diff --git a/autotest.sh b/autotest.sh
index f748cbbed12..84ffa0a1c78 100755
--- a/autotest.sh
+++ b/autotest.sh
@@ -30,8 +30,13 @@ if [ -z "$PHP_EXE" ]; then
 fi
 PHP=$(which "$PHP_EXE")
 if [ -z "$PHPUNIT_EXE" ]; then
-    PHPUNIT_EXE=phpunit
+    if [ -f "build/integration/vendor/bin/phpunit" ]; then
+        PHPUNIT_EXE="./build/integration/vendor/bin/phpunit"
+    else
+        PHPUNIT_EXE=phpunit
+    fi
 fi
+
 PHPUNIT=$(which "$PHPUNIT_EXE")
 
 set -e
@@ -56,7 +61,7 @@ else
 fi
 
 if ! [ -x "$PHPUNIT" ]; then
-	echo "phpunit executable not found, please install phpunit version >= 6.5" >&2
+	echo "phpunit executable not found, please install phpunit version >= 9.0" >&2
 	exit 3
 fi
 
diff --git a/tests/Core/Command/Apps/AppsDisableTest.php b/tests/Core/Command/Apps/AppsDisableTest.php
index 8995ee2673f..2b276948b04 100644
--- a/tests/Core/Command/Apps/AppsDisableTest.php
+++ b/tests/Core/Command/Apps/AppsDisableTest.php
@@ -61,7 +61,7 @@ class AppsDisableTest extends TestCase {
 
 		$this->commandTester->execute($input);
 
-		$this->assertRegExp('/' . $pattern . '/', $this->commandTester->getDisplay());
+		$this->assertMatchesRegularExpression('/' . $pattern . '/', $this->commandTester->getDisplay());
 		$this->assertSame($statusCode, $this->commandTester->getStatusCode());
 	}
 
diff --git a/tests/Core/Command/Apps/AppsEnableTest.php b/tests/Core/Command/Apps/AppsEnableTest.php
index 02bf86cfd43..6e577464103 100644
--- a/tests/Core/Command/Apps/AppsEnableTest.php
+++ b/tests/Core/Command/Apps/AppsEnableTest.php
@@ -66,7 +66,7 @@ class AppsEnableTest extends TestCase {
 
 		$this->commandTester->execute($input);
 
-		$this->assertRegExp('/' . $pattern . '/', $this->commandTester->getDisplay());
+		$this->assertMatchesRegularExpression('/' . $pattern . '/', $this->commandTester->getDisplay());
 		$this->assertSame($statusCode, $this->commandTester->getStatusCode());
 	}
 
diff --git a/tests/Core/Controller/LoginControllerTest.php b/tests/Core/Controller/LoginControllerTest.php
index c97ed53d331..ae033582d3c 100644
--- a/tests/Core/Controller/LoginControllerTest.php
+++ b/tests/Core/Controller/LoginControllerTest.php
@@ -249,27 +249,30 @@ class LoginControllerTest extends TestCase {
 					],
 				]
 			);
-		$this->initialStateService->expects($this->at(0))
+		$this->initialStateService->expects($this->exactly(11))
 			->method('provideInitialState')
-			->with(
+			->withConsecutive([
 				'core',
 				'loginMessages',
 				[
 					'MessageArray1',
 					'MessageArray2',
 					'This community release of Nextcloud is unsupported and push notifications are limited.',
-				]
-			);
-		$this->initialStateService->expects($this->at(1))
-			->method('provideInitialState')
-			->with(
-				'core',
-				'loginErrors',
+				],
+			],
 				[
-					'ErrorArray1',
-					'ErrorArray2',
-				]
-			);
+					'core',
+					'loginErrors',
+					[
+						'ErrorArray1',
+						'ErrorArray2',
+					],
+				],
+				[
+					'core',
+					'loginUsername',
+					'',
+				]);
 
 		$expectedResponse = new TemplateResponse(
 			'core',
@@ -288,13 +291,17 @@ class LoginControllerTest extends TestCase {
 			->expects($this->once())
 			->method('isLoggedIn')
 			->willReturn(false);
-		$this->initialStateService->expects($this->at(4))
+		$this->initialStateService->expects($this->exactly(12))
 			->method('provideInitialState')
-			->with(
+			->withConsecutive([], [], [], [
+				'core',
+				'loginAutocomplete',
+				false
+			], [
 				'core',
 				'loginRedirectUrl',
 				'login/flow'
-			);
+			]);
 
 		$expectedResponse = new TemplateResponse(
 			'core',
@@ -355,20 +362,17 @@ class LoginControllerTest extends TestCase {
 			->method('get')
 			->with('LdapUser')
 			->willReturn($user);
-		$this->initialStateService->expects($this->at(2))
+		$this->initialStateService->expects($this->exactly(11))
 			->method('provideInitialState')
-			->with(
+			->withConsecutive([], [], [
 				'core',
 				'loginUsername',
 				'LdapUser'
-			);
-		$this->initialStateService->expects($this->at(6))
-			->method('provideInitialState')
-			->with(
+			], [], [], [], [
 				'core',
 				'loginCanResetPassword',
 				$expectedResult
-			);
+			]);
 
