @@ class QueuedJobsTest extends AbstractTest
     /**
      * {@inheritDoc}
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
@@ -51,7 +51,7 @@ protected function setUp()
         DBDatetime::set_mock_now('2016-01-01 16:00:00');
     }
 
-    protected function tearDown()
+    protected function tearDown(): void
     {
         parent::tearDown();
 
diff --git a/tests/ScheduledExecutionTest.php b/tests/ScheduledExecutionTest.php
index 81cb2dc8..76d87214 100644
--- a/tests/ScheduledExecutionTest.php
+++ b/tests/ScheduledExecutionTest.php
@@ -29,7 +29,7 @@ class ScheduledExecutionTest extends AbstractTest
         TestScheduledDataObject::class
     );
 
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();