diff --git a/app/code/Magento/Braintree/Test/Unit/Model/InstantPurchase/CreditCard/AvailabilityCheckerTest.php b/app/code/Magento/Braintree/Test/Unit/Model/InstantPurchase/CreditCard/AvailabilityCheckerTest.php
new file mode 100644
index 0000000000000..2248aab1aad2e
--- /dev/null
+++ b/app/code/Magento/Braintree/Test/Unit/Model/InstantPurchase/CreditCard/AvailabilityCheckerTest.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Braintree\Test\Unit\Model\InstantPurchase\CreditCard;
+
+use Magento\Braintree\Gateway\Config\Config;
+use Magento\Braintree\Model\InstantPurchase\CreditCard\AvailabilityChecker;
+
+/**
+ * @covers \Magento\Braintree\Model\InstantPurchase\CreditCard\AvailabilityChecker
+ */
+class AvailabilityCheckerTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * Testable Object
+     *
+     * @var AvailabilityChecker
+     */
+    private $availabilityChecker;
+
+    /**
+     * @var Config|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $configMock;
+
+    /**
+     * Set Up
+     *
+     * @return void
+     */
+    protected function setUp()
+    {
+        $this->configMock = $this->createMock(Config::class);
+        $this->availabilityChecker = new AvailabilityChecker($this->configMock);
+    }
+
+    /**
+     * Test isAvailable method
+     *
+     * @dataProvider isAvailableDataProvider
+     *
+     * @param bool $isVerify3DSecure
+     * @param bool $expected
+     *
+     * @return void
+     */
+    public function testIsAvailable(bool $isVerify3DSecure, bool $expected)
+    {
+        $this->configMock->expects($this->once())->method('isVerify3DSecure')->willReturn($isVerify3DSecure);
+        $actual = $this->availabilityChecker->isAvailable();
+        self::assertEquals($expected, $actual);
+    }
+
+    /**
+     * Data provider for isAvailable method test
+     *
+     * @return array
+     */
+    public function isAvailableDataProvider()
+    {
+        return [
+            [true, false],
+            [false, true],
+        ];
+    }
+}
diff --git a/app/code/Magento/Braintree/Test/Unit/Model/InstantPurchase/PaymentAdditionalInformationProviderTest.php b/app/code/Magento/Braintree/Test/Unit/Model/InstantPurchase/PaymentAdditionalInformationProviderTest.php
new file mode 100644
index 0000000000000..2631fcbe5f5b5
--- /dev/null
+++ b/app/code/Magento/Braintree/Test/Unit/Model/InstantPurchase/PaymentAdditionalInformationProviderTest.php
@@ -0,0 +1,83 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Braintree\Test\Unit\Model\InstantPurchase;
+
+use Magento\Braintree\Gateway\Command\GetPaymentNonceCommand;
+use Magento\Braintree\Model\InstantPurchase\PaymentAdditionalInformationProvider;
+use Magento\Payment\Gateway\Command\Result\ArrayResult;
+use Magento\Vault\Api\Data\PaymentTokenInterface;
+
+/**
+ * @covers \Magento\Braintree\Model\InstantPurchase\PaymentAdditionalInformationProvider
+ */
+class PaymentAdditionalInformationProviderTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * Testable Object
+     *
+     * @var PaymentAdditionalInformationProvider
+     */
+    private $paymentAdditionalInformationProvider;
+
+    /**
+     * @var GetPaymentNonceCommand|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $getPaymentNonceCommandMock;
+
+    /**
+     * @var PaymentTokenInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $paymentTokenMock;
+
+    /**
+     * @var ArrayResult|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $arrayResultMock;
+
+    /**
+     * Set Up
+     *
+     * @return void
+     */
+    protected function setUp()
+    {
+        $this->getPaymentNonceCommandMock = $this->createMock(GetPaymentNonceCommand::class);
+        $this->paymentTokenMock = $this->createMock(PaymentTokenInterface::class);
+        $this->arrayResultMock = $this->createMock(ArrayResult::class);
+        $this->paymentAdditionalInformationProvider = new PaymentAdditionalInformationProvider(
+            $this->getPaymentNonceCommandMock
+        );
+    }
+
+    /**
+     * Test getAdditionalInformation method
+     *
+     * @return void
+     */
+    public function testGetAdditionalInformation()
+    {
+        $customerId = 15;
+        $publicHash = '3n4b7sn48g';
+        $paymentMethodNonce = 'test';
+
+        $this->paymentTokenMock->expects($this->once())->method('getCustomerId')->willReturn($customerId);
+        $this->paymentTokenMock->expects($this->once())->method('getPublicHash')->willReturn($publicHash);
+        $this->getPaymentNonceCommandMock->expects($this->once())->method('execute')->with([