 		$expectedResponse = new TemplateResponse(
 			'core',
@@ -408,27 +412,21 @@ class LoginControllerTest extends TestCase {
 			->method('get')
 			->with('0')
 			->willReturn($user);
-		$this->initialStateService->expects($this->at(3))
+		$this->initialStateService->expects($this->exactly(11))
 			->method('provideInitialState')
-			->with(
+			->withConsecutive([], [], [], [
 				'core',
 				'loginAutocomplete',
 				true
-			);
-		$this->initialStateService->expects($this->at(5))
-			->method('provideInitialState')
-			->with(
+			], [], [
 				'core',
 				'loginResetPasswordLink',
 				false
-			);
-		$this->initialStateService->expects($this->at(6))
-			->method('provideInitialState')
-			->with(
+			], [
 				'core',
 				'loginCanResetPassword',
 				false
-			);
+			]);
 
 		$expectedResponse = new TemplateResponse(
 			'core',
diff --git a/tests/Core/Controller/NavigationControllerTest.php b/tests/Core/Controller/NavigationControllerTest.php
index 39f389faa5e..ddf307ec06d 100644
--- a/tests/Core/Controller/NavigationControllerTest.php
+++ b/tests/Core/Controller/NavigationControllerTest.php
@@ -74,14 +74,13 @@ class NavigationControllerTest extends TestCase {
 			$this->urlGenerator->expects($this->any())
 				->method('getBaseURL')
 				->willReturn('http://localhost/');
-			$this->urlGenerator->expects($this->at(1))
+			$this->urlGenerator->expects($this->exactly(2))
 				->method('getAbsoluteURL')
-				->with('/index.php/apps/files')
-				->willReturn('http://localhost/index.php/apps/files');
-			$this->urlGenerator->expects($this->at(3))
-				->method('getAbsoluteURL')
-				->with('icon')
-				->willReturn('http://localhost/icon');
+				->withConsecutive(['/index.php/apps/files'], ['icon'])
+				->willReturnOnConsecutiveCalls(
+					'http://localhost/index.php/apps/files',
+					'http://localhost/icon'
+				);
 			$actual = $this->controller->getAppsNavigation($absolute);
 			$this->assertInstanceOf(DataResponse::class, $actual);
 			$this->assertEquals('http://localhost/index.php/apps/files', $actual->getData()[0]['href']);
@@ -104,14 +103,16 @@ class NavigationControllerTest extends TestCase {
 			$this->urlGenerator->expects($this->any())
 				->method('getBaseURL')
 				->willReturn('http://localhost/');
-			$this->urlGenerator->expects($this->at(1))
+			$this->urlGenerator->expects($this->exactly(2))
 				->method('getAbsoluteURL')
-				->with('/index.php/settings/user')
-				->willReturn('http://localhost/index.php/settings/user');
-			$this->urlGenerator->expects($this->at(3))
-				->method('getAbsoluteURL')
-				->with('/core/img/settings.svg')
-				->willReturn('http://localhost/core/img/settings.svg');
+				->withConsecutive(
+					['/index.php/settings/user'],
+					['/core/img/settings.svg']
+				)
+				->willReturnOnConsecutiveCalls(
+					'http://localhost/index.php/settings/user',
+					'http://localhost/core/img/settings.svg'
+				);
 			$actual = $this->controller->getSettingsNavigation($absolute);
 			$this->assertInstanceOf(DataResponse::class, $actual);
 			$this->assertEquals('http://localhost/index.php/settings/user', $actual->getData()[0]['href']);
diff --git a/tests/Core/Controller/TwoFactorChallengeControllerTest.php b/tests/Core/Controller/TwoFactorChallengeControllerTest.php
index 27b0f476b61..baf7feaa068 100644
--- a/tests/Core/Controller/TwoFactorChallengeControllerTest.php
+++ b/tests/Core/Controller/TwoFactorChallengeControllerTest.php
@@ -316,12 +316,12 @@ class TwoFactorChallengeControllerTest extends TestCase {
 			->method('verifyChallenge')
 			->with('myprovider', $user, 'token')
 			->will($this->throwException($exception));
-		$this->session->expects($this->at(0))
+		$this->session->expects($this->exactly(2))
 			->method('set')
-			->with('two_factor_auth_error_message', "2FA failed");
-		$this->session->expects($this->at(1))
-			->method('set')
-			->with('two_factor_auth_error', true);
+			->withConsecutive(
+				['two_factor_auth_error_message', '2FA failed'],
+				['two_factor_auth_error', true]
+			);
 		$this->urlGenerator->expects($this->once())
 			->method('linkToRoute')
 			->with('core.TwoFactorChallenge.showChallenge', [
diff --git a/tests/Core/Service/LoginFlowV2ServiceUnitTest.php b/tests/Core/Service/LoginFlowV2ServiceUnitTest.php
index c3128dca334..57443ca1328 100644
--- a/tests/Core/Service/LoginFlowV2ServiceUnitTest.php
+++ b/tests/Core/Service/LoginFlowV2ServiceUnitTest.php
@@ -350,7 +350,7 @@ class LoginFlowV2ServiceUnitTest extends TestCase {
 
 		// app password is encrypted and must look like:
 		// ZACZOOzxTpKz4+KXL5kZ/gCK0xvkaVi/8yzupAn6Ui6+5qCSKvfPKGgeDRKs0sivvSLzk/XSp811SZCZmH0Y3g==
-		$this->assertRegExp('/[a-zA-Z\/0-9+=]+/', $loginFlowV2->getAppPassword());
+		$this->assertMatchesRegularExpression('/[a-zA-Z\/0-9+=]+/', $loginFlowV2->getAppPassword());
 
 		$this->assertEquals('server', $loginFlowV2->getServer());
 	}