+            PaymentTokenInterface::CUSTOMER_ID => $customerId,
+            PaymentTokenInterface::PUBLIC_HASH => $publicHash,
+        ])->willReturn($this->arrayResultMock);
+        $this->arrayResultMock->expects($this->once())->method('get')
+            ->willReturn(['paymentMethodNonce' => $paymentMethodNonce]);
+
+        $expected = [
+            'payment_method_nonce' => $paymentMethodNonce,
+        ];
+        $actual = $this->paymentAdditionalInformationProvider->getAdditionalInformation($this->paymentTokenMock);
+        self::assertEquals($expected, $actual);
+    }
+}
diff --git a/app/code/Magento/Braintree/Test/Unit/Model/LocaleResolverTest.php b/app/code/Magento/Braintree/Test/Unit/Model/LocaleResolverTest.php
new file mode 100644
index 0000000000000..b6ef534c55c29
--- /dev/null
+++ b/app/code/Magento/Braintree/Test/Unit/Model/LocaleResolverTest.php
@@ -0,0 +1,138 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Braintree\Test\Unit\Model;
+
+use Magento\Braintree\Gateway\Config\PayPal\Config;
+use Magento\Braintree\Model\LocaleResolver;
+use Magento\Framework\Locale\ResolverInterface;
+
+/**
+ * @covers \Magento\Braintree\Model\LocaleResolver
+ */
+class LocaleResolverTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * Testable Object
+     *
+     * @var LocaleResolver
+     */
+    private $localeResolver;
+
+    /**
+     * @var Config|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $configMock;
+
+    /**
+     * @var ResolverInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $resolverMock;
+
+    /**
+     * Set Up
+     *
+     * @return void
+     */
+    protected function setUp()
+    {
+        $this->configMock = $this->createMock(Config::class);
+        $this->resolverMock = $this->createMock(ResolverInterface::class);
+        $this->localeResolver = new LocaleResolver($this->resolverMock, $this->configMock);
+    }
+
+    /**
+     * Test getDefaultLocalePath method
+     *
+     * @return void
+     */
+    public function testGetDefaultLocalePath()
+    {
+        $expected = 'general/locale/code';
+        $this->resolverMock->expects($this->once())->method('getDefaultLocalePath')->willReturn($expected);
+        $actual = $this->localeResolver->getDefaultLocalePath();
+        self::assertEquals($expected, $actual);
+    }
+
+    /**
+     * Test setDefaultLocale method
+     *
+     * @return void
+     */
+    public function testSetDefaultLocale()
+    {
+        $defaultLocale = 'en_US';
+        $this->resolverMock->expects($this->once())->method('setDefaultLocale')->with($defaultLocale);
+        $this->localeResolver->setDefaultLocale($defaultLocale);
+    }
+
+    /**
+     * Test getDefaultLocale method
+     *
+     * @return void
+     */
+    public function testGetDefaultLocale()
+    {
+        $expected = 'fr_FR';
+        $this->resolverMock->expects($this->once())->method('getDefaultLocale')->willReturn($expected);
+        $actual = $this->localeResolver->getDefaultLocale();
+        self::assertEquals($expected, $actual);
+    }
+
+    /**
+     * Test setLocale method
+     *
+     * @return void
+     */
+    public function testSetLocale()
+    {
+        $locale = 'en_GB';
+        $this->resolverMock->expects($this->once())->method('setLocale')->with($locale);
+        $this->localeResolver->setLocale($locale);
+    }
+
+    /**
+     * Test getLocale method
+     *
+     * @return void
+     */
+    public function testGetLocale()
+    {
+        $locale = 'en_TEST';
+        $allowedLocales = 'en_US,en_GB,en_AU,da_DK,fr_FR,fr_CA,de_DE,zh_HK,it_IT,nl_NL';
+        $this->resolverMock->expects($this->once())->method('getLocale')->willReturn($locale);
+        $this->configMock->expects($this->once())->method('getValue')->with('supported_locales')
+            ->willReturn($allowedLocales);
+
+        $expected = 'en_US';
+        $actual = $this->localeResolver->getLocale();
+        self::assertEquals($expected, $actual);
+    }
+
+    /**
+     * Test emulate method
+     *
+     * @return void
+     */
+    public function testEmulate()
+    {
+        $scopeId = 12;
+        $this->resolverMock->expects($this->once())->method('emulate')->with($scopeId);
+        $this->localeResolver->emulate($scopeId);
+    }
+
+    /**
+     * Test revert method
+     *
+     * @return void
+     */
+    public function testRevert()
+    {
+        $this->resolverMock->expects($this->once())->method('revert');
+        $this->localeResolver->revert();
+    }
+}